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Foxtel IQ, a combined digital video recorder and satellite set-top box.
Foxtel IQ, a combined digital video recorder and satellite set-top box. Foxtel is an Australian Pay television company formed through a joint venture between Telstra, News Corporation and Consolidated Media A set-top box (STB or set-top unit (STU is a device that connects to a Television and an external source of signal, turning the signal into

A digital video recorder (DVR) or personal video recorder (PVR) is a device that records video in a digital format to a disk drive or other memory medium within a device. Disk storage is a general category of a Computer storage mechanisms in which data is recorded on planar round and rotating surfaces ( disks, discs, or The term includes stand-alone set-top boxes, portable media players (PMP) and software for personal computers which enables video capture and playback to and from disk. A portable multimedia player ( PMP) sometimes referred to as a portable video player ( PVP) is a Consumer electronics device that is capable Some consumer electronic manufacturers have started to offer televisions with DVR hardware and software built in to the television itself. It has also become the main way for CCTV companies to record their surveillance, as it provides far longer recording times than the previously used VCRs. Closed-circuit television ( CCTV) is the use of Video cameras to transmit a signal to a specific place limited set of monitors PLEASE BEAR IN MIND THAT THIS IS A GENERAL ARTICLE ABOUT VCRs/VIDEOCASSETTE RECORDERS

Contents

History

In 1985, while working at Honeywell’s Physical Sciences Center, David Rafner first described a drive-based DVR designed for home TV recording, time-slipping, and skipping commercials. Commercial skipping is an advanced feature in some digital video recorders (DVRs that makes it possible to automatically skip commercials in recorded programs U.S. Patent 4,972,396  focused on a multi-channel design to allow simultaneous independent recording and playback. Broadly anticipating future DVR developments, it describes possible applications such as streaming compression, editing, captioning, multi-channel security monitoring, military sensor platforms, and remotely piloted vehicles.

Hard disk-based DVRs

Back view of a TiVo Series2 5xx-generation unit.
Back view of a TiVo Series2 5xx-generation unit. TiVo (pronounced ˈtiːvoʊ is a brand of Digital video recorder (DVR in the United States, Canada, and Australia created by TiVo

The two early consumer DVRs, ReplayTV and TiVo, were launched at the 1999 Consumer Electronics Show in Las Vegas. ReplayTV is a brand of Digital video recorder (DVR a term synonymous with personal video recorder (PVR TiVo (pronounced ˈtiːvoʊ is a brand of Digital video recorder (DVR in the United States, Canada, and Australia created by TiVo The International Consumer Electronics Show (CES is a Trade show held each January in Las Vegas, Nevada, and is sponsored Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally Microsoft also demonstrated a unit with DVR capability but commercial availability of this software would have to wait until the end of 1999 for full DVR features in Dish Network's DISHplayer receivers. TiVo shipped their first units on March 31, 1999, and to this day the last Friday in March is celebrated as a company holiday known as 'Blue Moon'. Events 307 - After divorcing his wife Minervina, Constantine marries Fausta, the daughter of the retired Roman Emperor Year 1999 ( MCMXCIX) was a Common year starting on Friday (link will display full 1999 Gregorian calendar) [1] Although ReplayTV won the "Best of Show" award in the video category, it was TiVo that went on to much greater commercial success. The devices have steadily developed complementary abilities, such as recording onto DVDs, commercial skip, sharing of recordings over the Internet, and programming and remote control facilities using PDAs, networked PCs, and Web browsers. DVD (also known as " Digital Versatile Disc " or " Digital Video Disc " - see Etymology)is

This makes the "time shifting" feature (traditionally done by a VCR) much more convenient, and also allows for "trick modes" such as pausing live TV, instant replay of interesting scenes, chasing playback where a recording can be viewed before it has been completed and skipping advertising. Timeshifting redirects here For the video game see TimeShift. PLEASE BEAR IN MIND THAT THIS IS A GENERAL ARTICLE ABOUT VCRs/VIDEOCASSETTE RECORDERS Chase Play is a Timeshifting facility of DVD-RAM DVD recorders and many Personal video recorders It allows a user to simultaneously watch Advertising is a form of Communication that typically attempts to persuade potential Customers to Purchase or to consume more of a particular Brand Most DVRs use the MPEG format for compressing the digitized video signals. The Moving Picture Experts Group, commonly referred to as simply MPEG, is a Working group of ISO / IEC charged with the development of video and

