saa7803 NXP Semiconductors, saa7803 Datasheet - Page 38
saa7803
Manufacturer Part Number
saa7803
Description
Saa7803 One Chip Cd Audio Device
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7803.pdf
(74 pages)
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Philips Semiconductors
9397 750 13695
Objective data sheet
Fig 21. Back-end audio functions
SOFT MUTE
SILENCE
DETECT
DETECT
ERROR
6.6.7.1 Audio processing
6.6.7.2 Interpolate and hold
MEMPROC
Decoded and error corrected CD-data streams into the audio back-end from the memory
processor to the output interfaces. Some audio filtering can also be done (in case of
playing CD-DA).
The following audio features are present at the back-end:
Some status bits concerning these audio features can be read back via register
MuteKillStatus.
On CD audio disks with many (large) defects, where C1 / C2 correction can not correct all
errors, the audio data can be interpolated / held, to avoid audible clicks and plops when
playing back the disk. This feature is enabled by setting FilterConfig(INTERPOLATEEN).
The principle is depicted in
•
•
•
•
•
•
•
•
Interpolate / hold for I
Soft mute for I
Hard mute for EBU
De-emphasis filter for I
Upsample filter for I
Error detection
Silence detection
Kill generation.
INTERPOLATE/
GENERATION
HOLD
KILL
DE-EMPHASIS
2
S-bus and EBU
Rev. 01 — 19 April 2005
2
S-bus
left KILL
right KILL
2
S-bus and EBU
2
Figure
S-bus
22.
HARD MUTE
UPSAMPLE
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
One chip CD audio device
I
2
S-BUS
EBU
001aab765
SAA7803
EBU
I
2
S-bus
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