Analog Devices SHARC ADSP-2136 Series Hardware Reference Manual page 621

Table of Contents

(64 PERIODS)

(4 CHANNELS)

Figure C-3. Packed TDM4 Mode

AES/EBU/SPDIF Formats

For this section, it is important to be familiar with serial digital applica-

tion interface standards IEC-60958, EIAJ CP-340, AES3 and AES11.

S/PDIF data is transmitted as a stream of 32-bit data words. A data frame

consists of 384 words in total, with 192 data words transmitted for the A

stereo channel, and 192 data words transmitted for the B stereo channel.

The difference between the AES/EBU and S/PDIF protocol is the channel

status bit. If the channel status bit is not set, then:

• 0 = Consumer/professional

• 1 = Normal/compressed data

• 2 = Copy prohibit/copy permit

• 3 = 2 channels/4 channels

• 5 = No pre-emphasis/pre-emphasis

There is one channel status bit in each sub-frame, (comprising of 192 bits

per audio block). This translates to 192/8 = 24 bytes available (per audio

block). The meaning of the channel status bits are as follows

ADSP-2136x SHARC Processor Hardware Reference

www.BDTIC.com/ADI

for the ADSP-21362/3/4/5/6 Processors

Audio Frame Formats