GS1503B Gennum Corporation, GS1503B Datasheet - Page 18

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

4. Detailed Description
4.1 Multiplex Mode
4.1.1 Functional Overview
The GS1503B HD Embedded Audio CODEC fully supports the multiplexing 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:
•
•
10-bit or 8-bit Y and C
insert TRS and Line Numbers based on EXTF and EXTH inputs)
•
The video output format can be one of the following configurations:
•
•
Up to a maximum of 8 channels of 48kHz digital audio can be multiplexed per
device. The audio input format can be selected as either AES/EBU, or one of two
serial audio data input modes. A maximum of 16 channels of audio can be
multiplexed by serially cascading two devices.
Audio control packets, as defined in SMPTE 299M, can also be multiplexed to
provide information to receivers about the nature of the embedded audio data. The
contents of the audio control packet can be programmed via the Host Interface.
The GS1503B will also multiplex 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 multiplex arbitrary
data packets, input via the Host Interface or using dedicated external pins. Up to a
maximum of 255 8-bit words can be multiplexed (excluding Ancillary Data Flags
and Checksum).
To use the GS1503B in Multiplex Mode, set the MUX/DEMUX external pin LOW.
Proprietary and Confidential
10-bit Y and C
8-bit Y and C
20-bit scrambled input
20-bit scrambled output
10-bit Y and C
b
/C
b
b
/C
/C
r
r
input with TRS and Line Numbers
r
b
input with TRS and Line Numbers
output
/C
r
input without TRS and Line Numbers (GS1503B will
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August 2006
GS1503B Data Sheet
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