Compatibility Ppt
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This document discusses compatibility in color television systems. It defines forward and backward compatibility. The color television signal must produce a normal black and white picture on a monochrome receiver without modification, and a color receiver must produce black and white from a monochrome signal, which is called reverse compatibility. The color system must meet several requirements to achieve compatibility, including using the same bandwidth and carrier frequencies as monochrome, transmitting the same luminance information, and encoding color in a way that does not affect monochrome receivers. Examples given of compatible systems include NTSC being backward compatible with black and white TVs, and DVD drives playing CDs.
Compatibility Ppt
- 1. Department of Electronics and Telecommunication Engineering Submitted By:- Akash J. Shahu 3rd Year | 5th Semester | Section ‘C’ TAE 4 Technical Presentation ‘COMPATIBILITY’ Guided By:- Prof. Bhushan Vidhale
- 2. Introduction • Regular colour TV broadcast could not be started till 1954 because of the stringent requirement of making colour TV compatible with the existing monochrome system. • Types Forward compatibility Backward compatibility
- 3. Compatibility • The colour television signal must produce a normal black and white picture on a monochrome receiver without any modification of the receiver circuitry. • A colour receiver must be able to produce a black and white picture from a normal monochrome signal. This is referred to as reverse compatibility.
- 4. Requirements • It should occupy the same bandwidth as the corresponding monochrome signal. • The location and spacing of picture and sound carrier frequencies should remain the same. • The colour signal should have the same luminance (brightness) information as would a monochrome signal, transmitting the same scene.
- 5. Requirements • The composite colour signal should contain colour information together with the ancillary signals needed to allow this to be decoded. • The colour information should be carried in such a way that it does not affect the picture reproduced on the screen of a monochrome receiver. • The system must employ the same deflection frequencies and sync signals as used for monochrome transmission and reception.
- 6. Examples • The NTSC colour broadcast system was engineered by RCA to be backward compatible with black-and-white NTSC television sets. • DVB-T MPEG4 television tuners can also decode MPEG2 signal. • Most DVD drives are able to play standard CDs. • Numerous video game consoles are backward compatible and are able to play the games created for predecessor consoles.
- 7. THANKS