Audio Signal Processing - JVC GR-DVA10 Technical Manual

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
(MENU)
16 BIT
12 BIT

2.5.6 Audio signal processing

This model adopts a new audio signal processing IC, which comes equipped with AD and DA converter.
IC2201 Audio & A/D_D/A
M I C
Lch
P H A S E
Rch
P H A S E
IC3001 DECK DSP
D R A M
Sampling
frequency
48kHz
32kHz
Table 2-5-2 Channel format
O F F
E Q
O N
H P F
O F F
E Q
O N
H P F
S H U T T E R
16 → 12bits
C O N V E R T
I/F
C H 1
12 → 16bits
F A D E R
C H 2
C O N V E R T
Fig. 2-5-6 Audio block diagram
Channel
CH 1
CH 2
CH1 SOUND 1
CH2 SOUND 2
A L C
MIX
A U D I O
A D C
I/F
MIX
A L C
C H 1
AIDAT
A D
MIX
C H 2 I/F
D O D A T
D A
MIX
I/F
2-27
L ch
R ch
L ch
R ch
L ch
R ch
E E / R E C
P B
D A C
P B
E E / R E C
V O L
MIX
V O L
D O M C K
D O B C K
C L K
D O L R C K
Audio
dubbing
A/V OUT
M U T E
M U T E
S P