|
The digital video recorder (DVR), also called personal video recorder (PVR) or digital personal video recorder, is a consumer electronics device that records television shows to a hard disk in digital format. The first disk recording of television was tested on July 8th, 1965, when CBS explored the possibilities of instant freeze-frame and rewind for sporting event broadcasts. Ampex released the first commercial hard disk video recorder in 1967. The HS-100 recorded analog video onto a digital hard disk and could store a maximum of 30 seconds. Consumer electronics is electronic equipment intended for use by everyday people. ...
Typical hard drives of the mid-1990s. ...
Ampex is based in Redwood City, California. ...
The two earliest consumer DVRs, ReplayTV and TiVo, were launched at the 1999 Consumer Electronics Show in Las Vegas. Ironically, 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, or web browsers. ReplayTV is a brand of digital video recorder (DVR), a term synonymous with personal video recorder (PVR). ...
Jump to: navigation, search DVD is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ...
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, and skipping advertising. Most DVR recorders use the MPEG format for encoding analog video signals. Time shifting is the recording of television shows to some storage medium to be viewed at a time convenient to the consumer. ...
The video cassette recorder (or VCR, less popularly video tape recorder) is a type of video tape recorder that uses removable cassettes containing magnetic tape to record audio and video from a television broadcast so it can be played back later. ...
Jump to: navigation, search Generally speaking, advertising is the paid promotion of goods, services, companies and ideas by an identified sponsor. ...
The Moving Picture Experts Group or MPEG is a working group of ISO/IEC charged with the development of video and audio encoding standards. ...
The most popular DVRs on the market in the United States are the TiVo and DNNA's ReplayTV, although most home electronics manufacturers now offer models. In the UK Sky Plus dominates the digital satellite market, though TiVO have a small presence; Thomson, Fusion, Pace and Humax also supply digital terrestrial (DTT) DVRs. Many satellite and cable companies are incorporating DVR functions into their set-top box, such as with DirecTiVo, 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 Plus. In this case there is no encoding necessary in the DVR, as the satellite signal is already a digitally encoded MPEG stream. The DVR simply stores the digital stream directly to disk. Having the broadcaster involved with (subsidizing) the design of the DVR, and directly recording encrypted digital streams can lead to fancy features - like the ability to use interactive TV on recorded shows, pre-loading of programs; but can also lead to too much control by the broadcaster - like denying the ability to skip adverts and automatically expiring recordings after a time determined by the broadcaster. TiVo (tÄ“-vÅ) is a popular brand of digital video recorder (DVR), a term synonymous with personal video recorder (PVR). ...
ReplayTV is a brand of digital video recorder (DVR), a term synonymous with personal video recorder (PVR). ...
Sky Digital is the brand name for British Sky Broadcastings digital satellite television service, transmitted from SES Astra satellites located at 28. ...
DTT is a three-letter abbreviation for: Digital Terrestrial Television Deloitte Touche Tohmatsu This page concerning a three-letter acronym or abbreviation is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
The term set-top box describes a device that connects to a television and some external source of signal, and turns the signal into content then displayed on the screen. ...
DirecTiVo is an informal term for the implemented combination of DIRECTV satellite television programming service and the TiVo digital video recorder service. ...
The Motorola 6000 series of HDTV cable boxes includes several models: Motorola 6200: HDTV Cable Box with no recording capabilities Motorola 6208: Single tuner box with 80 GB hard drive Motorola 6412: Dual tuner box with 120 GB hard drive ...
Moxi is a PVR from Digeo, Inc. ...
Other entrants into the market include products such as Microsoft's Media Center. Jump to: navigation, search Microsoft Corporation (NASDAQ: MSFT) is the worlds largest software company, with global annual sales in the tens of billions of US dollars and nearly 60,000 employees in more than 90 countries. ...
Jump to: navigation, search A typical Windows Media Center Edition 2005 Menu Windows XP Media Center Edition (codename eHome) is a version of Windows XP designed to serve as a home entertainment hub. ...
In 2003, the Yakima, Washington Police Department began using DVRs in their patrol cars to record the activities of officers and suspects. Since then, many other police departments have followed suit, due to the increased reliability and decreased cost compared to analog video systems. 2003(MMIII) is a common year starting on Wednesday of the Gregorian calendar. ...
City seal Yakima is a city in central Washington and the county seat of Yakima County, USA. As of the 2000 census, the city had a total population of 71,845. ...
Constables of the Metropolitan Police Royal Canadian Mounted Police A police car of the Saarland Police, Germany Police forces are government organisations charged with the responsibility of maintaining law and order. ...
There are ways to make one's own DVR using software and hardware available for Microsoft Windows, Linux and Macintosh operating systems. There are even people working on turning the Xbox into a DVR with a modchip. Jump to: navigation, search Microsoft Windows is a range of operating environments for personal computers and servers. ...
Jump to: navigation, search Tux, a cartoon penguin frequently featured sitting, is the official Linux mascot. ...
Original 1984 Mac OS desktop Current 2005 Mac OS X desktop Mac OS, which stands for Macintosh Operating System, is Apple Computer’s name for the first operating systems for Macintosh computers. ...
