Title :
A study on transmission of low bit-rate coded video over radio links
Author :
Watanabe, Kazuhiro ; Masaki, Shoichi ; Shinoda, Mayumi ; Kurobe, Akio
Author_Institution :
Inf. & Commun. Technol. Lab., Matsushita Electr. Ind. Co. Ltd., Kadoma, Japan
Abstract :
Reports on a new method to transmit video signals over the digital cordless telephone system. Employing a video coding system H.261, a new coding control method optimized to visual characteristics, and a method developed to prevent broad frame skipping due to burst errors particular to mobile communication systems, are proposed. Though the spatial resolution (quantization-step) and the time resolution (coding frame-rate) are in a trade-off relationship, the coding control system is developed from the view point of visually optimum frame-rate and quantization step size derived from a subjective evaluation experiment. It is also shown that visually undesirable broad frame skipping can be prevented by providing a preframe buffer in the coding system
Keywords :
cordless telephone systems; digital radio; image coding; quantisation (signal); video coding; video signals; visual communication; broad frame skipping; burst errors; coding control method; coding frame-rate; digital cordless telephone system; low bit-rate coded video; mobile communication systems; preframe buffer; quantization-step; radio links; spatial resolution; time resolution; video coding system H.261; video signals; visual characteristics; Communication system control; Control systems; Error correction; Mobile communication; Optimization methods; Signal resolution; Size control; Spatial resolution; Telephony; Video coding;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345247
