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    • 10. 发明申请
    • Apparatus and Method of Embedded Quantization for the Improved Snr Scalbility
    • 嵌入式量化的改进的Snr可扩展性的装置和方法
    • US20080193033A1
    • 2008-08-14
    • US11996099
    • 2006-07-19
    • Hae Chul ChoiJae Gon KimJin Woo HongSung-Jea Ko
    • Hae Chul ChoiJae Gon KimJin Woo HongSung-Jea Ko
    • G06K9/36
    • H04N19/36H04N19/124H04N19/132H04N19/147H04N19/174H04N19/19H04N19/34H04N19/61
    • Provided are a method and apparatus for enhancing coding efficiency by performing encoding and decoding by optimally calculating quantization intervals and reconstruction values through a distribution of DCT coefficients of each frame, when DCT coefficients of each SNR enhancement layer are quantized in scalable video coding. The encoding apparatus includes: an R-D optimization unit performing Rate-Distortion (R-D) optimization based on a distribution of Discrete Cosine Transform (DCT) coefficients each slice and calculating a first reference value and a second reference value respectively indicating a start point and an end point of DCT coefficients quantized to “0”; a quantization interval setting unit setting adaptive quantization intervals on the basis of a minimum value and a maximum value of the DCT coefficients, the first reference value, and the second reference value; and a mapping unit mapping the DCT coefficients to the adaptive quantization intervals.
    • 提供了一种通过在可缩放视频编码中对每个SNR增强层的DCT系数进行量化时,通过每个帧的DCT系数的分布来优化计算量化间隔和重构值来进行编码和解码来提高编码效率的方法和装置。 编码装置包括:RD优化单元,其基于每个切片的离散余弦变换(DCT)系数的分布来执行速率失真(RD)优化,并且计算分别指示开始点和结束的第一参考值和第二参考值 DCT系数的量化为“0”; 量化间隔设定单元,基于DCT系数,第一参考值和第二参考值的最小值和最大值来设置自适应量化间隔; 以及将DCT系数映射到自适应量化间隔的映射单元。