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NSP-2100A
2.1ch full digital audio amplifier processor with external memory interface |
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Overview
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NSP-2100A is a core DSP controller IC for advanced 2.1 channel full digital amplifier systems. It has two channels of auxiliary PWM output and three channels of auxiliary digital audio output. NSP-2100A includes essential preprocessor features like full channel mixer, adaptive gain control, de-emphasis, 3D surround, 5band graphic EQ, general purpose biquad filter blocks, delay line and volume control & dynamic range compression. Using external memory, Lip-sync delay compensation can be implemented. NeoFidelity's patent filed functional block called SFACS(Sampling Frequency Adaptive Coefficient Scaling) and world-unique floating point operation scheme eliminate audio performance degradation problem in the conventional asynchronous SRC system and are optimized for preserving audio quality. |
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Applications
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Digital TV product
PDP, LCD TV
Digital broadcast receiver with built-in amplifier
2.1ch multimedia PC speaker, gaming device
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Functional block diagram
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Features
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Input |
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2 channel I©÷S input
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32kHz~192kHz input fs support
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Optional 2 channel SPDIF interface
Micom controlled thru I©÷C |
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Output |
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3 channel PWM output
3 channel I©÷S/SPDIF AUX output or 2 channel PWM line out |
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Pre-processing |
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Floating point operation
External memory control interface for lip-sync. delay
Adaptive gain control for inter-channel level compensation
De-Emphasis
5 band graphic equalizer
3D surround algorithm
5 biquads filter per channel
- Bass management for active/passive subwoofer
- Programmable parametric EQ
- Loudness control
- Loud-speaker EQ, etc.
Two stage volume control +48 ~-¡Ä dB range, 0.0625dB step
Dynamic range compression |
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PWM conversion |
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PWM-mask control for power stage control
PWM output channel mapping |
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64 pin TQFP package |
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1.8V core, 3.3V I/O power supply |
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