DVRs tied to a video service: At the 1999 CES show Dish Network demonstrated the hardware that would later have DVR capability with the assistance of Microsoft software. The 7100 satellite receiver (later rebranded as the DISHPlayer)[2]. Users would have to wait until June 1999 for simple time shifting capabilities in the 7100, rebranded as the DISHPlayer satellite receiver,[3] which also included WebTV Networks internet TV. [4] By the end of 1999 the Dishplayer had full DVR capabilities and within a year, over 200,000 units were sold. [5][6]

In the UK, DVRs are often referred to as plus boxes (such as BSKYB's sky + and Virgin Medias V+ which integrates an HD Capability). The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located British Sky Broadcasting markets a popular combined EPG and DVR as Sky+. Sky+, or Sky Plus, is a Personal video recorder (PVR service for Sky Digital, and is very similar in principle to the TiVo service (which South African based Africa Satellite TV beamer Multichoice recently launched their PVR which is available on their Dstv platform. In addition to ReplayTV and TiVo, there are a number of other suppliers of digital terrestrial (DTT) DVRs, including Thomson, Topfield, Fusion, Pace Micro Technology and Humax. Established in Korea in 1998 TOPFIELD Co Ltd is a Consumer electronics manufacturer making broadcasting receivers other video and Humax is an Electronics company Founded in South Korea in 1989 it manufactures set-top boxes, Digital video recorders, Televisions

Many satellite and cable companies are incorporating DVR functions into their set-top box, such as with DirecTiVo, DISHPlayer/DishDVR, Scientific Atlanta Explorer 8xxx from Time Warner, Motorola 6xxx from Comcast, Moxi Media Center by Digeo (available through Charter, Adelphia, Sunflower, Bend Broadband, and soon Comcast and other cable companies), or Sky+. A set-top box (STB or set-top unit (STU is a device that connects to a Television and an external source of signal, turning the signal into "DirecTiVo" is an informal term for the implemented combination of DirecTV Satellite television programming service and the TiVo Digital The Explorer 8300 is a digital video recorder ( DVR) manufactured by Scientific Atlanta and used by many Digital cable companies The Motorola 6000 series of HDTV cable boxes includes several models Motorola 6200 HDTV Cable Box with no recording capabilities Motorola 6208 Single The Moxi Media center is a mediocre electronic device that allows users to record television programming to an internal hard drive for reviewing at a later time Also LG Group offers a television with DVR functions built in.

In the case of digital television, there is no encoding necessary in the DVR since the signal is already a digitally encoded MPEG stream. The DVR simply stores the digital stream directly to disk. Having the broadcaster involved with, and sometimes subsidizing, the design of the DVR can lead to features such as the ability to use interactive TV on recorded shows, pre-loading of programs, or directly recording encrypted digital streams. It can, however, also force the manufacturer to implement non-skippable advertisements and automatically-expiring recordings.

In the United States, the FCC has ruled that starting on July 1, 2007, consumers will be able to purchase a set-top box from a third-party company, rather than being forced to purchase or rent the set-top box from their cable company. "July 1st" redirects here For the Ayumi Hamasaki song see H (song. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. [7] This ruling only applies to "navigation devices," otherwise known as a cable television set-top box, and not to the security functions that control the user’s access to the content of the cable operator. [8] The overall net effect on DVRs and related technology is unlikely to be substantial as standalone DVRs are currently readily available on the open market. The first DVR Manufecturer in India is TAB Technologies.

