Sony dvp-s530d User Manual
4
Global Bit Management
Once compression has taken place, an examination of the six data streams
for density is made. Bit groups are tagged and moved from a high-den-
sity channel to a low-density channel equalizing the amount of data.
for density is made. Bit groups are tagged and moved from a high-den-
sity channel to a low-density channel equalizing the amount of data.
0011100011000011111001010101 channel 1
0000001011000000000000000000 channel 3
Variable Length Coding
Common fixed length codes and no data (00000000) codes are removed
and replaced with shorter codes using a look up table. These shorter
length code replacements are flagged for decoding.
and replaced with shorter codes using a look up table. These shorter
length code replacements are flagged for decoding.
0100011111
ROM Table
011 + flag
Multiplexer
The six compressed channels are combined into a single line for ease of
delivery. To do this each channel is stored into a register made up of flip-
flops. A high speed Multiplexer removes the information at six times the
storage (sample) speed.
delivery. To do this each channel is stored into a register made up of flip-
flops. A high speed Multiplexer removes the information at six times the
storage (sample) speed.
Multiplexer
Six Channels
N sample
frequency
frequency
F/F type
Registers
Registers
6 lines
Packer
The packer organizes the information into blocks and adds:
·
Error correction
·
Synchronization information to each block and groups of blocks
Compression Block:
ADPCM:
From
time to
freq
Converter
time to
freq
Converter
•
Transient analysis
•
Vector analysis
•
Prediction analysis
Global Bit Management
Multiplexer
Variable Length Coding