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ADV7191KSTZ Scheda tecnica(PDF) 11 Page - Analog Devices |
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ADV7191KSTZ Scheda tecnica(HTML) 11 Page - Analog Devices |
11 / 72 page ADV7190/ADV7191 –11– REV. B 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 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 TTXREQ P0 P15 CLKIN CLKOUT ADV7190/ADV7191 Figure 4. Detailed Functional Block Diagram 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 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) Macrovision 7.1 Rev (ADV7190 Only) Closed Captioning Support Teletext Insertion Port (PAL-WST) 2-Wire Serial MPU Interface I 2C Registers Synchronized to VSYNC (continued from page 1) GENERAL DESCRIPTION The ADV7190/ADV7191 is an integrated Digital Video Encoder that converts digital CCIR-601/656 4:2:2 8-bit or 16-bit com- ponent video data into a standard analog baseband television signal compatible with worldwide standards. Six DACs are available on the ADV7190/ADV7191, each of which 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 (Betacam, MII and (SMPTE/EBU N10) are supported. Digital Noise Reduction allows improved picture quality in remov- ing low amplitude, high frequency noise. The block diagram below shows the DNR functionality in the two modes available. 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 5. Block Diagram for DNR Mode and DNR Sharpness Mode |
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