Digital Signal Processor
Ordering number : EN5663
CMOS IC
LC83026E
Digital Signal Processor for Karaoke Systems
Overview
The LC83026E provides...
Description
Ordering number : EN5663
CMOS IC
LC83026E
Digital Signal Processor for Karaoke Systems
Overview
The LC83026E provides the audio signal processing required in karaoke systems, including pitch shift, microphone echo, voice muting, and simple surround simulation. It is a special-purpose DSP that implements karaoke processing with the addition of a single external 256-Kb DRAM. The LC83026E includes on-chip A/D and D/A converters and supports both digital and analog inputs and outputs. Its functions and characteristics can be modified to match the needs of the end product by sending coefficient data from the microcontroller over a serial interface.
Features
Application features — Pitch shift The LC83026E supports pitch shifting of ±15 quarter tone steps, or ±1 octave in scale tone units as specified by command data. This pitch shifting can be applied either to the music track or to the microphone input. It is also possible to set up pitch shifting of ±1 octave in arbitrary steps by setting coefficient values. — Microphone echo The LC83026E can apply echo processing to the input signal from the microphone A/D converter. The echo coefficients, including amount of echo and delay time, can be set. — Voice muting The LC83026E provides attenuation of monaural components in the music signal. This allows CDs that include vocals to be used for karaoke. The voice muting function is turned on or off by command data transferred over the serial interface. — Simple surround The LC83026...
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