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ADV7401 Datasheet(PDF) 13 Page - Analog Devices |
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ADV7401 Datasheet(HTML) 13 Page - Analog Devices |
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13 / 20 page  ADV7401 Rev. B | Page 13 of 20 DETAILED FUNCTIONALITY ANALOG FRONT END • Four high quality 10-bit ADCs enable true 8-bit video decoder • 12 analog input channel mux enables multisource connection without the requirement of an external mux • Four current and voltage clamp control loops ensure any dc offsets are removed from the video signal • SCART functionality and SD RGB overlay on CVBS controlled by fast blank input • Four internal antialias filters to remove out-of-band noise on standard definition input video signals SDP PIXEL DATA OUTPUT MODES • 8-bit ITU-R BT.656 4:2:2 YCrCb with embedded time codes and/or HS, VS, and FIELD • 16-bit YCrCb with embedded time codes and/or HS, VS, and FIELD • 24-bit YCrCb with embedded time codes and/or HS, VS, and FIELD CP PIXEL DATA OUTPUT MODES • Single data rate (SDR) 8-bit 4:2:2 YCrCb for 525i, 625i • Single data rate (SDR) 16-bit 4:2:2 YCrCb for all standards • Single data rate (SDR) 24-bit 4:4:4 YCrCb/RGB for all standards • Double data rate (DDR) 8-bit 4:2:2 YCrCb for all standards • Double data rate (DDR) 12-bit 4:4:4 YCrCb/RGB for all standards COMPOSITE AND S-VIDEO PROCESSING • Support for NTSC (J, M, 4.43), PAL (B, D, I, G, H, M, N, 60) and SECAM B/D/G/K/L standards in the form of CVBS and S-video • Superadaptive 2D 5-line comb filters for NTSC and PAL give superior chrominance and luminance separation for composite video • Full automatic detection and autoswitching of all worldwide standards (PAL/NTSC/SECAM) • Automatic gain control with white peak mode ensures the video is always processed without loss of the video processing range • Adaptive digital line length tracking (ADLLT™) • Proprietary architecture for locking to weak, noisy, and unstable sources from VCRs and tuners • IF filter block compensates for high frequency luma attenuation due to tuner SAW filter • Chroma transient improvement (CTI) • Luminance digital noise reduction (DNR) • Color controls include hue, brightness, saturation, contrast, and Cr and Cb offset controls • Certified Macrovision copy protection detection on composite and S-video for all worldwide formats (PAL/NTSC/SECAM) • 4× oversampling (54 MHz) for CVBS, S-video, and YUV modes • Line-locked clock output (LLC) • Letterbox detection supported • Free-run output mode provides stable timing when no video input is present • Vertical blanking interval data processor TeleText Video Programming System (VPS) Vertical Interval Time Codes (VITC) Closed captioning (CC) and extended data service (EDS) Wide screen signaling (WSS) Copy generation management system (CGMS) Gemstar™ 1×/2× electronic program guide compatible • Clocked from a single 28.63636 MHz crystal • Subcarrier frequency lock (SFL) output for downstream video encoder • Differential gain typically 0.5% • Differential phase typically 0.5° |
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