GS1503 Gennum Corporation, GS1503 Datasheet - Page 28

• Manufacturer Part Number: GS1503
• Description: HD Embedded Audio Codec
• Manufacturer: Gennum Corporation

When CASCADE is set LOW, the GS1503 will multiplex
audio data and control packets as shown in Figure 25
(NOTE: Only the Chroma channel of the video data stream
is shown). Any existing audio data or control packets will be
deleted and replaced with blanking data before the new
packets are multiplexed. New packets are multiplexed
immediately after the two video line CRC words.
Video Signal after GS1503 Insertion of Audio Groups 1 & 2 (CASCADE = 0)
Video Signal after GS1503 Insertion of Audio Groups 3 & 4 (CASCADE = 1)
Video Signal before GS1503 (with existing Audio Data Packets)
Video Signal before GS1503 (with existing Audio Data Packets)
Video Signal before GS1503 (no existing Audio Data Packets)
Fig. 25
Fig. 26
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When CASCADE is set HIGH, the GS1503 will multiplex the
audio data and control packets immediately after the
existing packets, as shown in Figure 26. Avoid multiplexing
new ancillary data packets with the same audio group DID
as existing packets.
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