![]() ![]() As Wordlength increased from 16, to 32, to 64 bits the advantages of serial transmission became even greater. Technology advanced and as the speed of circuitry increased it became commonplace for digital systems to use high-speed serial transmission with the obvious advantage of fewer conductors needed to move the data from device to device. With reasonable care to use of the proper cable and termination cable reflections (one of the main sources of jitter) have the time to decay before the next transition occurs which is not the case with serial formats. In other systems the left and right channel's digital audio data was transmitted in a serial manner, in parallel with a Word Clock signal which was used to synchronize the receiver with the beginning of the transmission of each serial word.Īs digital audio systems grew in complexity and the need for synchronization with video equipment arose, Word Clock was used as the system "clock" even though newer formats, such as the AES3 digital audio format were "self-clocking."ĭue to the fact that the Word Clock format is a relatively low frequency signal compared to the serial formats with an embedded bit clock, with two transitions per sample period as versus hundreds of transitions per sample period the Word Clock signal did offer advantages in terms of jitter issues. Some were parallel in which case each bit was carried on a separate conductor and a Word Clock signal was used to synchronize the timing of the transmission of each complete word of 16 bits, once per sample period. The signal is typically “TTL level” which is nominally 5 volt p-p and is carried on 75 Ohm coaxial cable with BNC connectors.Įarlier digital audio systems employed a number of formats of interconnection, many of which were proprietary. The term "Word Clock" is used to describe a one cycle per sample period "square wave" signal used for synchronization of digital audio equipment.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |