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YSS915 Datasheet Preview

YSS915 Datasheet

Karaoke Processor 2 for Video disc player

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YSS915
Karaoke Processor 2 for Video disc player
(KP2V2)
INTRODUCTION
YSS915 (KP2V2) is an LSI for processing Karaoke voice signals.
This LSI has an A/D converter (1 channel) for the microphone echo, and a memory for the microphone echo and
key control. These features allow achieving the functions needed for the Karaoke system by using only one LSI
chip. As for the microphone echoes, many other types of echoes are available in addition to ordinary ones so that
YSS915 is applicable to various uses.
In addition to these Karaoke programs, YSS915 is able to provide the Movie & Music programs, with which the
surround effect is applied to the movie and music sources for giving the users more enjoyment.
YSS915 is pin compatible with and register compatible with YSS903 (KP2V).
FEATURES
[ Fundamental Functions ]
1) Karaoke program
Key Control (Control by 50 cents in +/- 600 cent range, +/- one octave, etc.)
Voice Cancel
Microphone Echo
Normal microphone echo (174 msec or less (fs = 44.1 kHz))
Stereo-Echo/ Reverb-Echo
Microphone Key Control (+/- 10 cents, +/- 20 cents, +/- 400 cents, +/- 700 cents and +/- 1 octave)
Microphone "YMERSION™"
Tone Control
Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
Surround
"YMERSION™" (Yamaha's original wide surround technology)
2) Movie and music program
Surround
Initial reflection sound synthesizing system
Yamaha "YMERSION™"
Tone Control
Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
[ I/O Interface ]
Digital signal inputs
: 2 channels (16/18/20/24 bits)
Digital signal outputs : 2 channels (16/18/20/24 bits)
Analog signal input
: 1 channel ( for the microphone )
Microprocessor interface : Serial four line system
Through-mode
: Digital input is outputted without any processing
(Correspond with fs = 96 kHz 24 bit DVD format)
[ Others ]
Pin/register upper compatible with YSS903 (KP2V)
Sampling frequency
: 32, 37.8, 44.1, 48 kHz or correspond with 96 kHz through-mode.
Package
: 28 pin SOP ( YSS915-M )
YAMAHA CORPORATION
YSS915
CATALOGUE No:LSI-4SS915A2
1999.09




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YSS915 Datasheet Preview

YSS915 Datasheet

Karaoke Processor 2 for Video disc player

No Preview Available !

YSS915
Difference between YSS903 and YSS915
1. No built-in DAC.
(Refer to the process flow chart in “OPERATIONS”.)
2. Connectable directly with MSB justified data output ADC.
(Refer to “Format 4” of “4. Digital audio interface” in “ FUNCTIONS”.)
3. Microphone interface terminals CDI and CDO can be connected on the board.
This feature allows to reduce the number of ports by one.
(Refer to “5. Microcomputer interface” in “ FUNCTIONS”.)
4. Input fader has been added for the microphone echo.
This feature allows to apply fade-in/fade-out control to the microphone echo through designation with
one bit from the microcomputer.
(Refer to “1. Karaoke program” in “ OPERATIONS”, and “3) VCR ($02)” of “1. Functions” in
“REGISTERS”.)
5. Zero level detection function has been added for digital audio output.
YSS915 outputs “0” at the pin “ZERO” when an audio input has been zero for a certain period.
This signal can be used to improve S/N ratio by muting the output of external DAC.
(Refer to “6. Others” in “ FUNCTIONS”.)
6. An output port PO has been added for controlling peripheral devices.
The port “PO” can be used, as an example, to control the gain of audio output amplifier through this
LSI from the microcomputer.
(Refer to “6. Others” in “ FUNCTIONS”.)
7. A mode with extended band width for microphone echo has been newly added.
Two types of cut-off frequency have been added for the low pass filter.
(Refer to “7) RVR ($06)” and “11) MDR ($1C)” of “1. Functions” in “REGISTERS”.)
8. Internal DSP has been given the operation accuracy of 20 bits.
Internal multiplier-accumulator become 20bit*13bit=24bit therefore overall bit accuracy become
improved from 18bit(YSS903) to 20bit(YSS915).
In through-mode which internal DSP is not used for processing the accuracy of input data is
maintained to output.
2


Part Number YSS915
Description Karaoke Processor 2 for Video disc player
Maker ETC
Total Page 30 Pages
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