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.ĭigital tuners Hybrid tuners 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |