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BT864A /865A
Digital Video Encoder
High Performance YCrCb to NTSC/PAL Digital Video Encoders
Conexant's BT864A and Bt865A are designed for video systems that require the generation of high-quality composite, Y/C (S-video) or RGB (SCART) video signals from an 8- or 16-bit YCrCb video stream. Worldwide video standards are supported, including NTSC-M (N. America, Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), and PAL-Nc (Argentina).
The BT864A and Bt865A are pin-compatible and functionally identical, except the Bt865A can also output the MacrovisionTM version 7 anticopy algorithm. Either master or slave mode operation may be implemented to provide the highest video performance when interfaced with any MPEG decoder. CCIR 601 or square pixel video signals may be input to provide maximum flexibility in the system architecture.
Distinguishing Features
The BT864A/865A and other Conexant video encoders have been designed into numerous high-performance and high-volume consumer applications worldwide. These include satellite set-top boxes, DVD players, PC add-in kits, digital cameras, video CD players, video conferencing systems and other applications that demand the highest quality video.
* 8- or 16-bit 4:2:2 YCrCb inputs * NTSC-M/PAL/PAL-M/PAL-N/PAL-Nc video outputs * S-video/RGB (SCART)/CVBS outputs * CCIR 601 or square pixel operation * 2x oversampling * 10-bit DACs * Current output DACs for the highest video quality and reduced cost
digital
infotainment
products
BT864A/865A
Digital Video Encoder
Flexible Operation for a Wide Range of Video Systems
High-performance video combined with the right set of features make the BT864A/865A a versatile device for almost any video system. 10-bit DACs provide the high-resolution video required for modern satellite set-top boxes, DVD players, PC add-in cards, video conferencing systems and digital cameras. Several power conservation modes extend portable system battery life and help to reduce system heating. New televisions and media, which make use of wide screen 16:9 aspect ratios, are also supported by the BT864A/865A to provide the best flexibility, performance and functionality. The BT864A/865A accepts video data in a variety of ways: CCIR 601, NTSC, and PAL square pixel formats. This provides system designers with maximum flexibility. Either 3.3V or 5V operation is possible with the BT864A/865A to permit operation within any system environment. Horizontal sync and vertical sync may be configured as inputs (slave mode) or outputs (master mode). In addition to the normal blanking which occurs during Hsync and Vsync, blanking may be externally controlled during active video. The rise and fall times of sync, the burst envelope, and closed caption data are internally controlled.
Functional block diagram
What is a Video Encoder?
A video encoder is an electronic integrated circuit (chip) that delivers the signal to your television from a DVD or video CD player, LaserDisc player, cable or satellite TV set- top box, digital camera, video conferencing system, Internet browser or personal computer (PC). It is the chip that makes everyone's favorite shows look bright,
Analog luminance (Y) and chrominance (C) information is available on the Y and C outputs for interfacing to S-video equipment. The composite analog video signal is output simultaneously onto two outputs. This enables two simultaneous baseband composite video signals, or one output, to provide baseband composite video while the other drives an RF modulator. Programmable luminance delay (single-channel) permits the synchronization of both luminance and chrominance when video is transmitted to a television monitor via an RF modulator. Analog RGB is also available to allow for support of the European SCART/PeriTV interface. A two-wire teletext (WST-B) interface is also included in the BT864A/865A.
satellite dish TV receiver or cable tuner box, and convert it take the digital video information which is stored on DVD discs or digital camera memory cards, or transmitted to a Video encoder chips today have the functions of four separate chips integrated into one single chip. These chips crisp, colorful and clear. With today's new digital video systems,TV pictures can look their best when showing movies and sports from DVD and TV set-top boxes.
Macrovision anticopy circuitry is included in the Bt865A to support DVD and newer set-top box services. The BT864A is pin and function compatible with the Bt865A to permit video design and testing for applications that do require Macrovision circuitry and those that do not.
into the "old-fashioned" type of signal a TV requires. The video encoder converts digital bits into analog electrical signals, which tell the TV what colors should be shown on the screen and how bright or dark they should be. Better quality 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 systems of their dreams. These relatively inexpensive devices are one of the most critical components of modern video systems, and they have found widespread usage in
I2C Interface
BT864A/865A registers are accessed via a two-wire Inter-Integrated 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, including the Macrovision registers of the Bt865A. Deactivation of I2C communication is possible by asserting sleep or reset modes.
Implementation
The BT864A/865A is packaged in a 52-pin Plastic Quad Flat Pack (PQFP) with a 14 mm x 14 mm body size. It requires only a minimum of discrete passive support components. It is ideal for low-cost and high-performance video systems and consumer electronics.
business, home office, medical, security, professional video studios, and all types of consumer video applications.
features
and
specifications
Product Features
* 8- or 16-bit 4:2:2 YCrCb inputs * NTSC-M/PAL/PAL-M/PAL-N/PAL-Nc composite video outputs * S-video/RGB (SCART) outputs * CCIR 601 or square pixel operation * 2x oversampling * 10-bit DACs * Master or slave video timing * Auto mode detection function (slave mode) * Interlaced/noninterlaced operation * Macrovision 7 support (Bt865A only) * Closed caption encoding * Teletext encoding (WST system B) * I2C interface * On-board voltage reference * Power-down modes * 52-pin PQFP package * Programmable luma delay (single-channel) * 3.3V or 5V supply voltage * VARIS-II (16:9) aspect ratio support
Applications
* * * * * * * * Digital cable systems Satellite television set-top boxes (DBS/DSS) DVD players Video CD players Digital cameras Video conferencing systems PC add-on cards PC video editing
Further Information literature@conexant.com 1-800-854-8099 (North America) 33-14-906-3980 (International) DI.PB07 98-6221 Digital Infotainment Printed in USA Web Site www.conexant.com
China Phone: (86 2) 6361 2515 Fax: (86 2) 6361 2516 Hong Kong Phone: (852) 2827 0181 Fax: (852) 2827 6488 India Phone: (91 11) 692 4780 Fax: (91 11) 692 4712 Korea Phone: (82 2) 565 2880 Fax: (82 2) 565 1440
Related Products
* Bt835 * Bt852 * Bt856/857 * Bt860/861 * Bt866/867 * Bt868/869
World Headquarters
Conexant Systems, Inc. 4311 Jamboree Road P. O. Box C Newport Beach, CA 92658-8902 Phone: (949) 483-4600 Fax: (949) 483-6375 U.S. Florida/South America Phone: (727) 799-8406 Fax: (727) 799-8306 U.S. Los Angeles Phone: (805) 376-0559 Fax: (805) 376-8180 U.S. Mid-Atlantic Phone: (215) 244-6784 Fax: (215) 244-9292 U.S. North Central Phone: (630) 773-3454 Fax: (630) 773-3907 U.S. Northeast Phone: (978) 692-7660 Fax: (978) 692-8185 U.S. Northwest/Pacific West Phone: (408) 249-9696 Fax: (408) 249-7113 U.S. South Central Phone: (972) 733-0723 Fax: (972) 407-0639 U.S. Southeast Phone: (919) 858-9110 Fax: (919) 858-8669 U.S. Southwest Phone: (949) 483-9119 Fax: (949) 483-9090
Europe Headquarters
Conexant Systems France Les Taissounieres B1 1681 Route des Dolines BP 283 06905 Sophia Antipolis Cedex France Phone: (33 4) 93 00 33 35 Fax: (33 4) 93 00 33 03 Europe Central Phone: (49 89) 829 1320 Fax: (49 89) 834 2734 Europe Mediterranean Phone: (39 02) 9317 9911 Fax: (39 02) 9317 9913 Europe North Phone: (44 1344) 486 444 Fax: (44 1344) 486 555 Europe South Phone: (33 1) 41 44 36 50 Fax: (33 1) 41 44 36 90
Conexant and the Conexant symbol are trademarks of Conexant Systems, Inc.
Middle East Headquarters
Conexant Systems Commercial (Israel) Ltd. P. O. Box 12660 Herzlia 46733, Israel Phone: (972 9) 952 4064 Fax: (972 9) 951 3924
Japan Headquarters
Conexant Systems Japan Co., Ltd. Shimomoto Building 1-46-3 Hatsudai, Shibuya-ku,Tokyo 151-0061 Japan Phone: (81 3) 5371-1567 Fax: (81 3) 5371-1501
APAC Headquarters
Conexant Systems Singapore, Pte. Ltd. 1 Kim Seng Promenade Great World City #09-01 East Tower Singapore 237994 Phone: (65) 737 7355 Fax: (65) 737 9077 Australia Phone: (61 2) 9869 4088 Fax: (61 2) 9869 4077
Taiwan Headquarters
Conexant Systems,Taiwan Co., Ltd. Room 2808 International Trade Building 333 Keelung Road, Section 1 Taipei 110,Taiwan, ROC Phone: (886 2) 2720 0282 Fax: (886 2) 2757 6760

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