![]() ![]() ![]() However, while it is generally possible to flash a card from one analog format to another due to the similarities, it is generally not possible to flash a card from one digital format to another due to differences in decode logic necessary. ![]() Many newer TV tuners have flash memory big enough to hold the firmware sets for decoding several different video formats, making it possible to use the tuner in many countries without having to flash the firmware. While most TV tuners are limited to the radio frequencies and video formats used in the country of sale, many TV tuners used in computers use DSP, so a firmware upgrade is often all that's necessary to change the supported video format. These small tuners generally do not have hardware encoding due to size and heat constraints. Small USB tuner sticks have become more popular in 20 and are expected to increase in popularity. The tuner cards with this 'hardware encoding' are generally thought of as being higher quality. Like the analog cards, the Hybrid and Combo tuners can have specialized chips on the tuner card to perform the encoding, or leave this task to the CPU. As many regions around the world convert from analog to digital broadcasts, these tuners are gaining popularity. The advantages over two separate cards are cost and utilization of expansion slots in the computer. The card operates as an analog tuner and a digital tuner simultaneously. One can watch analog while recording digital, or vice versa. This is similar to a hybrid tuner, except there are two separate tuners on the card. ![]() The card operates as a digital tuner or an analog tuner until reconfigured. Switching between the systems is fairly easy, but cannot be done immediately. More-advanced TV tuners encode the signal to Motion JPEG or MPEG, relieving the main CPU of this load.Ī hybrid tuner has one tuner that can be configured to act as an analog tuner or a digital tuner. MicroTV for Apple Macintosh II, which debuted in 1989. Some cards also have analog input ( composite video or S-Video) and many also provide a radio tuner.Īn early example was the Aapps Corp. Some lower-end cards lack an onboard processor and, like a Winmodem, rely on the system's CPU for demodulation.Īnalog television cards output a raw video stream, suitable for real-time viewing but ideally requiring some sort of video compression if it is to be recorded. The card contains a tuner and an analog-to-digital converter (collectively known as the analog front end) along with demodulation and interface logic. In addition, some video cards double as TV tuners, notably the ATI All-In-Wonder series. The interfaces for TV tuner cards are most commonly either PCI bus expansion card or the newer PCI Express (PCIe) bus for many modern cards, but PCMCIA, ExpressCard, or USB devices also exist. Most TV tuners also function as video capture cards, allowing them to record television programs onto a hard disk much like the digital video recorder (DVR) does.Ī DVB-S2 tuner card D-Link external TV tuner ( Learn how and when to remove this template message)Ī TV tuner card is a kind of television tuner that allows television signals to be received by a computer. ( February 2012) ( Learn how and when to remove this template message) Please try to keep recent events in historical perspective and add more content related to non-recent events. This article or section appears to be slanted towards recent events. ![]()
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