Introduction of dual-tuners

In 2003 many Satellite and Cable providers introduced dual-tuner DVRs. Year 2003 ( MMIII) was a Common year starting on Wednesday of the Gregorian calendar. In the UK, BSkyB introduced their first PVR Sky+ with dual tuner support in 2001. British Sky Broadcasting ( BSkyB — Sky Television and BSB) is a company that operates Sky Digital, a subscription television service in the Sky+, or Sky Plus, is a Personal video recorder (PVR service for Sky Digital, and is very similar in principle to the TiVo service (which These machines have two tuners within the same receiver to operate independently of one another. The main use for this feature is the capability to record a live program while watching another live program simultaneously or to record two programs at the same time while watching a previously recorded one. Some dual-tuner DVRs also have the ability to operate two separate television sets at the same time. The PVR manufactured by UEC (Durban, South Africa) and used by Multichoice has the ability to view two programs while recording a third using a triple tuner. Durban (eThekwini is the third most populous city in South Africa, forming part of the EThekwini metropolitan municipality. The Republic of South Africa (also known by other official names) is a country located at the southern tip of the continent of Africa MultiChoice is a South African company which operates the DStv Satellite television service the main satellite TV service in Sub-Saharan With some machines, such as the Scientific Atlanta 8300DVB PVR, it is possible to view one program whilst recording two other programs according to the users preference. Scientific Atlanta Inc, a Cisco company is a Georgia -based manufacturer of Cable television, Telecommunications, and Broadband

PCs

Software and hardware is available which can turn personal computers running Microsoft Windows, Linux, and Macintosh into PVRs, and is a popular option for home-theater PC (HTPC) enthusiasts. Microsoft Windows is a series of Software Operating systems and Graphical user interfaces produced by Microsoft. Linux (commonly pronounced ˈlɪnəks Mac OS is the trademarked name for a series of Graphical user interface -based Operating systems developed by Apple Inc A Home Theater PC ( HTPC) or media PC is a convergence device that combines the functions of a Personal computer and a Digital video recorder.

Linux

There are many free DVR applications available for Linux, each released as free and open source software under the GNU General Public License:

A commercial and proprietary application called SageTV is available for most popular Linux distributions. Linux (commonly pronounced ˈlɪnəks Free software or software libre is Software that can be used studied and modified without restriction and which can be copied and redistributed in modified or unmodified Open source software (OSS began as a marketing campaign for Free software. MythTV is a free Unix application which turns a computer with the necessary hardware into a network streaming Digital video recorder Freevo is a full featured Personal video recorder application for Linux, BSD, and Mac OS X similar to MythTV. VDR ( Video Disk Recorder) is an Open source application for Linux designed to allow any computer to function as a Digital video recorder Proprietary software is Computer software on which the producer has set restrictions on use private modification copying, or republishing. SageTV Media Center is a commercial digital video recording (DVR Software package for Mac OS X, Windows and Linux.

Macintosh

Elgato makes a series of DVR devices called EyeTV. Elgato Systems is a hardware and software manufacturer that makes television viewing and recording products specifically for the Macintosh family of personal computers including The software supplied with each device is also called EyeTV, and is available separately for use on compatible third-party tuners [1] from manufacturers such as Pinnacle, TerraTec, and Hauppauge.

SageTV provides DVR software for the Mac with built in placeshifting for watching TV remotely and sells and supports the Hauppauge HVR-950, myTV. SageTV Media Center is a commercial digital video recording (DVR Software package for Mac OS X, Windows and Linux. PVR and HDHomeRun hardware with its DVR software. SageTV software also includes the ability to watch YouTube and other online video with a remote control. SageTV Media Center is a commercial digital video recording (DVR Software package for Mac OS X, Windows and Linux.

Other Macintosh DVR products include myTV.PVR from Hauppauge/EskapeLabs and ConvertX PVR from Plextor. MythTV (see above) also runs under Mac OS X, but most recording devices are currently only supported under Linux. MythTV is a free Unix application which turns a computer with the necessary hardware into a network streaming Digital video recorder Mac OS X (mæk oʊ ɛs tɛn is a line of computer Operating systems developed marketed and sold by Apple Inc, the latest of which is pre-loaded on all currently Precompiled binaries are available for the MythTV front-end, allowing a Mac to watch video from (and control) a MythTV server running under Linux.

Apple provides applications in the FireWire software developer kit which allow any Macintosh with a FireWire port to record the MPEG2 transport stream from a FireWire equipped cable box (for example: Motorola 62xx, including HD streams). Applications can also change channels on the cable box via the firewire interface. Only broadcast channels can be recorded as the rest of the channels are encrypted. iRecord is a free scheduled-recording program derived from this SDK.

