h.264 - IDR and non IDR difference -

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what difference between idr , non idr frames?

what "coded slice of non idr picture" , "coded slice data partition a", "coded slice data partition b", "coded slice data partition c", "coded slice of idr picture" ?

idr, slices, partitioning - have them defined formally right there in specification:

3 definitions

3.62 instantaneous decoding refresh (idr) picture: coded picture in slices or si slices causes decoding process mark reference pictures "unused reference" after decoding idr picture. after decoding of idr picture following coded pictures in decoding order can decoded without inter prediction picture decoded prior idr picture. first picture of each coded video sequence idr picture.

3.27 coded picture: coded representation of picture. coded picture may either coded field or coded frame. coded picture collective term referring primary coded picture or redundant coded picture, not both together.

3.136 slice: integer number of macroblocks or macroblock pairs ordered consecutively in raster scan within particular slice group. primary coded picture, division of each slice group slices partitioning. although slice contains macroblocks or macroblock pairs consecutive in raster scan within slice group, these macroblocks or macroblock pairs not consecutive in raster scan within picture. addresses of macroblocks derived address of first macroblock in slice (as represented in slice header) , macroblock slice group map.

3.137 slice data partitioning: method of partitioning selected syntax elements syntax structures based on category associated each syntax element.


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