학술논문
Adaptive intra-frame quantization for very low bit rate video coding
Document Type
Conference
Source
2004 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and systems Circuits and Systems (ISCAS), 2004 IEEE International Symposium on. 3:III-781 2004
Subject
Language
Abstract
This paper presents, for I-frames, a generic relationship among the quantization value, data bits, and their spatial complexity. This relationship provides a mechanism to select the quantization value for an I-frame (with different spatial complexity) at given bit budget before actually encoding it. Therefore it helps to adaptively distribute the bit budget among I-, P- and B-frames in a sequence. Experiments show that the adaptive intra frame quantization algorithm reduces the number of frame skippings significantly with comparable average PSNRs, and thus improves the overall subjective quality of the reconstructed video.