Windows

There are several free DVR applications available for Microsoft Windows including GB-PVR, Got All Media[2], MediaPortal, and Orb (web-based remote interface). Microsoft Corporation is an American multinational Computer technology Corporation, which rose to dominate the Home computer Microsoft Windows is a series of Software Operating systems and Graphical user interfaces produced by Microsoft. GB-PVR is a home Media center application running on Microsoft Windows, allowing you to watch TV schedule recordings watch videos watch DVDs listen to music MediaPortal is an Open source Media center software that acts as front-end for Personal Video Recorder (PVR, video pictures music and many more functionalities Orb is a Freeware streaming software that enables users to remotely access all their personal digital media files including pictures music videos webcams and DScaler also has DVR support in the works. DScaler is an open-source video deinterlacer and scaling program for Microsoft Windows

There also are several proprietary applications available including AVS TV Box[3], CyberLink PowerCinema, SageTV, SnapStream Beyond TV, ChrisTV[4], Showshifter, Meedio (now a dead product - Yahoo! bought most of the company's technology and discontinued the Meedio line, and rebranded the software Yahoo! Go - TV, which is now a free product but only works in the U. Proprietary software is Computer software on which the producer has set restrictions on use private modification copying, or republishing. SageTV Media Center is a commercial digital video recording (DVR Software package for Mac OS X, Windows and Linux. BeyondTV is PVR / Media center software for Microsoft Windows produced by the American company SnapStream. ShowShifter is widely regarded as the original Media Center /10 foot UI/ HTPC software application but is no longer commercially available Meedio is a company (based in the United States) that made a Media center software (based on the freeware myHTPC and was acquired by Yahoo! in 2006 S. and Canada), InterVideo WinDVR, Recordit Plus and the R5000-HD. InterVideo WinDVR is a commercial digital video recorder ( DVR) software package for Windows operating systems The Nextcom R5000-HD is a popular Windows -based system for Digitally capturing HD ( high-definition) and SD (standard-definition

Windows Media Center is a DVR software by Microsoft bundled with the Media Center edition of Windows XP as well as Home Premium and Ultimate editions of Windows Vista. Windows Media Center is an application designed to serve as a home-entertainment hub. Windows XP has been released in several editions since its original release in 2001 Windows Vista (ˈvɪstə is a line of Operating systems developed by Microsoft for use on Personal computers including home and business desktops

Source video

Television and video are terms that are sometimes used interchangeably, but differ in their technical meaning. Television ( TV) is a widely used Telecommunication medium for sending ( Broadcasting) and receiving moving Images, either monochromatic Video is the technology of electronically capturing, Recording, processing storing transmitting and reconstructing a sequence of Still images Video is the visual portion of television, whereas television is the combination of video and audio modulated onto a carrier frequency (i. In Telecommunications, modulation is the process of varying a periodic Waveform, i e. , a television channel), so that the signal can be delivered to the receiver (TV or computer/PVR with a TV tuner).

Analog television

Analog television in NTSC, PAL or SECAM formats, analog cable, or regular VHS tapes use a signal that is fed directly to the electron beam within the television set. Analog (or analogue) television encodes Television picture and sound information and transmits it as an Analog signal: one in which the NTSC ( National Television System Committee) is the Analog television system used in the United States, Canada, Japan, Mexico PAL, short for Phase Alternating Line, is a colour -encoding system used in Broadcast television systems in large parts of the world SECAM, also written SÉCAM ( Séquentiel couleur à mémoire, French for "Sequential Color with Memory" is an analog color television system Cathode rays (also called an electron beam or e-beam) are streams of Electrons observed in Vacuum tubes i Television ( TV) is a widely used Telecommunication medium for sending ( Broadcasting) and receiving moving Images, either monochromatic There are a number of details on how this is done, but in essence each line in each frame corresponds to a specific fraction of time within the signal.

