Title :
Quality of band-compressed TV services
Author :
Murakami, Hitomi ; Hashimoto, Hideo ; Hatori, Yoshinori
Author_Institution :
Res. & Dev. Labs., KDD, Tokyo, Japan
Abstract :
Some typical digital high-efficiency coding algorithms applied to the different types of digital transmission systems are discussed, and the resultant picture quality degradation is examined. Techniques for bit-rate reduction, which is fundamental to high-efficiency coding, are described, namely interframe prediction and conditional picture replenishment, hybrid coding using the discrete cosine transform, and vector quantization. Pulse-code-modulation noise, coding distortion, and channel coding error are considered. Subjective and objective methods for evaluating coded pictures are described.<>
Keywords :
bandwidth compression; digital communication systems; encoding; picture processing; telecommunication services; television broadcasting; television reception; television systems; HDTV; PCM noise; band-compressed TV services; bandwidth compression; bit-rate reduction; channel coding error; coded pictures evaluation; coding distortion; conditional picture replenishment; digital coding algorithms; digital transmission systems; discrete cosine transform; hybrid coding; interframe prediction; objective methods; picture quality degradation; subjective methods; vector quantization; Bit rate; Degradation; Digital images; Discrete cosine transforms; Frequency; Humans; Image coding; Redundancy; TV; Videoconference;
Journal_Title :
Communications Magazine, IEEE
