Figure 14From: Region-of-interest determination and bit-rate conversion for H.264 video transcoding The subjective comparison for the 65th frame of News sequence with bit-rate of 390 Kbps. (a) Pre-encoded frame. The pre-encoded bit-stream with bit-rate 1Mbps (b) ROI map detected by [23] (c) Partial frame of pre-encoded sequence (d) Partial frame of CPDT method. PSNRROI: 35.58dB, SSIMROI: 0.95, and (e) Partial frame of ROI-based transcoder. PSNRROI: 37.78dB, SSIMROI: 0.97.Back to article page