digital infotainment products Digital Video Encoder Bt860/861 High-Performance Multisource Video for a Wide Range of Systems Conexant’s Bt860 and Bt861 are multiport digital video encoders with pixel synchronization and per-pixel blending capabilities. The three 8-bit YCrCb data ports allow for a variety of video and graphics overlay configurations useful in video set-top box applications. The Bt860/861 is designed specifically for video systems requiring the generation of simultaneous composite, S-video (Y/C) and either component YUV or RGB (SCART) video signals. High-performance video combined with the right set of features make the Bt860/861 a versatile device for almost any video system. 10-bit DACs provide the clear, lifelike video required for modern satellite and cable television set-top boxes, Super VCD and DVD players, PC add-in cards, video conferencing systems and digital cameras. Several power conservation modes extend portable system battery life and help reduce system heating. New televisions and media which make use of wide screen 16:9 aspect ratios are also supported by the Bt860/861 to provide the best flexibility, performance and functionality. Distinguishing Features • Six 10-bit DACs with individual power management • Simultaneous output of RGB, S-video and CVBS, or YUV, S-video and CVBS • Current drive output DACs for superior video quality and reduced system cost • Four output sharpness filtering options (0, 1, 2, 3.5 dB gain) • Programmable adjustment of brightness, contrast, color saturation and hue digital infotainment products Digital Video Encoder Bt860/861 Multisource video is a key feature of the Bt860/861. The primary video port (P) is designed to accept both digital video and graphics overlay content from an MPEG video decoder or OSD ICs. This input stream can be either ITU-R BT.601 or 656 in format — as is typically generated by MPEG decoder ICs. The second video port (VID) will accept an alternate digital video stream from a video decoder, such as Conexant’s Video Stream family of devices. The third port (OSD) may be used for dedicated graphics overlay devices, such as providing a higherquality user interface or superior on-screen titles. Alternatively, a second MPEG decoded stream could also be the input to the OSD port for use with multiple MPEG decoder ICs. A pixel synchronization mechanism ensures proper timing between the three ports to Bt860/861 functional block diagram deliver the highest-video quality. The block diagram below illustrates an example of the typically used components. The light gray shaded how the Bt860/861 may be used in a TV set-top box, box represents the optional components used for video DVD player, or PC card. The white boxes represent capture. The medium grey shaded box represents the optional graphic processor IC, which may be added for enhanced OSD or superior user interface. Worldwide Standards Supported Worldwide video standards are supported, including NTSC-M (North America, Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60, and SECAM. The Bt860 and Bt861 are pin and functionally identical, except the Bt861 also contains Macrovision 7.X copy protection circuitry used in DVD players and TV set-top boxes. This permits all types of video systems to use the Bt860/861 and achieve truly high- Typical system functional block diagram performance video. What is a Video Encoder? A video encoder is an electronic integrated circuit (chip) which delivers the signal to your television from a DVD or video CD player, LaserDisc player, cable or satellite TV settop box, digital camera, video conferencing system, Internet browser or personal computer (PC). It is the chip which makes everyone’s favorite shows look bright, crisp, colorful Multiple Video Outputs for Televisions of All Varieties and clear. With today’s new digital video systems, TV The Bt860/861 provides analog luminance (Y) and chrominance (C) pictures can look their best when showing movies and information in the Y and C outputs for interfacing with equipment having S-Video inputs. Component video outputs for Y, and the sports from DVD and TV set-top boxes. color component signals (U and V) are available for use with the Video encoder chips today have the functions of four separate latest DVD players and high-performance televisions. Analog chips integrated into one single chip. These chips take the RGB video is also available to permit support of the European SCART/PeriTV interface. Composite analog video is output digital video information which is stored on DVD discs or simultaneously to interface with all types of televisions, and VCRs. digital camera memory cards, or transmitted to a satellite One composite analog output has a programmable luma delay to permit the synchronization of both luminance and chrominance dish TV receiver or cable tuner box, and