CXD2721Q-1
CXD2721Q-1 is Single-Chip Digital Signal Processor for Karaoke manufactured by Sony Semiconductor Solutions.
Single-Chip Digital Signal Processor for Karaoke
Description The CXD2721Q-1 is a Karaoke LSI suitable for use in video CD/LD/CD-G/CD and the like. A large capacity DRAM and AD/DA converters are built in, and a Karaoke mode providing simple surround and Karaoke functions such as key control, microphone echo and voice cancelling, and a music mode providing functions such as surround, parametric equalizer and bass/treble tone control are contained on a single chip. Features
- 3-channel 1-bit AD converter, decimation filter and prefilter operational amplifier S/N ratio: 92d B THD + N: 0.02% Filter pass band ripple: ±0.5d B or less Filter stop band attenuation:
- 41d B or less (all characteristics are typical values)
- 2-channel 1-bit DA converter, oversampling filter and post filter S/N ratio: 97d B THD + N: 0.005% Filter pass band ripple: ±0.2d B or less Filter stop band attenuation:
- 41d B or less (all characteristics are typical values)
- In addition to analog I/O, digital I/O (2-channel input/2-channel output) are provided. The interface also supports a wide variety of formats.
- 128K-bit DRAM for key control, microphone echo and surround processing Functions
- Key controller pitch settings can be varied to a maximum of ±1 octave with a precision of 14 bits.
- Microphone echo delay time can be varied to a maximum of 278ms (when Fs = 44.1k Hz).
- Voice canceller supports settings other than center using panpot volumes.
- Voice parametric equalizer
- Voice pitch shifter
- Mixing function to support sound multiplexing software 100 pin QFP (Plastic)
- Digital de-emphasis function
- Simple surround function
- Music mode (switches with Karaoke mode) pressor function Parametric equalizer function Surround function Bass/treble tone control function Structure Silicon gate CMOS Applications Equipment with Karaoke functions, such as video CD/LD/CD-G/CD, pact music centers, video games, etc....
