Title :
Perceptully lossless video re-encoding for cloud transcoding
Author :
Chieh-Kai Kao ; Tsung-Yau Huang ; Chen, He Henry ; Ja-Ling Wu
Author_Institution :
Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, we present a perceptually lossless video re-encoding approach to cloud transcoding based on a just noticeable distortion (JND) model. The bitrate is minimized by adaptive step size and dynamic rounding offset adjustment. On the average, the proposed approach achieves 9.7% overall bitrate reduction compared to the H.264/AVC JM reference encoder under the same coding condition. The performance of the resulting cloud transcoding is further verified by a subjective test.
Keywords :
distortion; transcoding; video coding; H.264/AVC JM reference encoder; JND model; adaptive step size; bitrate reduction; cloud transcoding; coding condition; dynamic rounding offset adjustment; just noticeable distortion model; lossless video reencoding approach; Abstracts; Bit rate; Image edge detection; Quantization (signal); Transcoding; Transforms; JND model; human visual system; perceptual video coding; quantization; transcoding;
Conference_Titel :
Signal and Information Processing (ChinaSIP), 2014 IEEE China Summit & International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4799-5401-8
DOI :
10.1109/ChinaSIP.2014.6889252
