Patents : Smooth image

时间:2019-02-27 04:06:02166网络整理admin

By Barry Fox THE Tomb Raider computer game has a lot going for it, not least a feisty female heroine and slick video sequences. Now the technique used for these video effects has been patented, and may find its way into videophones. Patent application WO 95/16325 reveals the secret. The game codes every video frame as it is played. Other computer video software loads and codes prior to playing, which can produce a jerky playback. The technique breaks every video frame into blocks of 64 pixels. Each block is stored and compared with the corresponding block in the next frame. Unchanged blocks are described with a one-off signal. After that the encoder records a bare minimum of signals to represent changes. Small changes are ignored until enough accumulate to make them worth recording. These short cuts reduce the number of bits needed to convey moving video to around a million a second,