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TDA9614H

Audio processor for VHS hi-fi and linear audio

Philips Electronics 

Philips Semiconductors

Audio processor for VHS hi-fi

and linear audio

Preliminary specification

TDA9614H

Table 1 Output select possibilities

SELECTION REMARK

STEREO(1) hi-fi stereo

LEFT

hi-fi left

RIGHT

hi-fi right

NORMAL linear audio

NOR + ST linear and hi-fi

NOR + L

linear and left

NOR + R

linear and right

MUTE

mute

DESCRIPTION

audio FM output signal left and right channel

audio FM output signal left channel (language 1)

audio FM output signal right channel (language 2)

linear audio

mix of audio FM stereo and linear audio

mix of audio FM left channel and linear audio

mix of audio FM right channel and linear audio

Note

1. STEREO is the ‘standard’ setting, LEFT and RIGHT are for language selection. Using the tuner as input or output

signal (record or loop-through of audio FM) the VCR can automatically switch from stereo to left (language 1) when

a ‘dual language’ transmission is received. If the VCR is in playback mode and no hi-fi track is present (checking bit

AFOM via the I2C-bus or using the level at pin 11) the VCR can switch the output select to NORMAL (or let the IC

do this automatically by setting bit AUTN). If a hi-fi track is present the user may want to switch to LEFT and RIGHT

if the recording made was a ‘dual language’ recording.

Furthermore the user may want to switch from a hi-fi selection to NORMAL, e.g. when a complete audio remix has

been created on the linear track using ‘audio dubbing’ (see Section 6.7). ‘Audio dubbing’ can also be used to

re-record the linear track with e.g. only commentary. Combined playback of this commentary together with the

original hi-fi sound is then possible by means of a mix mode.

6.1.6 RF CONVERTER MUTE (RFCMUTE)

The RFC output is a mono output derived from the output select, its output signal can be muted.

6.1.7 LINE SELECT (LINESEL)

The line output select is normally connected to both CINCH (hi-fi set) and television (SCART1). Normally the audio signal

from the output select will be available at this output, but three extra selections are possible and they are shown in

Table 2.

Table 2 Extra line select possibilities

SELECTION

DESCRIPTION

NORMAL

EXT2(1)

EXT3(2)

linear audio, useful for monitoring during ‘audio dubbing’

audio from input EXT2

audio from input EXT3

Notes

1. A signal from a source at EXT2 (laser disc or second VCR) can be connected to a television set at line out. Because

this is a direct connection from the input to the line output buffers it is fully independent of any mode setting of the

IC. Connection of a ‘Pay-TV’ decoder box to EXT2 and using this selection together with selecting EXT1 in the

decoder select enables combined use of the decoder box by both TV and VCR. In Europe, use of the SCART

connector ‘status line’ can automatize this switching.

2. Direct audio connection from input EXT3. If the line 2 outputs and EXT3 inputs are not used for external connections

a built-in karaoke unit or sound processor can be inserted between line 2 and EXT3.

1995 Mar 21

10

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