GS1503B Просмотр технического описания (PDF) - Gennum -> Semtech
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GS1503B Datasheet PDF : 90 Pages
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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 Y and Cb/Cr input with TRS and Line Numbers
• 8-bit Y and Cb/Cr input with TRS and Line Numbers
10-bit or 8-bit Y and Cb/Cr input without TRS and Line Numbers (GS1503B will insert TRS
and Line Numbers based on EXTF and EXTH inputs)
• 20-bit scrambled input
The video output format can be one of the following configurations:
• 20-bit scrambled output
• 10-bit Y and Cb/Cr output
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.
GS1503B HD Embedded Audio CODEC
Data Sheet
37953 - 1
December 2009
17 of 90
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