To record an analog signal a few steps are required. A TV tuner card tunes into a particular frequency and then functions as a frame grabber, breaking the lines into individual pixels and quantizing them into a format that a computer can comprehend. A TV tuner card is a computer component that allows Television signals to be received by a Computer. A tuner is an adjustable device which passes one Radio Frequency, or band of frequencies and excludes others by using electrical Resonance. A frame grabber is an electronic device that captures individual digital still frames from an analog video signal or a digital video stream In Digital signal processing, quantization is the process of approximating a continuous range of values (or a very large set of possible discrete values by a relatively-small Then the series of frames along with the audio (also sampled and quantized) are compressed into a manageable format, like MPEG-2, or WMF, usually in software. In Signal processing, sampling is the reduction of a Continuous signal to a Discrete signal. MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information" Windows Media is a Multimedia framework for media creation and distribution for Microsoft Windows. Some TV tuner cards like the DVR-250/350 or the TiVo chip deliver an MPEG-2 or other compressed stream directly to the computer, performing both the frame grabbing and compression in hardware. IVTV is a driver for Linux / UNIX systems to allow them to use certain video capture cards that make use of on-board MPEG-1 / MPEG-2 Encoders This greatly reduces the load on the CPU allowing an overall cheaper implementation. In UNIX Computing, the system load is a measure of the amount of work that a computer system is doing

Analog broadcast copy protection

Many mass-produced consumer DVRs implement a copy-protection system called CGMS-A or Copy Generation Management System--Analog. Copy Generation Management System - Analog ( CGMS-A) is a Copy protection mechanism for analog Television signals This encodes a pair of bits in the VBI of the analog video signal that specify one of the following settings:

CGMS-A information may be present in analog broadcast TV signals, and is preserved when the signal is recorded and played back by analog VCRs, which of course don't understand the meanings of the bits. PLEASE BEAR IN MIND THAT THIS IS A GENERAL ARTICLE ABOUT VCRs/VIDEOCASSETTE RECORDERS But the restrictions still come into effect when you try to copy the tape onto a PVR.

Digital television

Digital television contains audio/visual signals that are broadcast over the air in a digital rather than analog format. Digital television (DTV is the sending and receiving of moving images and sound by discrete ( digital) signals in contrast to the analog signals used by A digital system uses discrete (discontinuous values usually but not always Symbolized Numerically (hence called "digital" to represent information for An analog or analogue signal is any continuous signal for which the time varying feature (variable of the signal is a representation of some other Recording digital TV is generally a straightforward capture of the binary MPEG-2 data being received. MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information" No expensive hardware is required to quantize and compress the signal (as the television broadcaster has already done this in the studio). compress is a UNIX compression program based on the LZC compression method which is an LZW implementation using variable size pointers as in For the band see Broadcast (band Broadcasting is the distribution of audio and/or Video signals which transmit The MythTV DVR supports both international DVB signals and American ATSC signals while the TiVo Series 3 supports only the ATSC signals. MythTV is a free Unix application which turns a computer with the necessary hardware into a network streaming Digital video recorder For the chemical compound see Divinylbenzene. Digital Video Broadcasting ( DVB) is a suite of internationally accepted In the U.S., the FCC attempted to limit the abilities of digital DVRs with its "broadcast flag" regulation. The United States of America —commonly referred to as the A broadcast flag is a set of status Bits (or a " flag " sent in the data stream of a Digital television program that indicates whether or not the Digital video recorders that had not won prior approval from the FCC for implementing "effective" digital rights management would have been banned from interstate commerce as of July 2005. Digital rights management ( DRM) is a generic term that refers to Access control technologies used by hardware manufacturers publishers and Copyright holders Article 1 Section 8 Clause 3 of the United States Constitution, known as the Commerce Clause, states that Congress has the power to regulate commerce with foreign The regulation was struck down on May 6, 2005. Events 1527 - Spanish and German troops sack Rome; some consider this the end of the Renaissance. Year 2005 ( MMV) was a Common year starting on Saturday (link displays full calendar of the Gregorian calendar.

DVD-based PVRs available on the market as of 2006 are not capable of capturing the full range of the visual signal available with high definition television (HDTV). High-definition television (HDTV is a Digital television Broadcasting system with higher resolution than traditional television systems (standard-definition This is largely because HDTV standards were finalized at a later time than the standards for DVDs. However, DVD-based PVRs can still be used (albeit at reduced visual quality) with HDTV since currently available HDTV sets also have standard A/V connections.

