Techwell Target Applications TW2865 5 Embedded DVR Video Server DVR PCI Card 4-Channel Video Decoder and Audio Codec plus Video Encoder for Security Applications The TW2865 is a 4-in-1 video decoder and audio codec plus video encoder for security surveillance applications. The device includes four high quality NTSC/PAL/SECAM video decoders that convert analog composite video signal to digital component YCbCr data. Each channel contains a 10-bit ADC and proprietary clamp/gain controller and utilizes 4H comb filter for separating luminance & chrominance to reduce cross noise artifacts. The TW2865 adopts image enhancement techniques such as IF compensation filter, CTI and programmable peaking. In addition, TW2865 includes one NTSC/PAL video encoder with two 10-bit DACs to support CVBS and YC output. The TW2865 also includes an audio codec which has five audio ADCs and one DAC. A built-in audio controller can generate digital outputs for recording/mixing and accepts digital input for playback. New Features Integrated one video encoder and two 10-bit video CMOS DACs Proprietary fast video locking system for non-realtime application Integrated five audio ADCs and one audio DAC Low power consumption Typical Application Diagram C C T V Monitor S -V ideo / C V B S B T .656 27M H z V ideo In (C h1 - 4) HOST P rocessor B T .656 Audio In (C h1 - 4) T W 2865 27/54/108M H z I2S MUX/ CODEC ID E Mic rophone USB N etw ork I2S S peaker l wel h c e 5 T 286 TW Techwell www.intersil.com TW2865 5 4-Channel Video Decoder and Audio Codec plus Video Encoder for Security Applications Video Decoders Accepts all NTSC(M/4.43) / PAL(B/D/G/H/I/K/L/M/N/60)/SECAM standards with auto detection Integrated four video analog anti-aliasing filters and 10-bit ADCs High performance adaptive 4H comb filters for all NTSC/PAL standards IF compensation filter for improvement of color demodulation Color Transient Improvement (CTI) and automatic white peak control Programmable hue, saturation, contrast, brightness and sharpness Proprietary fast video locking system for non-realtime application Supports the standard ITU-R BT.656 format or time multiplexed output with 54/108MHz. Provides simultaneous four channel Full D1 and CIF time-multiplexed outputs with 54MHz V IN 3 A V IN 3 B M UX A IN 2 V IN 4 A V IN 4 B M UX A IN 3 D ec im ation F ilter AADDCC 4H C om b V ideo D ec oder AADDCC D ec im ation F ilter AADDCC 4H C om b V ideo D ec oder AADDCC D ec im ation F ilter AADDCC B T .656 Inte rfac e AADDCC V D 1[7:0] V D 2[7:0] V D 3[7:0] V D 4[7:0] MPP In te rfac e V IN 2 B 4H C om b V ideo D ec oder MPP 1 MPP 2 MPP 3 MPP 4 C loc k P L L C lo ck G e ne ra to r V IN 2 A MUX A IN 1 AADDCC H os t In te rfa ce V IN 1 B Audio Codecs 4H C om b V ideo D ec oder A IN 4 AADDCC D ec im ation F ilter A IN5 ADC D ec im ation F ilter AOU T DAC Interpolation F ilter I2S Inter fac e V IN 1 A MUX TW2865 Block Diagram Integrated five audio ADCs and one audio DAC Provides multi-channel audio mixed analog output Supports I2S/DSP Master/Slave interface for record output and playback input PCM 8/16 bit and u-Law/A-Law 8bit for audio word length Programmable audio sample rate that covers popular frequencies of 8/16/32/44.1/48kHz C LK P O n XTO XTI C LK N O n S C LK SDAT IR Q A C LK R ASYNR AD ATR AD ATM A C LK P ASYNP AD ATP Order Information Part Number: TW2865 Package: 128 pin LQFP Video Encoder NTSC/PAL Video Encoder CVBS and S-video Support Other Features VYOU T DAC D igital V ideo E nc oder VC OU T DAC E N C LK E D[7:0] 2x/4x analog clock PLL for 108MHz clock output Supports a two-wire serial host interface 1.8V Supply Low power consumption © 2009 Intersil Americas Inc. All Rights Reserved. The following are trademarks or registered trademarks of Intersil Americas Inc.: Intersil, Intersil logo, “i” and Design. All other trademarks are the property of the respective trademark owners. Techwell www.intersil.com