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| Techwell Mixed Signal Semiconductor Solutions TECHWELL SECURITY Security Surveillance IC Solutions PRELIMINARY Features www..com TW2815 4 Channel Video Decoders and Audio Codecs For Security Applications * Pin to pin compatible with the TW2816 Target Applications Standalone DVR PC Based DVR Features Accepts all NTSC(M/N/4.43) / PAL(B/D/G/H/I/K/L/M/N/60) standards with auto detection Integrated four video analog anti-aliasing filters and 10 bit CMOS ADCs High performance adaptive 4H comb filters for all NTSC/PAL standards IF compensation filter for improvement of color demodulation Color Transient Improvement (CTI) Automatic white peak control Programmable hue, saturation, contrast, brightness and sharpness Proprietary fast video locking system for nonrealtime application Supports the standard ITU-R BT.656 format or time multiplexed output with 54MHz Provides simultaneous four channel Full D1 and CIF time-multiplexed outputs with 54MHz Integrated four audio ADCs and one audio DAC * Provides multi-channel audio mixed analog output * Supports a standard I2S interface for record output and playback input * 8/16 bit audio word length Sample audio with 8/16KHz Supports a two-wire serial host interface Ultra low power consumption (Typical 500mW) 100 TQFP package * TW2815 only The TW2815 includes four high quality NTSC/PAL video decoders that convert analog composite video signal to digital component YCbCr data for security applications. The TW2815 contains four 10 bit ADC and proprietary clamp and gain controllers and utilizes a 4H comb filter for separating luminance & chrominance to reduce cross noise artifacts. The TW2815 adopts the image enhancement techniques such as IF compensation filter, CTI and programmable peaking. The TW2815 also includes an audio CODEC which has four audio Analog-to-Digital converters and one Digital-to-Analog converter. A built-in audio controller can generate digital outputs for recording/mixing and accepts digital input for playback. Block Diagram Audio Audio Audio Audio Video Video Video Security Cameras Video IS Display Video Controller CODEC/ DSP Internet 2 TW2815 656 656 656 656 HDD l wel TecTh 2815 W Techwell Mixed Signal Semiconductor Solutions www.techwellinc.com Security Surveillance IC Solutions PRELIMINARY TW2815 Block Diagram 4H Comb Video Decoder TW2815 4 Channel Video Decoders and Audio Codecs For Security Applications * Pin to pin compatible with the TW2816 BT .656 Interface VIN1 ADC VD1[7:0] VD2[7:0] VD3[7:0] VD4[7:0] MPP1 MPP2 MPP3 MPP4 www..com AIN1 ADC Decimation Filter MPP Interface Clock Generator VIN2 ADC 4H Comb Video Decoder AIN2 ADC Decimation Filter CLKPO CLK541 CLKNO VIN3 ADC Host Interface 4H Comb Video Decoder SCLK SDAT IRQ AIN3 ADC Decimation Filter VIN4 ADC 4H Comb Video Decoder I2S Interface ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP AIN4 ADC Decimation Filter AOUT DAC Interpolation Filter About Techwell Techwell is a fabless semiconductor company that designs, markets and sells mixed signal integrated circuits for multiple digital video applications in the consumer, security surveillance and automotive markets, including advanced TVs, multifunction LCD monitors,DVD Recorders, security surveillance systems and in-car LCD displays. Founded in 1997,we currently have over 70 employees and are headquartered in San Jose,California, with additional R&D and sales activities in South Korea, Japan,Taiwan and China. Techwell For more information on Techwell, please contact us at 1-408-435-3888 (c) 2006 Techwell Inc. All rights reserved. All other trademarks are property of their respective owners Mixed Signal Semiconductor Solutions TECHWELL INC. TEL 1-408-435-3888 www.techwellinc.com |
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