Multimedia processing and transport for the wireless personal terminal scenario

摘要: This paper presents an exploratory view of multimedia processing and transport issues for the wireless personal terminal scenario. In this scenario, portable computing devices are used to access video/voice/data information communication services over a broadband network infrastructure. System architecture considerations discussed, leading identification specific approach based on unified wired + ATM network, general-purpose CPU terminal, new software foe efficient media handling quality-of-service (QoS) support. The recently proposed 'wireless ATM' concept is outlined, associated interface at characterized in terms available service types (ABR, VBR, CBR) QoS. A MPEG video delivery applications with VBR decoding then examined further detail. Recognizing that represents major performance bottleneck system, encoder quantizer control joint bit-rate decoder computation constraints introduced. Experimental results given both usage parameter (UPC) encoder, demonstrating improvements delivered quality relative conventional case without such controls.© (1995) COPYRIGHT SPIE--The International Society Optical Engineering. Downloading abstract permitted use only.