The Xbox is Microsofts first game console, released on November 15, 2001. ...
A modification chip or modchip is a device used to play import, backup, or homebrew games and/or circumvent the digital rights management of many popular game consoles, including the Xbox and PlayStation. ...
How a digital video recorder works
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. 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. Analog television encodes picture information by varying the voltages and/or frequency of the signal. ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
For other meanings of PAL see PAL (disambiguation). ...
SÉCAM (Séquentiel couleur à mémoire, French for sequential colour with memory) is an analog color television system first used in France. ...
Jump to: navigation, search Top view VHS cassette with US Quarter for scale Bottom view of VHS cassette with magnetic tape exposed The Video Home System, first released in 1976, better known by its acronym VHS, is a recording and playing standard for video cassette recorders (VCRs), developed by JVC...
A charged particle beam is a group of electrically charged particles that have approximately the same kinetic energy and move in approximately the same direction. ...
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. 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. 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 silico. This greatly reduces the load on the CPU allowing an overall cheaper implementation. tv-card A TV tuner card is a computer component that allows television signals to be received by a computer. ...
The Sansui TU-X1, considered by many the mother of all stereo FM tuners. A tuner is an adjustable device which passes one radio frequency, or band of frequencies, and excludes others, by using electrical resonance. ...
Quantization of x using Q(x) = floor(Lx)/L. In digital signal processing, quantization is the process of approximating a continuous signal by a set of discrete symbols or integer values; that is, converting an analog signal to a digital one via analog-to-digital conversion. ...
A sample refers to a value or set of values at a point in time and/or space. ...
Jump to: navigation, search MPEG-2 (1994) is the designation for a group of coding standards for digital audio and video, agreed upon by MPEG (Moving Pictures Experts Group), and published as the ISO/IEC 13818 international standard. ...
What is IVTV ? The primary goal of the IVTV project is to provide a clean room Linux Open Source driver implementation for video capture cards based on the iCompression iTVC15 or Conexant CX23415/CX23416 MPEG codec. ...
in silico is an expression used to mean performed on computer or via computer simulation. ...
Load, in computing, is a measure of the amount of processing a computer system is currently performing, usually in the form of a scalar and as some variation on a percentage. ...
Analog Broadcast Copy Protection Many mass-produced consumer DVRs implement a copy-protection system called CGMS-A (Copy Generation Management System--Analog). This encodes a pair of bits in the VBI of the analog video signal that specify one of the following settings: The vertical blanking interval (VBI) is an interval in a television or VDU signal that temporarily suspends transmission of the signal for the electron gun to move back up to the first line of the television screen to trace the next screen field. ...
- Copying is freely allowed
- Copying is prohibited
- Only one copy of this material may be made
- This is a copy of material for which only one copy was allowed to be made, so no further copies are allowed.
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. But the restrictions still come into effect when you try to copy the tape onto a PVR. The video cassette recorder (or VCR, less popularly video tape recorder) is a type of video tape recorder that uses removable cassettes containing magnetic tape to record audio and video from a television broadcast so it can be played back later. ...
Digital television Digital television are audio/visual signals that are broadcast over the air in a digital rather than analog format. Recording digital TV is generally a straightforward capture of the binary MPEG-2 data being received. No expensive hardware is required to quantize and compress the signal (as the television broadcaster has already done this in the studio). The MythTV DVR supports both European DVB signals and American ATSC signals while the HDTV Tivo supports the ATSC signals. In the US, the FCC attempted to place a road-block before digital DVRs with its "Broadcast flag" regulation. Digital video recorders which had not won prior approval from the FCC for implementing "effective" digital restrictions management would have been banned from interstate commerce as of July 2005. The regulation was struck down on 6 May 2005. Digital television (DTV) uses digital modulation and compression to broadcast video, audio and data signals to television sets. ...
Jump to: navigation, search A digital system is one that uses numbers, especially binary numbers, for input, processing, transmission, storage, or display, rather than a continuous spectrum of values (an analog system) or non-numeric symbols such as letters or icons. ...
An analog or analogue signal is any continuously variable signal. ...
Jump to: navigation, search MPEG-2 (1994) is the designation for a group of coding standards for digital audio and video, agreed upon by MPEG (Moving Pictures Experts Group), and published as the ISO/IEC 13818 international standard. ...
Generally, quantization is the state of being constrained to a set of discrete values, rather than varying continuously. ...
Categories: Disambiguation | Software stubs | Data compression software ...
Broadcasting is the distribution of audio and video signals (programs) to a number of recipients (listeners or viewers) that belong to a large group. ...
MythTV is a GPL open source application for Linux designed to allow any computer (that meets the specified minimum requirements) to function as a personal video recorder. ...
Jump to: navigation, search DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 300 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee...
The Advanced Television Systems Committee (ATSC) is the group that helped to develop the new digital television standard for the United States, also adopted by Canada, Mexico, and South Korea and being considered by other countries. ...
