Philips DVDR615 Service Manual page 137

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Circuit-, IC descriptions and list of abbreviations
9.2.4 Backend Digital part
Record Mode
7007
VIP
SAA7118
7000
PID1394P25
OPTIONAL
1000
1394
CONNECTOR
Video Part
The analogue video input signals CVBS, YC and YUV/RGB
(RGB for Euro and YUV for USA) from the MOBO analog board
are routed from connector [1901] to IC [7007] SAA7118 , Video
Input Processor.
The digital video input signals are routed from the DV-in
connector [1000] via ICs [7000], 1394 PHY and [7001] 1394
LINK to Chrysalis PNX7100 [7800].
The multi-standard Video Input Processor VIP, [7007] encodes
the analogue video to digital stream (CCIR656 format). It
provides filtering of the analogue signals and separation of
luminance and chrominance by a comb filter. The output
stream, named ITU_IN(7:0), is then routed to the Chrysalis
[7800]. This IC encodes and decodes the digital video stream
into/from MPEG2 format.
Audio Part
2
I S audio is sent from the MOBO analog board to the Chrysalis
[7800] via connector [1902]. The Chrysalis [7800] compresses
2
the I S audio data into an MPEG1-L2/AC3 audio stream.
2
Front-end I S
Chrysalis [7800] interfaces directly with the Centaurus [7500]
and buffers the in- and out-going data streams.
In the Chrysalis [7800], the video MPEG2 stream and the audio
AC3 stream are multiplexed into an I
are sent to the Centaurus [7500] for recording.
Playback Mode
During playback, the serial data from the Centaurus [7500] is
going directly to the Chrysalis [7800] via the serial front-end I
interface. The Chrysalis [7800] is an MPEG CoDec and has
the following outputs:
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TO/FROM FRONTEND PART
UART I2S
I2C0
7800
CCIR656
CHRYSALIS
PNX7100
CLOCK
XIO_1
7001
1394 1394
PID1394L40
-5V 3V3 5V
FROM POWER SUPPLY
Figure 9-5 Chrysalis Block
2
S stream. The serial data
I2C I2C
EEPROM EEPROM
64Kbit 64Kbit
I2C 0
I2C 1
7902/7903
SDRAM
4M X 16 x 4
XIO_0
NORFLASH
4M
12V
(1) analogue CVBS / YC and RGB/YUV
(2) analogue CVBS, YC, RGB/YUV
• To the MOBO analog board: analogue video RGB, YC,
CVBS on connector [1901].
2
• I S audio (PCM format) on connector [1902].
• SPDIF audio (digital audio output) on connector [1902].
• Communication gateway (RS232) on connector [1907].
2
S
DVDR615/69 9.
1FH VIDEO
(2)
OUT
DIG. AUDIO IN
OPT. & COAX
DIG. AUDIO OUT
I2S AUDIO OUT
I2S AUDIO IN
1FH VIDEO IN
EN 137
(1)