2-27
The audio recording system of this model is as follows. In the 2-channel mode, quantiazation is linearly
processed in a data unit of 16-bits and the sampling frequency is 48kHz. In regard to the recording pattern,
the first 5 tracks (6 tracks in PAL) of 10 tracks (12 tracks in PAL) in a frame is used for CH1 recording and
the second 5 tracks in a frame is used for CH2 recording. Since audio data for one channel is interleaved
extending over 5 tracks (6 tracks in PAL), it is possible to interpolate audio data by 1
/
5 (or 1
/
6 in PAL) if
there is a data error in a track.
In the 4-channel mode, quantiazation is non-linearly processed to convert 16-bits input data into 12-bit
data and the sampling frequency is 32kHz. In regard to the recording pattern, the CH1 is used for
recording sound-1 while the CH2 is used for recording sound-2 which is used for audio dubbing. The
previous models show the audio mode by the sampling frequency of 48kHz or 32kHz, however, the recent
models show it by 16-BIT or 12-BIT to meet the market trend.
Sound mode Sampling
(MENU) frequency
L ch
R ch
L ch Audio
R ch dubbing
L ch
R ch
Channel
16 BIT 48kHz
CH 1
CH 2
SOUND 1
SOUND 2
12 BIT 32kHz
CH1
CH2
Table 2-5-2 Channel format
2.5.6 Audio signal processing
This model adopts a new audio signal processing IC, which comes equipped with AD and DA converter.
Rch
Lch
PHASE
EQ
EQ
HPF
HPF
ALC
ALC
PHASE
ADC
AUDIO
I/F
DAC
MUTE
MUTE
VOL
VOL
MIX
MIX
MIX
AD
I/F
DA
I/F
CLK
MIX
MIX
16
→
12bits
CONVERT
12
→
16bits
CONVERT
FADER
DRAM
I/F
SP
SHUTTER
IC2201 Audio & A/D_D/A
IC3001 DECK DSP
MIC
CH1
CH2
CH1
CH2
AIDAT
DODAT
DOMCK
DOBCK
DOLRCK
OFF
ON
OFF
ON
EE/REC
PB
PB
EE/REC
A/V OUT
Fig. 2-5-6 Audio block diagram
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