Satellite or digital cable

Recording satellite or digital cable signals on a digital video recorder is more complex than recording analog signals or broadcast digital signals. This article is about artificial satellites For natural satellites also known as moons see Natural satellite. Digital cable is a type of Cable television distribution using Digital Video compression. This is so because the MPEG-2 or MPEG-4 stream is usually encrypted to prevent people from viewing the content without paying for it (usually via subscription). MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information" MPEG-4 is a collection of methods defining compression of audio and visual (AV digital data

The satellite or cable set-top box does two things. A set-top box (STB or set-top unit (STU is a device that connects to a Television and an external source of signal, turning the signal into First, it decrypts the signal. Second, it decodes the MPEG stream into an analog, DVI, or HDMI signal for viewing on the television. The High-Definition Multimedia Interface ( HDMI) is a compact audio/video connector interface for transmitting uncompressed digital streams In order to record cable/satellite digital signals you must get the signal after it is decrypted, but before it is decoded (between steps one and two); this is how DVRs built into set-top boxes work.

An alternative is that some satellite or (more commonly) cable set-top boxes have a FireWire port that can be connected to a computer. The IEEE 1394 interface is a serial bus Interface standard for high-speed communications and Isochronous real-time data transfer frequently The recorded MPEG stream can be relayed to the computer via this FireWire port; though it can be done live, this is more commonly used for transferring shows from a set-top box with built-in DVR. (For instructions on doing this on a popular set-top box with DVR, please see the Wikibook entry How to use a Motorola DVR; some of the ideas there may apply to other set-top boxes as well. )

DVD

Many DVD-based DVRs are equipped with two DVD drives or an additional internal hard drive. This arrangement can be used to copy content from a source DVD, which is disallowed in the U. S. under the Digital Millennium Copyright Act if the disc is encrypted. The Digital Millennium Copyright Act (DMCA is a United States Copyright Law which implements two 1996 treaties of the World Intellectual Property Most such DVRs will hence not allow recording of video streams from encrypted movie discs.

Digital camcorders

Some DVD-based DVRs incorporate a Firewire connector which can be used to capture digital video from a MiniDV or Digital 8 camcorder, possibly recording a simple DVD as the camcorder is played back. The IEEE 1394 interface is a serial bus Interface standard for high-speed communications and Isochronous real-time data transfer frequently Digital Video (DV is a Digital video format created by Sony JVC Panasonic and other video camera procuers and launched in 1995 and in its smaller tape Form factor Some editing of the resulting DVD is usually possible, such as adding chapter points.

Security applications

Digital video recorders configured for physical security applications record video signals from closed circuit television cameras for detection and documentation purposes. Physical security describes measures that prevent or deter Attackers from accessing a facility resource or information stored on physical media Closed-circuit television ( CCTV) is the use of Video cameras to transmit a signal to a specific place limited set of monitors Many are designed to record audio as well. DVRs have evolved into devices that are feature rich and provide services that exceed the simple recording of video images that was previously done through VCRs. A DVR CCTV system provides a multitude of advanced functions over VCR technology including video searches by event, time, date and camera. There is also much more control over quality and frame rate allowing disk space usage to be optimized and the DVR can also be set to overwrite the oldest security footage should the disk become full. In some DVR security systems remote access to security footage using a PC can also be achieved by connecting the DVR to a LAN network or the internet.

Security DVRs may be categorized as being either PC based or embedded. An embedded system is a special-purpose Computer system designed to perform one or a few dedicated functions often with Real-time computing constraints A PC based DVR’s architecture is a classical personal computer with video capture cards designed to capture video images. A Video processing expansion card is a computer Expansion card that allows a computer to receive television signals record video and/or playback video content An embedded type DVR is specifically designed as a digital video recorder with its operating system and application software contained in firmware or read only memory. An operating system (commonly abbreviated OS and O/S) is the software component of a Computer system that is responsible for the management and coordination Application software is a subclass of Computer software that employs the capabilities of a computer directly and thoroughly to a task that the user wishes to perform In Computing, firmware is a computer program that is Embedded in a hardware device for example a Microcontroller.

