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ADV7194 数据表(PDF) 11 Page - Analog Devices |
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ADV7194 数据表(HTML) 11 Page - Analog Devices |
11 / 69 page ADV7194 –11– REV. 0 DETAILED DESCRIPTION OF FEATURES Clocking Single 27 MHz Clock Required to Run the Device 4 Oversampling with Internal 54 MHz PLL Square Pixel Operation Advanced Power Management Programmable Video Control Features Digital Noise Reduction Black Burst Signal Generation Pedestal level Hue, Brightness, Contrast and Saturation Clamping Output signal VBI (Vertical Blanking Interval) Subcarrier Frequency and Phase LUMA Delay CHROMA Delay Gamma Correction Luma and Chroma Filters Luma SSAF (Super Subalias Filter) Average Brightness Detection Field Counter Interlaced/Noninterlaced Operation Complete On-Chip Video Timing Generator Programmable Multimode Master/Slave Operation CGMS (Copy Generation Management System) WSS (Wide Screen Signaling) Closed Captioning Support Teletext Insertion Port (PAL-WST) 2-Wire Serial MPU Interface (I2C Compatible and Fast I2C) I 2C Registers Synchronized to VSYNC I N T E R P O L A T O R MODULATOR AND HUE CONTROL BRIGHTNESS CONTROL AND ADD SYNC AND INTERPOLATOR SATURATION CONTROL AND ADD BURST AND INTERPOLATOR PROGRAMMABLE LUMA FILTER AND SHARPNESS FILTER PROGRAMMABLE CHROMA FILTER SIN/COS DDS BLOCK REAL-TIME CONTROL CIRCUIT SCRESET/RTC/TR I N T E R P O L A T O R M U L T I P L E X E R YUV-TO-RGB MATRIX AND YUV LEVEL CONTROL BLOCK Y0–Y9 Cb0–Cb9 Cr0–Cr9 10-BIT DAC 10-BIT DAC 10-BIT DAC DAC CONTROL BLOCK 10-BIT DAC 10-BIT DAC 10-BIT DAC DAC CONTROL BLOCK DAC A DAC B DAC C VREF RSET2 COMP2 DAC D DAC F DAC E RSET1 COMP1 DNR AND GAMMA CORRECTION 10 10 10 V U Y YCrCb- TO- YUV MATRIX 10 10 10 V U Y PLL DEMUX 10 10 10 TELETEXT INSERTION BLOCK VIDEO TIMING GENERATOR CGMS/WSS AND CLOSED CAPTIONING CONTROL I2C MPU PORT ALSB SDA SCL PAL_NTSC VSO/CLAMP CSO_HSO HSYNC VSYNC BLANK RESET TTX TTXRQ P0 P15 CLKIN CLKOUT ADV7194 Figure 5. Detailed Functional Block Diagram GENERAL DESCRIPTION The ADV7194 is an integrated Digital Video Encoder that con- verts digital CCIR-601/656 4:2:2 10-bit (or 20-bit or 8-/16-bit) component video data into a standard analog baseband television signal compatible with worldwide standards. Additionally there is the possibility to input video data in 3 × 10-bit YCrCb progres- sive scan format to facilitate interfacing devices such as progressive scan systems. There are six DACs available on the ADV7194, each of these DACs is capable of providing 4.33 mA of current. In addition to the composite output signal there is the facility to output S- Video (Y/C Video), RGB Video, and YUV Video. All YUV formats (SMPTRE/EBU N10, MII or Betacam) are supported. The on-board SSAF (Super Subalias Filter) with extended luminance frequency response and sharp stopband attenuation enables studio quality video playback on modern TVs, giving optimal horizontal line resolution. An additional sharpness control feature allows high-frequency enhancement on the lumi- nance signal. SUBTRACT SIGNAL IN THRESHOLD RANGE FROM ORIGINAL SIGNAL FILTER OUTPUT >THRESHOLD? FILTER OUTPUT< THRESHOLD INPUT FILTER BLOCK MAIN SIGNAL PATH NOISE SIGNAL PATH Y DATA INPUT DNR OUT ADD SIGNAL ABOVE THRESHOLD RANGE TO ORIGINAL SIGNAL DNR CONTROL BLOCK SIZE CONTROL BORDER AREA BLOCK OFFSET GAIN CORING GAIN DATA CORING GAIN BORDER DNR SHARPNESS MODE FILTER OUTPUT <THRESHOLD? FILTER OUTPUT> THRESHOLD INPUT FILTER BLOCK MAIN SIGNAL PATH NOISE SIGNAL PATH Y DATA INPUT DNR OUT DNR CONTROL BLOCK SIZE CONTROL BORDER AREA BLOCK OFFSET GAIN CORING GAIN DATA CORING GAIN BORDER DNR MODE Figure 6. Block Diagram for DNR Mode and DNR Sharp- ness Mode |
类似零件编号 - ADV7194 |
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类似说明 - ADV7194 |
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