| 摘要 |
<p>A method of processing video or image data in a block-based video or image communication system (200, 300) includes the step of arranging (352, 392) the data in irregular shaped blocks (210, 220, 230, 240) for reducing a visible effect of artefacts introduced into a transmitted and decoded image. A video communication system and unit are also described. <??>By utilising irregular shaped blocks (210, 220, 230, 240) the shape appears random, while retaining some spatial correlation. This gives a better-perceived image quality at the decoder, when subjected to compression artefacts or transmission errors. This enables either more compression to be applied to achieve the same subjective image quality, or an improved subjective quality for the same amount of image compression. Also, any errors introduced into the compressed image data by transmission have a reduced visual effect on the decoded image. <IMAGE></p> |
