Development and Performance Evaluation of Low Delay Encoding Scheme of Video Coding for Digital Broadcasting

• Published in: Eizō Jōhō Media Gakkaishi Vol. 62; no. 4; pp. 578 - 586
• Main Authors: Okada, Shinichi, Motoyama, Nobuaki, Ohara, Eiji, Ohsawa, Atsumasa, Ono, Midori, Hattori, Shinichi, Asano, Kenichi
• Format: Journal Article
• Language: Japanese; English
• Published: The Institute of Image Information and Television Engineers 2008
• Subjects: MPEG-2
• ISSN: 1342-6907; 1881-6908
• DOI: 10.3169/itej.62.578

We have developed a low delay video coding technique for use in digital broadcasting of HDTV format pictures. We developed a delay model that analyzes processing time of requisites for video codec. This delay model explicates a general codec delay from encoding-top to decoding-end in 600.8ms and mainly depends on preprocessing and sending and receiving buffers. Based on this model, we develop a technique that reduces the delay of 600.8 to 250ms. We tested our technique using a hardware encoder that operated on a FPGA platform at an operating frequency of 135MHz. This encoder showed a delay of 252ms using a consumer set top box as a decoder.