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TDA9614H Datasheet(PDF) 10 Page - NXP Semiconductors |
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TDA9614H Datasheet(HTML) 10 Page - NXP Semiconductors |
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10 / 60 page  1995 Mar 21 10 Philips Semiconductors Preliminary specification Audio processor for VHS hi-fi and linear audio TDA9614H Table 1 Output select possibilities 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 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. SELECTION REMARK DESCRIPTION STEREO(1) hi-fi stereo audio FM output signal left and right channel LEFT hi-fi left audio FM output signal left channel (language 1) RIGHT hi-fi right audio FM output signal right channel (language 2) NORMAL linear audio linear audio NOR + ST linear and hi-fi mix of audio FM stereo and linear audio NOR + L linear and left mix of audio FM left channel and linear audio NOR + R linear and right mix of audio FM right channel and linear audio MUTE mute SELECTION DESCRIPTION NORMAL linear audio, useful for monitoring during ‘audio dubbing’ EXT2(1) audio from input EXT2 EXT3(2) audio from input EXT3 |
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