A TV tuner agenda is a affectionate of television tuner that allows television signals to be accustomed by a computer. Most TV tuners aswell action as video abduction cards, acceptance them to almanac television programs assimilate a harder deejay abundant like the agenda video recorder (DVR) does.
Thursday, February 16, 2012
Variants
The interfaces for TV tuner cards are a lot of frequently either PCI bus amplification agenda or the newer PCI Express (PCIe) bus for abounding avant-garde cards, but PCMCIA, ExpressCard, or USB accessories aswell exist. In addition, some video cards bifold as TV tuners, conspicuously the ATI All-In-Wonder series. The agenda contains a tuner and an analog-to-digital advocate (collectively accepted as the analog foreground end) forth with demodulation and interface logic. Some lower-end cards abridgement an onboard processor and, like a Winmodem, await on the system's CPU for demodulation.
There are currently four kinds of tuner agenda on the market:
edit Analog TV tuners
Analog television cards achievement a raw video stream, acceptable for real-time examination but alluringly acute some array of video compression if it is to be recorded. More avant-garde TV tuners encode the arresting to Motion JPEG or MPEG, abating the capital CPU of this load. Some cards aswell accept analog ascribe (composite video or S-Video) and abounding aswell accommodate a tuner (radio).
There are currently four kinds of tuner agenda on the market:
edit Analog TV tuners
Analog television cards achievement a raw video stream, acceptable for real-time examination but alluringly acute some array of video compression if it is to be recorded. More avant-garde TV tuners encode the arresting to Motion JPEG or MPEG, abating the capital CPU of this load. Some cards aswell accept analog ascribe (composite video or S-Video) and abounding aswell accommodate a tuner (radio).
Hybrid tuners
A amalgam tuner has one tuner that can be configured to act as an analog tuner or a agenda tuner. Switching amid the systems is adequately easy, but cannot be done immediately. The agenda operates as a agenda tuner or an analog tuner until reconfigured..
edit Combo tuners
This is agnate to a amalgam tuner, except there are two abstracted tuners on the card. One can watch analog while recording digital, or carnality versa. The agenda operates as an analog tuner and a agenda tuner simultaneously. The advantages over two abstracted cards are amount and appliance of amplification slots in the computer. As abounding regions about the apple catechumen from analog to agenda broadcasts, these tuners are accepting popularity.
Like the analog cards, the Amalgam and Combo tuners can accept specialized chips on the tuner agenda to accomplish the encoding, or leave this assignment to the CPU. The tuner cards with this 'hardware encoding' are about anticipation of as getting college quality.citation needed Baby USB tuner sticks accept become added accepted in 2006 and 2007 and are accepted to access in popularity. These baby tuners about do not accept accouterments encoding due to admeasurement and calefaction constraints.
While a lot of TV tuners are bound to the radio frequencies and video formats acclimated in the country of sale, abounding TV tuners acclimated in computers use DSP, so a firmware advancement is about all that's all-important to change the accurate video format. Abounding newer TV tuners accept beam anamnesis big abundant to authority the firmware sets for adaptation several altered video formats, authoritative it accessible to use the tuner in abounding countries after accepting to beam the firmware. However, while it is about accessible to beam a agenda from one analog architecture to addition due to the similarities, it is about not accessible to beam a agenda from one agenda architecture to addition due to differences in break argumentation necessary.
Many TV tuners can action as FM radios; this is because there are similarities amid advertisement television and FM radio. The FM radio spectrum is abutting to (or even inside) that acclimated by VHF earthbound TV broadcasts. And abounding advertisement television systems about the apple use FM audio. So alert to an FM radio base is artlessly a case of configuring absolute hardware.
edit Adaptable TV
External TV tuner agenda accessories are accessible for adaptable buzz handsets like the iPhone, for watching adaptable TV, via TV stations on 1seg in Japan (SoftBank), and for anon for the proprietary subscription-based MediaFLO in the U.S. (Qualcomm). There is aswell a "converter" for watching DVB-H in Europe and abroad via WiFi alive video (PacketVideo).
edit Combo tuners
This is agnate to a amalgam tuner, except there are two abstracted tuners on the card. One can watch analog while recording digital, or carnality versa. The agenda operates as an analog tuner and a agenda tuner simultaneously. The advantages over two abstracted cards are amount and appliance of amplification slots in the computer. As abounding regions about the apple catechumen from analog to agenda broadcasts, these tuners are accepting popularity.
Like the analog cards, the Amalgam and Combo tuners can accept specialized chips on the tuner agenda to accomplish the encoding, or leave this assignment to the CPU. The tuner cards with this 'hardware encoding' are about anticipation of as getting college quality.citation needed Baby USB tuner sticks accept become added accepted in 2006 and 2007 and are accepted to access in popularity. These baby tuners about do not accept accouterments encoding due to admeasurement and calefaction constraints.
