What are the problems with digital audio?
As with many areas of technology, there is no single standard for digital audio.
It can be presented in various standards: AES / EBU 110 Ohm, AES-ID3 75 Ohm, S / PDIF 75 Ohm, Optical Toslink, among others. The sampling frequency can be from 32 kHz to 192 kHz with different bit depths. To work with all the variety of standards in a serious studio, you need to have an interface unit, better a digital audio converter or a sample rate converter.
What are the problems with digital video?
Digital video (SDI) is similar in some respects to analog video. In it, the quality of the cables and connectors is also important for normal operation, the loss of high frequencies of the signal in them also affects the quality of the signal. Due to many factors that affect the analog signal, fluctuations can appear in digital systems, at a certain level of which there is a complete blockage of the image (clipping effect *). A little lost in digital video can have far more serious consequences than a pixel lost in analog. When working with digital video, restoration of signal quality (equalization of the frequency spectrum and restoration of clock frequency) is often required. The format (“language”) of a digital signal is very important for its correct transmission, since the transmission protocols are very specific.
Level incompatibility is a rare problem in analog technology. Digital signals, however, can have different and incompatible levels: TTL, ECL or others. Another problem with digital signals is the adaptation of the load capacity of the digital inputs and outputs, which must also be addressed.
What is the easiest way to input a digital video signal into a computer?
The easiest and cheapest way is to use a DV video source and a Firewire® card on your computer (or the built-in interface on many modern computers). The entry procedure is simple and fast. For analog video, you can use an analog video capture card or an external analog video to DV converter connected to the Firewire® card.
Why do I sometimes have difficulties with the DV format?
The digital video format that uses a DV or mini-DV cassette and Firewire® technology has a very high bit rate, which limits the length of the connecting cable. Attempting to use long cables will cause many bit stream problems, such as clipping effect * when the image is completely lost. Another problem is a consequence of two-way communication between devices connected via Firewire® and manifests itself when trying to randomly connect multiple DV devices.
What is a device for embedding (extracting) digital audio into an SDI signal?
The total digital stream of digital serial video can include multiple channels of digital audio. An SDI embedder is used to insert digital audio into an SDI signal, and an SDI embedder is used to extract digital audio from a mixed stream.
