Digital HDTV compression using parallel motion-compensated transform coders
| Autor: | R.L. Schmidt, Hsueh-Ming Hang, Hemant Bheda, Riccardo Leonardi, J.H. Othmer, B.G. Haskell |
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| Rok vydání: | 1991 |
| Předmět: |
High-definition television
Theoretical computer science Image quality business.industry Computer science Quantization (signal processing) Bandwidth compression subband coding Data_CODINGANDINFORMATIONTHEORY motion-compensated video coding Videotelephony Parallel processing (DSP implementation) HDTV video compression Media Technology Telephony Electrical and Electronic Engineering business Computer hardware |
| Zdroj: | IEEE Transactions on Circuits and Systems for Video Technology. 1:210-221 |
| ISSN: | 1051-8215 |
| DOI: | 10.1109/76.97976 |
| Popis: | The authors suggest a parallel processing structure using the proposed international standard for visual telephony (CCITT P*64 kbs standard) as processing elements, to compress digital high definition television (HDTV) pictures. The basic idea is to partition an HDTV picture, in space or in frequency, into smaller sub-pictures and then compress each sub-picture using a CCITT P*64 kbs coder. This seems to be a cost-effective solution to the HDTV hardware. Since each sub-picture is processed by an independent coder, without coordination these coded sub-pictures may have unequal picture quality. To maintain a uniform quality HDTV picture, the following two issues are studied: sub-channel control strategy (bits allocated to each sub-picture); and quantization and buffer control strategy for individual sub-picture coders. Algorithms to resolve these problems and their computer simulations are presented. > |
| Databáze: | OpenAIRE |
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