8 PLAYBACK

8-5 ERROR CORRECTION

Error correction of digital playback signals is performed with the error correction

circuit and the error conceal circuit.

8 PLAYBACK

 

8-7 SIMPLIFIED PLAYBACK SPEED ADJUSTMENT FUNCTION

The playback speed can be increased or decreased in two ways (simplified playback speed adjustment function).

When two VCRs are being played back, this function helps synchronize playback operation (sync operation).

[IN] button

[OUT] button

Error correction circuit

: Errors in playback data caused by dropouts or mis-

 

tracking are corrected using the results of the data

 

operation.

Error conceal circuit

: Major errors that the error correction circuit cannot

 

correct are concealed with the previous frame data.

Switching the setting of menu switch No. 112 <ECC MODE> turns the error

correction circuit ON/OFF.

The relationship between the menu setting and error correction operation is shown

 

AUDIO INPUT / AUDIO MONITOR SELECT

 

 

SDI

CH1

CH2

CH3

CH4

SIF

 

AES/EBU

CH1

CH2

CH3

CH4

LINE

 

L

 

ANALOG

CH1

CH2

CH3

CH4

CPN

 

R

 

CH1

CH2

CH3

 

CH4/TRACKING

 

PHONES

CH1

CH2

REC CH3

 

CH4

TRACKING

 

 

PULL FOR VARIABLE

 

METER MODE

PULL

RELEASE

PLAY

 

 

 

 

 

 

 

 

 

 

VIDEO CASSETTE RECORDER

BR-D95U

 

 

 

 

 

 

 

 

 

 

 

 

POWER

 

 

 

 

 

 

 

 

 

 

 

ON

I

 

 

 

 

 

 

COMPONENT DIGITAL

 

 

 

OFF

O

 

 

 

 

 

Variable Motion

 

 

[PLAYER] button

AUTO OFF P.READ V.VAR

PB/EE REMOTE

625

 

 

UB

RESET

VCON

REMOTE

 

[RECORDER] button

CTL TC UB

DF SERVO CF GEN 16:9 AP

525

CONDITION

 

COUNTER

 

 

 

 

 

 

 

 

 

MENU

SET

HOLD

PB

 

 

 

 

 

 

 

 

 

PB/EE

 

 

 

 

 

 

 

 

 

 

 

 

 

STILL

 

 

H

 

M

S

F

 

 

 

 

 

 

 

ASSEM

VIDEO

DA1

DA2

DA3

DA4

EJECT

REC

PLAY

PAUSE/STILL

 

 

 

 

 

 

 

 

 

 

 

 

 

X-1

X1

IN

ENTRY

OUT

INSERT

 

TC

TOP

 

VIDEO

AUDIO

 

Jog dial

 

CANCEL PREVIEW

AUTO EDIT

PREROLL

STAND BY

REW

STOP

FF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PULL

SHIFT

 

REVIEW

 

 

USER

SERVO/SYS

TIME CODE

ON SCREEN

OTHERS

 

RELEASE

 

 

 

REV

FWD

in the table below.

 

 

Menu setting

Error correction circuit

Error conceal circuit

NORMAL

o

o

[ENTRY] button

 

 

[PLAY]

[REW]

[FF]

 

[PREVIEW] button

button

button

button

NO CONCEAL

o

x

NO CORRECTION

x

x

o : Activated

 

 

x: Deactivated

Normally set to “NORMAL (0)”.

Turning part or all of the error correct circuit OFF allows you to compare noise levels and check the head service life. For comparison, play back a moving picture.

For example, when switching between “NORMAL” and “NO CONCEAL” shows a big difference in picture quality, it indicates that the error conceal circuit works and that a major error has occurred. In this case, the heads may no longer be serviceable and should be replaced.

8-6. AUDIO V. FADE FUNCTION

Major changes in waveforms during audio transitions may be heard as noise during playback. To reduce this noise, an Audio V. Fade function is provided. When this is operating, audio transitions are detected and the audio level is faded in a V shape during playback. This function can be set with menu switch No. 214 <PBV. FADE>. OFF (0) : The V. fade function is disabled. 5M (1) : The V. fade function is enabled and audio transitions are faded out and faded in for 5 msec to reduce noise. For best results, this position is recommended. 10M (2) : The V. fade function is enabled and audio transitions are faded out and faded in for 10 msec to reduce noise.

Increasing/decreasing the playback speed by 7%

1.During playback, press the [FF] or [REW] button while pressing the [PLAY] button.

While the [FF] button is pressed: The playback speed is increased by about 7%.

While the [REW] button is pressed: The

playback speed is decreased by about 7%.

2.Operation differs depending on which button you release first.

If you release the [PLAY] button first, playback speed increased/decreased by about 7% is maintained (Latch mode).

To return to the normal speed, press the [PLAY] button again.

If you release the [FF] or [REW] button first, the normal playback mode is restored.

Synchronized Running mode

The tapes loaded on two VCRs can be played back in sync with the same time code data.

Connection

Connect the [REMOTE IN] connector of the controlled VCR and the [REMOTE OUT] connector of the control VCR with a 9-pin cable.

Input external sync signals to synchronize the two VCRs.

Setting

Set the Remote/Local switch to “Remote” on the controlled VCR and set the Remote/Local switch to “Local” on the control VCR.

Operation

1.Set menu switch No. 372 <P+R AT SWAP MODE> to “ENABLE”.

2.Press the [PLAYER] and [RECORDER] buttons at the same time. Both buttons light up.

3.If the edit mode (assemble, insert) is selected, release it.

4.Search the position from which you want to start playback using the control VCR’s jog dial, etc.

5.Press the [ENTRY] button while pressing the [IN] button to determine the edit IN point for synchronized playback.

[ The time code data determined by the control VCR is registered as the playback start point on the two VCRs.

6.Press the [PREVIEW] button to start the synchronized tape running.

The phase is adjusted just before the edit IN

point for synchronization.

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JVC BR-D95U specifications Error Correction, Simplified Playback Speed Adjustment Function, Audio V. Fade Function