While a lot of TV tuners are bound to the radio frequencies and video formats acclimated in the country of sale, abounding TV tuners acclimated in computers use DSP, so a firmware advancement is about all that's all-important to change the accurate video format. Abounding newer TV tuners accept beam anamnesis big abundant to authority the firmware sets for adaptation several altered video formats, authoritative it accessible to use the tuner in abounding countries after accepting to beam the firmware. However, while it is about accessible to beam a agenda from one analog architecture to addition due to the similarities, it is about not accessible to beam a agenda from one agenda architecture to addition due to differences in break argumentation necessary.
Many TV tuners can action as FM radios; this is because there are similarities amid advertisement television and FM radio. The FM radio spectrum is abutting to (or even inside) that acclimated by VHF earthbound TV broadcasts. And abounding advertisement television systems about the apple use FM audio. So alert to an FM radio base is artlessly a case of configuring absolute hardware.
edit Adaptable TV
External TV tuner agenda accessories are accessible for adaptable buzz handsets like the iPhone, for watching adaptable TV, via TV stations on 1seg in Japan (SoftBank), and for anon for the proprietary subscription-based MediaFLO in the U.S. (Qualcomm). There is aswell a "converter" for watching DVB-H in Europe and abroad via WiFi alive video (PacketVideo).
Video capture
Video abduction cards are a chic of video abduction accessories advised to bung anon into amplification slots in claimed computers and servers. Models from abounding manufacturers are available; all accede with one of the accepted host bus standards including PCI, newer PCI Express (PCIe) or AGP bus interfaces.
These cards about cover one or added software drivers to betrayal the cards' features, via assorted operating systems, to software applications that added action the video for specific purposes. As a class, the cards are acclimated to abduction baseband analog blended video, S-Video, and, in models able with tuners, RF articulate video. Some specialized cards abutment agenda video via agenda video supply standards including Serial Agenda Interface (SDI) and, added recently, the arising HDMI standard. These models generally abutment both accepted analogue (SD) and top analogue (HD) variants.
These cards about cover one or added software drivers to betrayal the cards' features, via assorted operating systems, to software applications that added action the video for specific purposes. As a class, the cards are acclimated to abduction baseband analog blended video, S-Video, and, in models able with tuners, RF articulate video. Some specialized cards abutment agenda video via agenda video supply standards including Serial Agenda Interface (SDI) and, added recently, the arising HDMI standard. These models generally abutment both accepted analogue (SD) and top analogue (HD) variants.
HDMI
While a lot of PCI and PCI-Express abduction accessories are committed to that purpose, AGP abduction accessories are usually included with the cartoon acclimatized on the lath as an all-in-one package. Unlike video alteration cards, these cards tend to not accept committed accouterments for processing video above the analog-to-digital conversion. Most, but not all, video abduction cards aswell abutment one or added channels of audio. New technologies acquiesce PCI-Express and HD-SDI to be implemented on video abduction cards at lower costs than before.
There are abounding applications for video abduction cards including converting a reside analog antecedent into some blazon of analog or agenda media, (such as a VHS band to a DVD), archiving, video editing, appointed recording (such as a DVR), television tuning, or video surveillance. The cards may accept decidedly altered designs to optimally abutment anniversary of these functions.
One of the a lot of accepted applications for video abduction cards is to abduction video and audio for reside Internet video streaming. The reside beck can aswell be accompanying archived and formatted for video on demand. The abduction cards acclimated for this purpose are about purchased, installed, and configured in host PC systems by hobbyists or systems integrators. Some affliction is appropriate to baddest acceptable host systems for video encoding, decidedly HD applications which are added afflicted by CPU performance, amount of CPU cores, and assertive motherboard characteristics that heavily access abduction performance.
USB abduction accessories can be addition low price, simple to set up, and accordant option.
There are abounding applications for video abduction cards including converting a reside analog antecedent into some blazon of analog or agenda media, (such as a VHS band to a DVD), archiving, video editing, appointed recording (such as a DVR), television tuning, or video surveillance. The cards may accept decidedly altered designs to optimally abutment anniversary of these functions.
One of the a lot of accepted applications for video abduction cards is to abduction video and audio for reside Internet video streaming. The reside beck can aswell be accompanying archived and formatted for video on demand. The abduction cards acclimated for this purpose are about purchased, installed, and configured in host PC systems by hobbyists or systems integrators. Some affliction is appropriate to baddest acceptable host systems for video encoding, decidedly HD applications which are added afflicted by CPU performance, amount of CPU cores, and assertive motherboard characteristics that heavily access abduction performance.
USB abduction accessories can be addition low price, simple to set up, and accordant option.
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