YSS944 Datasheet, PDF (10/34 Pages) YAMAHA CORPORATION – ADAMB Advanced Digital Audio Multi channel decode processor

YSS944/943/940
- Expands to 3 channels from 2 channels of LS and RS (supports ES Matrix processing when combined
with DTS decoding function).
- Supported sampling frequencies are 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, and 96 kHz.
[Note]
- The YSS943 and YSS940 do not support DTS Neo:6 decoding.
(3) Post Processor Functions
The following post-processing function can be applied to the results of main decoder or post decoder.
• Post-processing input channel selection
- Firmware Switcher is included.
- Supports 8 channels.
• Tone control
- Firmware Tone controller is included.
- Adjustable bass and treble for left and right channels
- Supported sampling frequencies are 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz, 128 kHz,
176.4 kHz, and 192 kHz.
• Bass Management
- Firmware Bass manager is included.
- Characteristics can be changed by changing the coefficient.
- Up to 7.1-channel input/output.
- Supported sampling frequencies are 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz, 128 kHz,
176.4 kHz, and 192 kHz.
• Volume adjustment
- Firmware Scaler is included.
- Adjustable master volume (setting range: -127 dB to +31 dB, in 1 dB units).
- Adjustable volume for up to eight channels (-∞ dB to +12 dB, phase inversion enabled).
(4) Generator Functions
• Noise generation
- Firmware noise generator is included.
- Enables generation of pink noise (“shaped noise” in the Dolby standard) and white noise.
- Supported sampling frequencies are 32 kHz, 44.1 kHz, and 48 kHz.
• Impulse generation
- Firmware impulse generator is included.
- Impulses can be generated.
- Supported sampling frequencies are 32 kHz, 44.1 kHz, and 48 kHz.
(5) Other Functions
• Microprocessor interface
- This is a four-wire serial interface.
- Enables register access and on-chip memory access (firmware download).
• Firmware download
- Instruction code from the microprocessor to this LSI and coefficient data can be downloaded.
- The amount of 6-/7-/8-channel output delay can be changed.
- The filter characteristics of the bass management function can be changed.
- Functions can be expanded for future use.
[Note]
- The boot firmware must be downloaded at initialization.
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