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H.264 Coding ntawm tus tshiab yees

Shenzhen Mine Technology Co., Ltd | Updated: May 06, 2016

Siv H.264 video compression algorithm thiab H.263, thiab MPEG-4 zoo, raws li mixed coding txoj kev, uas siv lub intra-thiab coding (tso) interframe coding (Inter) ob encoding hom. Piv nrog rau tus txheej txheem teev, thiaj li yuav zoo coding efficiency, compression piv thiab duab zoo, H.264 encoding rau tus tshiab yees li nram no:

(1) H.264 video coding uas muaj nqaij video coding txheej mus raws li lub zog (VCL, Video Coding txheej) thiab lub network abstraction txheej (NAL, Abstraction txheej ntawm Network) ob txheej. VCL siv mus ua kom tiav cov co compressed video sequences, NAL rau hom ntaub ntawv txheem video uas yog qhia tej lus header rau ntau hom kev kis tau tus mob tawm thiab cia.

(2) lawm twv ua ntej tso, uas muaj ntau yam spatial macro-thaiv 4 x 4 forecasts thiab rau thaj av tiaj tus kuj ntawd txog lub hnub nyoog 16 xyoo x 16 qauv, cov qub 9 yam li twv ua ntej, uas muaj 4 hom kev twv ua ntej.

(3) lub interframe twv ua ntej siv ntau hom kev partitioning, cov qauv uas sau tseg nyob hauv tib 7 thiab rho los thaiv segmentation (16 x 16, thiab 16 x 8, thiab 8 x 16) thiab thaiv macro ya (8 x 8, thiab 8 x 4, thiab 4 x 8, thiab 4 x 4). Thaum uas siv cov blocks me me thiab adaptive coding hom twv ua ntej residual nqi nyiaj ntawm cov ntaub ntawv yuav raug txo, li no ntxiv lawm lub ntsis tus nqi txo.

(4) mob npaws precision raws li tus neeg 1/4-pixel suab xwm.

(5) tus twv ua ntej siv tej ncej. Interframe coding, tau muaj 5 yam ntas of siv.


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