參數(shù)資料
型號(hào)： GS1503-CFZ
廠商： Gennum Corporation
元件分類： Codec
英文描述： HD EMBEDDED AUDIO CODEC
中文描述： 高清嵌入式音頻編解碼
文件頁(yè)數(shù)： 41/83頁(yè)
文件大?。?/td> 815K
代理商： GS1503-CFZ
15879 - 4
41 of 83
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2. DEMULTIPLEX MODE
2.1 FUNCTIONAL OVERVIEW
The GS1503 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 GS1503 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 C
b
/C
r
input with TRS and Line Numbers
20-bit scrambled input
The video output format can be one of the following
configurations:
20-bit scrambled output
10-bit Y and C
b
/C
r
output
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 GS1503 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 GS1503 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 GS1503 in Demultiplex Mode, set the
MUX/DEMUX external pin HIGH.
2.2 VIDEO STANDARD
The video standard is selected from the VM[3:0] external
pins or VM[3:0] bits 3-0 in Host Interface register 000h. To
configure the video standard via the Host Interface, VM_SEL
bit 7 in Host Interface register 000h must be set HIGH. The
GS1503 will default to the VM[3:0] external pin setting. The
supported video standards are listed in Table 10.
.
Table 10: Supported Video Standards
VM [3:0]
INPUT FORMAT
REFERENCE SMPTE DOCUMENT
SMPTE 292M LEVEL
1110b
1035i (30 & 30/1.001 Hz)
260M
A, B
1100b
1080i (25 Hz)
295M
C
1000b
1080i/1080sF (30 & 30/1.001 Hz)
274M, RP211
D, E
1010b
1080i/1080sF (25 Hz)
274M, RP211
F
1111b
1080sF (24 & 24/1.001 Hz)
RP211
0010b
1080p (30 & 30/1.001 Hz)
274M
G, H
0100b
1080p (25 Hz)
274M
I
0110b
1080p (24 & 24/1.001 Hz)
274M
J, K
0000b
720p (60 & 60/1.001 Hz)
296M
L, M
0001b
720p (30 & 30/1.001 Hz)
296M
0011b
720p (50 Hz)
296M
0101b
720p (25 Hz)
296M
0111b
720p (24 & 24/1.001 Hz)
296M
All other settings are reserved
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