Transform coding of DCT coefficients in video encoder
The redundancy among discrete cosine transform（DCT） coefficients in video encoder was found very strong,a method for subband decomposition and transform coding was proposed.Each 8×8 DCT spectrum date of macroblock was regrouped to gather the same frequency bands.The Hadamard transform function was u...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2008-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74655827/ |
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| _version_ | 1841537513423896576 |
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| author | WANG Zhong-yuan HU Rui-min TIAN Gang LI Ming |
| author_facet | WANG Zhong-yuan HU Rui-min TIAN Gang LI Ming |
| author_sort | WANG Zhong-yuan |
| collection | DOAJ |
| description | The redundancy among discrete cosine transform（DCT） coefficients in video encoder was found very strong,a method for subband decomposition and transform coding was proposed.Each 8×8 DCT spectrum date of macroblock was regrouped to gather the same frequency bands.The Hadamard transform function was used and orthogonal integer Ha-damard transform formula was derived.Simulation results shows that the proposed approach reduces the spectrum redun-dancy and improves the compression efficiency further compared with conventional DCT coder,however the PSNR loss are almost invisible.This work is expected to contribute to the under drafted international video compression standard H.265. |
| format | Article |
| id | doaj-art-0efb3386c34245698800d72ff2bb804b |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2008-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-0efb3386c34245698800d72ff2bb804b2025-01-14T08:32:32ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2008-01-0113313674655827Transform coding of DCT coefficients in video encoderWANG Zhong-yuanHU Rui-minTIAN GangLI MingThe redundancy among discrete cosine transform（DCT） coefficients in video encoder was found very strong,a method for subband decomposition and transform coding was proposed.Each 8×8 DCT spectrum date of macroblock was regrouped to gather the same frequency bands.The Hadamard transform function was used and orthogonal integer Ha-damard transform formula was derived.Simulation results shows that the proposed approach reduces the spectrum redun-dancy and improves the compression efficiency further compared with conventional DCT coder,however the PSNR loss are almost invisible.This work is expected to contribute to the under drafted international video compression standard H.265.http://www.joconline.com.cn/zh/article/74655827/DCT coefficientsvideo codinginteger Hadamard transform |
| spellingShingle | WANG Zhong-yuan HU Rui-min TIAN Gang LI Ming Transform coding of DCT coefficients in video encoder Tongxin xuebao DCT coefficients video coding integer Hadamard transform |
| title | Transform coding of DCT coefficients in video encoder |
| title_full | Transform coding of DCT coefficients in video encoder |
| title_fullStr | Transform coding of DCT coefficients in video encoder |
| title_full_unstemmed | Transform coding of DCT coefficients in video encoder |
| title_short | Transform coding of DCT coefficients in video encoder |
| title_sort | transform coding of dct coefficients in video encoder |
| topic | DCT coefficients video coding integer Hadamard transform |
| url | http://www.joconline.com.cn/zh/article/74655827/ |
| work_keys_str_mv | AT wangzhongyuan transformcodingofdctcoefficientsinvideoencoder AT huruimin transformcodingofdctcoefficientsinvideoencoder AT tiangang transformcodingofdctcoefficientsinvideoencoder AT liming transformcodingofdctcoefficientsinvideoencoder |