GS1503B Gennum Corporation, GS1503B Datasheet - Page 52

• Manufacturer Part Number: GS1503B
• Description: Hd Embedded Audio Codec
• Manufacturer: Gennum Corporation

5. Demultiplex Mode
5.1 Functional Overview
The GS1503B HD Embedded Audio CODEC fully supports the demultiplexing of
Audio Data Packets, Audio Control Packets and Arbitrary Data Packets as per
SMPTE 291M and 299M. The device can be configured to operate with all video
standards defined in SMPTE 292M, levels A through M. The GS1503B also
supports the 1080/24PsF, 25PsF and 30PsF video formats as described in SMPTE
RP211.
The video input format can be one of the following configurations:
•
•
The video output format can be one of the following configurations:
•
•
Up to a maximum of 8 channels of 48kHz digital audio can be demultiplexed per
device. The audio output format can be selected as either AES/EBU, or one of two
serial audio data output modes. A maximum of 16 channels of audio can be
demultiplexed by cascading two devices in parallel.
Audio control packets, as defined in SMPTE 299M, can also be demultiplexed to
obtain information about the nature of the embedded audio data. The contents of
the audio control packet are stored in registers of the Host Interface.
The GS1503B will also demultiplex arbitrary data packets as defined in SMPTE
291M. The arbitrary data packets can serve as an auxiliary data signal for
proprietary applications. The GS1503B can be configured to demultiplex arbitrary
data packets and output them at dedicated external pins or via the Host Interface
registers. Up to a maximum of 255 8-bit words can be demultiplexed (excluding
Ancillary Data Flags and Checksum).
To use the GS1503B in Demultiplex Mode, set the MUX/DEMUX external pin
HIGH.
Proprietary and Confidential
10-bit Y and C
20-bit scrambled input
20-bit scrambled output
10-bit Y and C
b
b
/C
/C
r
r
input with TRS and Line Numbers
output
37953 - 0
August 2006
GS1503B Data Sheet
52 of 88