Hardware features

Hardware features of security DVRs vary between manufacturers and may include but are not necessarily limited to

Software features

Software features vary between manufacturers and may include but are not necessarily limited to

Privacy concerns

It is possible when providing DVR service to gather real time data on user's viewing habits. [9]

Limitations

Digital video recorders cannot record from a high definition digital audio/video source such as HDMI or DVI, due to restrictions imposed by High Definition Content protection (hdcp)

Patent litigation

On July 14, 2005, Forgent Networks filed suit[5] against various companies alleging infringement on U.S. Patent 6,285,746 , entitled "Computer controlled video system allowing playback during recording". High-bandwidth Digital Content Protection ( HDCP) is a form of digital Copy protection developed by Intel Corporation to prevent copying of digital audio Events 1223 - Louis VIII becomes King of France upon the death of his father Philip II of France. Year 2005 ( MMV) was a Common year starting on Saturday (link displays full calendar of the Gregorian calendar. Asure Software ( is a Software company which has licensing as its primary revenue source The listed companies included EchoStar, Directv, Charter Communications, Cox Communications, Comcast, Time Warner, and Cable One.

Scientific-Atlanta and Motorola, the manufacturers of the equipment sold by the above mentioned companies, filed a counter-suit against Forgent Networks claiming that their products do not violate the patent, and that the patent is invalid. Scientific Atlanta Inc, a Cisco company is a Georgia -based manufacturer of Cable television, Telecommunications, and Broadband Motorola Inc ( is an American, multinational Fortune 100, Telecommunications company based in Schaumburg Illinois. The two cases were combined into case 6:06-cv-208, filed in the United States District Court for the Eastern District of Texas, Tyler Division.

According to court documents, on June 20, 2006, Motorola requested that the United States Patent and Trademarks Office reexamine the patent, which was first filed in 1991, but has been amended several times. Events 451 - Battle of Chalons: Flavius Aetius ' defeats Attila the Hun. Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. [6]

On March 23, 2007 Cablevision Systems Corp lost a legal battle against several Hollywood studios and television networks to introduce a network-based digital video recorder service to its subscribers. Events 1174 - Jocelin, Abbot of Melrose, is elected Bishop of Glasgow. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. [7]

See also

References

  1. ^ "TiVo’s Blue Moon holiday — a walk down memory lane"
  2. ^ http://www.microsoft.com/presspass/press/1999/jan99/echostarpr.mspx "WebTV Networks and EchoStar Communications Introduce First Internet TV Satellite Product and Service"
  3. ^ "EchoStar Debuts DISHPlayer"
  4. ^ http://www.microsoft.com/presspass/press/1999/jan99/echostarpr.mspx "WebTV Networks and EchoStar Communications Introduce First Internet TV Satellite Product and Service"
  5. ^ http://www.forbes.com/forbes/2001/0611/146.html "Forbes"
  6. ^ SatelliteGuys.US - View Single Post - Judge Stops Countersuit against TiVo
  7. ^ WIldstrom, W. Direct to disk recording refers to methods by which digital audio and video are recorded to portable storage media such as Hard drives and DVDs Direct to disk can The following is a comparison guide for popular DVR (PVR software packages D-VHS is a Digital video format developed by JVC, in collaboration with Hitachi, Matsushita, and Philips. A DVD recorder (also known as a DVDR mainly outside of the UK and Ireland is an Optical disc recorder that records video onto blank writeable DVD media A hard disk recorder is a type of recording system that utilizes a high-capacity Hard disk to record Digital audio or Digital video. A Home Theater PC ( HTPC) or media PC is a convergence device that combines the functions of a Personal computer and a Digital video recorder. NDS Group plc ( is a DRM and Conditional access firm Its major shareholder is News Corporation. ReplayTV is a brand of Digital video recorder (DVR a term synonymous with personal video recorder (PVR Sky+, or Sky Plus, is a Personal video recorder (PVR service for Sky Digital, and is very similar in principle to the TiVo service (which TiVo (pronounced ˈtiːvoʊ is a brand of Digital video recorder (DVR in the United States, Canada, and Australia created by TiVo The Moxi Media center is a mediocre electronic device that allows users to record television programming to an internal hard drive for reviewing at a later time MythTV is a free Unix application which turns a computer with the necessary hardware into a network streaming Digital video recorder DVRs or Digital Video Recorders are devices which record video to a hard drive H. : "An Early Independence Day."
  8. ^ "FCC Press Release"
  9. ^ Martin, David: "TiVo's Data Collection and Privacy Practices." 26 March 2001. Last Viewed 18 September 2007.

External links

Dictionary

digital video recorder

-noun

  1. (television) a personal video recorder
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