A system of distributing video and/or audio information employs digital signal processing to achieve high rates of data compression. The compressed and encoded audio and/or video information is sent over standard telephone, cable or satellite broadcast channels to a receiver specified by a subscriber of the service, preferably in less than real time, for later playback and optional recording on standard audio and/or video tape.

Audio and video transmission and receiving system

INTRODUCTION For the last 25 years video has been transported in the broadcast and professional environment using the Serial Digital Interface (SDI) over coaxial cable. The success of this technology has been phenomenal, with data rates up to 3 Gb/s transported for many tens, or even hundreds, of metres over cable that looks no different from that designed for 4.2 MHz of NTSC. But there are always requirements for longer runs, and digital signals over cable have a very well defined quality cutoff point with cable length.

P. S. Venkatesan

Papers

Transport of Wideband Data and Video Services over a Single Mode Fiber at 1.3 Micron Wavelength.