Title :
Bit number prediction for VLC coded DCT coefficients and its application in DV encoding/transcoding
Author :
Lin, Wanrong ; Bushmitch, Dennis ; Wang, Yao ; Safar, Johann
Author_Institution :
Panasonic Inf. & Networking Technol. Lab., Princeton, NJ, USA
Abstract :
We present a simple and efficient scheme to predict the number of bits needed to code a DCT block with variable length code (VLC). Utilizing this new approach, a massive computing effort is averted in the rate-constrained video encoding process. The scheme defines an easily computable parameter that has a strong correlation with the number of bits needed to code the DCT data. A second order polynomial is developed to approximate the correlation and is used to predict the number of VLC bits. This approach is further used to streamline the encoding/transcoding process for DV, and has a potential to be used in other DCT/VLC based coding schemes to facilitate rate control
Keywords :
discrete cosine transforms; quantisation (signal); transform coding; variable length codes; video coding; DV encoding; DV transcoding; SMPTE; Society of Motion Picture and Television Engineers; VLC coded DCT coefficients; bit number prediction; digital video encoding; digital video transcoding; discrete cosine transform; quantization number; rate control; variable length code; Broadcast technology; Discrete cosine transforms; Encoding; Hardware; Intelligent networks; Polynomials; Quantization; TV broadcasting; Transcoding; Transform coding;
Conference_Titel :
Multimedia Signal Processing, 2001 IEEE Fourth Workshop on
Conference_Location :
Cannes
Print_ISBN :
0-7803-7025-2
DOI :
10.1109/MMSP.2001.962724
