Patent ID: 8199814

Claim:
A method of Rate-QP estimation for an I picture, comprising: (a) providing an input group of pictures (GOP); (b) selecting an input I picture within the input group of pictures; and (c) outputting, to a computer readable medium, a bit rate corrected Rate-QP, R(QP), for the input I picture, comprising: calculating an intra luma (Y) Rate-QP estimate from an intra luma (Y) histogram; calculating an intra chroma (C) Rate-QP estimate from an intra chroma (C) histogram; offsetting the intra chroma (C) Rate-QP estimate to form an offset intra chroma (C) estimate; and setting a Rate-QP for the input I picture to a sum of: (i) the intra luma (Y) Rate-QP estimate; and (ii) the offset intra chroma (C) Rate-QP estimate.