Transmission of 4:2:2 formatted video on SDH/PDH networks

• Published in: International Broadcasting Convention (IBC) pp. 565 - 569
• Main Author: Nielsen, O.S
• Format: Conference Proceeding
• Language: English
• Published: London IEE 1996
• Subjects: Codes; Communication switching; Optical information, image and video signal processing; Other numerical methods; Speech and video codecs; discrete cosine transforms; DCT processing; video codecs; 140 Mbit/s; data rate; SONET networks; 155 Mbit/s; video coding; bit rate reduction; RE Technology; 4:2:2 formatted video transmission; PDH networks; SONET; synchronous digital hierarchy; SDH networks; transform coding; broadcast industry; 270 Mbit/s
• ISBN: 0852966636; 9780852966631
• DOI: 10.1049/cp:19960870

In various stages of the processes in the broadcast industry and in high-quality contribution, the questions of transparency and room for further processing, are of utmost importance. In this environment, the 4:2:2 video format plays an important role, and the increased need for networking calls for special attention to 4:2:2 compatible video codecs. The data rate of the 4:2:2 format is 270 Mbit/s, and a 4:2:2 signal may therefore not be transmitted on the widespread 140 Mbit/s PDH or on the increasingly important 155 Mbit/s SDH/SONET networks without bit rate reduction (BRR). However, by means of a moderate BRR of about 2.1, it is considered possible to keep a codec nearly transparent, even with multiple cascadings. The paper demonstrates a video codec based on DCT processing which allows transmission of 4:2:2 formatted video on SDH, SONET and PDH networks, and discusses the results of development at RE Technology.