Wikiquote has a collection of quotations by or about: United States Wikinews has news related to this article: United States United States government CIA World Factbook Entry for United States House. ...
The FCCs official seal. ...
A broadcast flag is a set of status bits (or flags) sent in the data stream of a digital television program that indicates whether or not it can be recorded, or if there are any restrictions on recorded content. ...
The acronym DRM can stand for: Digital rights management, also called Digital Restrictions Management Digital Radio Mondiale Direct Rendering Manager is a Linux kernel module that gives direct hardware access to DRI clients. ...
Article I, Section 8, Clause 3 of the United States Constitution empowers the United States Congress To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes. The Commerce Clause has been the subject of intense constitutional and political disagreement centering on the extent to...
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 is so because the MPEG-2 stream is usually encrypted to prevent people from viewing the content without paying for it (usually via subscription to a valid satellite decryption box and a decoder card). Jump to: navigation, search A satellite is any object that orbits another object (which is known as its primary). ...
Digital cable is a term for a type of cable digital television that delivers more channels than possible with analog cable by using digital video compression. ...
Jump to: navigation, search MPEG-2 (1994) is the designation for a group of coding standards for digital audio and video, agreed upon by MPEG (Moving Pictures Experts Group), and published as the ISO/IEC 13818 international standard. ...
The satellite or cable decoder box does two things. First it decrypts the signal. Second, it decodes the MPEG-2 stream into an analog signal for play on the television. In order to record cable/satellite digital signals you would need to get the signal after it is decrypted but before it is decoded (between steps one and two).
An alternative is that some satellite/cable decoder boxes have a firewire port that can be connected to a computer. The MPEG stream could be relayed to the computer via this firewire port although there is as yet few, if any, current cards or devices that allow for a firewire connection to the computer from this box. A 6-Pin FireWire 400 connector FireWire (also known as i. ...
DVR software There is DVR software available for Linux and Windows for people who make their own homemade recorders. Jump to: navigation, search Tux, a cartoon penguin frequently featured sitting, is the official Linux mascot. ...
Jump to: navigation, search Microsoft Windows is a range of operating environments for personal computers and servers. ...
Linux The three main DVR applications for Linux are VDR, MythTV and Freevo all of which are GPL open source software. Jump to: navigation, search Tux, a cartoon penguin frequently featured sitting, is the official Linux mascot. ...
MythTV is a GPL open source application for Linux designed to allow any computer (that meets the specified minimum requirements) to function as a personal video recorder. ...
Freevo is a GPL open source application for Linux and BSD designed to run a homemade personal video recorder. ...
The GNU logo For other uses of GPL, see GPL (disambiguation). ...
Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ...
Macintosh Elgato makes a series of DVR devices called EyeTV (400 / 500 / DTT etc.). The software supplied with each device (but available separately) is also called EyeTV.
Windows Microsoft Windows has several free DVR applications including GB-PVR and MediaPortal. Jump to: navigation, search Microsoft Corporation (NASDAQ: MSFT) is the worlds largest software company, with global annual sales in the tens of billions of US dollars and nearly 60,000 employees in more than 90 countries. ...
Jump to: navigation, search Microsoft Windows is a range of operating environments for personal computers and servers. ...
GB-PVR is a free Personal Video Recorder (PVR) software program for Microsoft Windows that allows a computers TV tuner card to be used to record and pause live TV, much like a PVR box such as TiVo. ...
MediaPortal is a free, open source Personal Video Recorder (PVR) software program for Microsoft Windows that allows a computers TV tuner card to be used to record and pause live TV, much like a PVR box such as TiVo. ...
There also are several proprietary applications including SageTV, SnapStream Beyond TV, ChrisTV, Showshifter, Meedio, InterVideo WinDVR and Recordit Plus. Jump to: navigation, search Proprietary indicates that a party exercises private ownership, control or use over an item of property, usually to the exclusion of other parties. ...
SnapStreams Beyond TV software lets you convert your Windows PC into a Personal Video Recorder enabling it to perform functions like the popular TiVo set-top box. ...
There is also a separate version of Microsoft Windows called Windows XP Media Center Edition which has DVR capabilities. Jump to: navigation, search A typical Windows Media Center Edition 2005 Menu Windows XP Media Center Edition (codename eHome) is a version of Windows XP designed to serve as a home entertainment hub. ...
See also 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 DVD recorder is a consumer electronics device that records analog or digital audio/visual (A/V) signals in a digital format onto a digital video disc (DVD). ...
MythTV is a GPL open source application for Linux designed to allow any computer (that meets the specified minimum requirements) to function as a personal video recorder. ...
Freevo is a GPL open source application for Linux and BSD designed to run a homemade personal video recorder. ...
MediaPortal is a free, open source Personal Video Recorder (PVR) software program for Microsoft Windows that allows a computers TV tuner card to be used to record and pause live TV, much like a PVR box such as TiVo. ...
GB-PVR is a free Personal Video Recorder (PVR) software program for Microsoft Windows that allows a computers TV tuner card to be used to record and pause live TV, much like a PVR box such as TiVo. ...
External links |
Feeds |
Contact