GS1503 Gennum Corporation, GS1503 Datasheet - Page 29
![no-image](/images/manufacturer_photos/0/2/277/gennum_corporation_sml.jpg)
GS1503
Manufacturer Part Number
GS1503
Description
HD Embedded Audio Codec
Manufacturer
Gennum Corporation
Datasheet
1.GS1503.pdf
(82 pages)
- Current page: 29 of 82
- Download datasheet (2Mb)
The GS1503 assumes that the ancillary data space from the
first blanking location to the SAV contains no ancillary data
packets.
Existing
ancillary
data
packets
must
be
contiguous from the beginning of the HANC space or the
GS1503 will overwrite existing packets with blanking before
multiplexing new packets. See Figure 27.
Blank
Blank (200 h )
(200 h )
Video Signal before GS1503 (with space between EAV and existing Audio Data Packets)
Blank (200 h )
Video Signal after GS1503 Insertion of Audio Groups 3 & 4 (CASCADE = 1)
Fig. 27
1.10 AUDIO CONTROL PACKETS
1.10.1 Audio Control Packet Structure
Figure 28 shows the structure of the audio control packet as
defined in SMPTE 299M. An audio control packet is
multiplexed once per field in the Luma channel of the video
data stream. Table 6 lists descriptions of the individual
audio control packet words. The GS1503 will automatically
generate certain audio control packet words.
User Data Words
Fig. 28 Audio Control Packet Structure
29
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