convert it into the when video is transmitted via an RF modulator. A video multiplexer “old-fashioned” type of signal a TV requires. The video on the output permits tremendous flexibility of output signal configurations. A two-wire teletext (WST-B) interface is also encoder converts digital bits into analog electrical signals, included in the Bt860/861. The table below illustrates the various which instruct the TV what colors should be shown on the output configurations of the Bt860/861 DACs. screen and how bright or dark they should be. Better quality OUTMODE[2:0] 000 001 010 011 100 101 110 111 DAC A DAC B DAC Y C Y C Y C Y C CVBS CVBS_DLY CVBS CVBS_DLY CVBS CVBS_DLY Y C C DAC CVBS CVBS CVBS Y CVBS CVBS CVBS CVBS D DAC E Y R CVBS_DLY Y Y R CVBS_DLY CVBS_DLY DAC F V G CVBS C V G CVBS C U B CVBS C U B CVBS Y *Note: CVBS_DLY is the composite video signal with the luminance component delayed video encoder chips produce better quality video and make the images seem more lifelike and exciting. Video encoder technology has improved rapidly in recent years, allowing people to connect a variety of different video devices to their TVs and create the home entertainment I2C Interface systems of their dreams. These relatively inexpensive Bt860/861 registers are accessed via a two-wire Inter Integrated devices are one of the most critical components of modern Circuit (I2C) interface. Serial clock and data lines, SCL and SDA, are used to transfer data at a rate of 100 Kbps. These lines are used to access and program the internal registers of the device, video systems, and they have found widespread usage in business, home office, medical, security, professional video including the Macrovision registers of the Bt861. Deactivation of I2C communication is possible by asserting sleep or reset modes. studios, and all types of consumer video applications. features and specifications Implementation The Bt860/861 is packaged in an 80-pin Plastic Quad Flat Pack (PQFP) with a 16.95 x 17.45 mm body size. It requires only a minimum of discrete passive support components. It is ideal for low-cost, high-performance video systems and consumer electronics. World Headquarters Product Features • Six 10-bit DACs with individual power management • Simultaneous output of RGB, S-video, and CVBS, or YUV, S-video, and CVBS • Current drive output DACs for superior video quality and reduced system cost • Dynamic video load sense circuitry for reduced power operation • Four output sharpness filtering options (0, 1, 2, 3.5 dB gain) • Programmable adjustment of brightness, contrast, color saturation, and hue • Glueless interface with a video decoder output supports locking to a digital video input stream • Three 8-bit 4:2:2 YCrCb inputs for simultaneous digital video and graphics overlays • Teletext encoding (WST system B) • Closed Caption and Extended Data Services encoding • On-board voltage reference for greater accuracy and stability • Reduced power modes • 400 KHz serial programming interface • Internal color bar generation for simplified systems testing • Macrovision 7.x copy protection circuitry (Bt861 only) • Housed in a compact 80-pin MQFP package Applications • Digital satellite television receivers (DBS/DVB/DSS) • DVD players • ITU-R BT.656-4, ITU-R BT.601-5 and square pixel digital video input options • Internet appliances • 2X oversampling and internal filtering for reduced cost • Video game appliances • Multiple aspect ratio output support (VARIS II, WSS 4:3, 14:9, 16:9) • Programmable luma delay (two-channels) • Master or slave video timing with programmable HSYNC delay • Interlaced/noninterlaced operation Conexant Systems, Inc. 4311 Jamboree Road Newport Beach, CA 92660-3007 Phone: (949) 483-4600 Fax 1: (949) 483-4078 Fax 2: (949) 483-4391 Americas U.S. Northwest/Pacific Northwest – Santa Clara Phone: (408) 249 -9696 Fax: (408) 249 -7113 U.S. Southwest – Los Angeles Phone: (805) 376 -0559 Fax: (805) 376 - 8180 • Digital and analog cable television receivers • Worldwide NTSC, PAL, PAL-60 and SECAM video standard outputs • 3.3V single supply voltage with 5V tolerant inputs Further Information [email protected] (800) 854-8099 (North America) (949) 483-6996 (International) Order # 100541B 00-0415 Digital Infotainment Printed in USA • DVD PC add-in cards with TV output • PC video editing cards • Video conferencing systems Related Products • Bt835 • Bt852 • Bt856/857 • Bt864A/865A • Bt866/867 U.S. Southwest – Orange County Phone: (949) 483-9119 Fax: (949) 483-9090 U.S. Southwest – San Diego Phone: (858) 713-3374 Fax: (858) 713-4001 U.S. North Central – Illinois Phone: (630) 773-3454 Fax: (630) 773 -3907 U.S. South Central – Texas Phone: (972) 733-0723 Fax: (972) 407- 0639 • Bt868/869 Conexant and the Conexant symbol are trademarks of Conexant Systems, Inc. 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