130 Mbit/s (H4 rate) HDTV codec based on the DCT algorithm

Kinoshita, T.; Nakahashi, T.; Eto, Yoshizumi

doi:10.1049/el:19900802

Cited by 6 publications

(1 citation statement)

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“…Recently, many simulation studies and prototype codecs have been reported to provide HDTV secondary distribution services at bit rates of 100-160 Mb/s [11- [4]. However, some applications, such as HDTV conferencing, require lower and variable-bit-rate coding algorithms to improve transmission cost and picture quality.…”

Section: Introductionmentioning

confidence: 99%

Variable-bit-rate HDTV codec with ATM-cell-loss compensation

Kinoshita

Nakahashi

Maruyama

1993

IEEE Trans. Circuits Syst. Video Technol.

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A variable-bit-rate high-definition television (HDTV) coding algorithm based on motion-adaptive, discrete cosine transform (DCT) is investigated for asynchronous transfer mode (ATM) environments in broadband integrated-services digital networks (B-ISDN). The proposed algorithm effectively reduces the bit rate, in particular, for HDTV-picture sources with little motion. Adaptive two-layered coding, an ATM cell matrix for error correction, and a block interleave for error concealment are proposed to keep picture quality high by compensating for ATM cell loss. A new feed-fomard control scheme for variable-length coding (VLC), a multimode quantization that restricts peak bit rate and average bit rate, is also proposed for traffic control. Experimental hardware is shown to reduce the coding bit rate for pictures of HDTV conference applications to peak bit rate of 65 Mb/s and an average bit rate of 10-20 Mb / s in ATM environments.

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Section: Introductionmentioning

confidence: 99%