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    • 8. 发明授权
    • Method for encoding a digital signal into a scalable bitstream; method for decoding a scalable bitstream
    • 用于将数字信号编码为可缩放比特流的方法; 解码可变比特流的方法
    • US08446947B2
    • 2013-05-21
    • US10575409
    • 2004-10-06
    • Rongshan YuXiao LinSusanto Rahardja
    • Rongshan YuXiao LinSusanto Rahardja
    • H04N7/12H04N11/02H04N11/04H03M7/00G10H7/04G10L19/00
    • G10L19/24H04N19/126H04N19/184H04N19/187H04N19/34H04N19/647
    • A method for encoding a digital signal into a scalable bitstream comprising quantizing the digital signal, and encoding the quantized signal to form a core-layer bitstream, performing an error mapping based on the digital signal and the core-layer bitstream to remove information that has been encoded into the core-layer bitstream, resulting in an error signal, bit-plane coding the error signal based on perceptual information of the digital signal, resulting in an enhancement-layer bitstream, wherein the perceptual information of the digital signal is determined using a perceptual model, and multiplexing the core-layer bitstream and the enhancement-layer bitstream, thereby generating the scalable bitstream. A method for decoding a scalable bitstream into a digital signal comprising de-multiplexing the scalable bitstream into a core-layer bitstream and an enhancement-layer bitstream, decoding and de-quantizing the core-layer bitstream to generate a core-layer signal, bit-plane decoding the enhancement-layer bitstream based on perceptual information of the digital signal, and performing an error mapping based on the bit-plane decoded enhancement-layer bitstream and the de-quantized core-layer signal, resulting in an reconstructed transformed signal, wherein the reconstructed transformed signal is the digital signal.
    • 一种用于将数字信号编码成可分级比特流的方法,包括量化数字信号,以及对量化信号进行编码以形成核心层比特流,基于数字信号和核心层比特流执行误差映射,以去除具有 被编码到核心层比特流中,导致误差信号,基于数字信号的感知信息对误差信号进行位平面编码,产生增强层比特流,其中数字信号的感知信息使用 感知模型,以及多路复用核心层比特流和增强层比特流,由此生成可分级比特流。 一种用于将可分级比特流解码为数字信号的方法,包括将可分级比特流解复用为核心层比特流和增强层比特流,解码和解量化核心层比特流以产生核心层信号 基于数字信号的感知信息对增强层比特流进行平面解码,并且基于比特平面解码的增强层比特流和去量化的核心层信号执行错误映射,导致重构的变换信号, 其中重建的变换信号是数字信号。
    • 9. 发明授权
    • Context-based encoding and decoding of signals
    • 基于上下文的信号编码和解码
    • US07656319B2
    • 2010-02-02
    • US11632486
    • 2004-07-14
    • Rongshan YuXiao LinSusanto Rahardja
    • Rongshan YuXiao LinSusanto Rahardja
    • H03M5/00
    • G10L19/0212G10L19/0017H04N19/13H04N19/136H04N19/176H04N19/184H04N19/34H04N19/647
    • A system for the context-based for the context-based encoding of an input signal includes a domain transform module and a context-based coding module. The domain transform module is operable to convert the input signal into a sequence of transform coefficients c[i]. The context-based coding module includes a bit-plane scanning module, and context modeling module, and a statistical encoding module. The bit-plane scanning module is operable to produce a bit-plane symbol bps [i,bp] for each transform coefficient c[i] and each bit-plane [bp]. The context modeling module is operable to assign one or more context values to each of the received bit plane symbols bps [i,bp]. The statistical coding module is operable to code each of the bit plane symbols bps [i,bp] as a function of one or more of the corresponding context values to produce a context-based encoded symbol stream.
    • 用于输入信号的基于上下文的编码的基于上下文的系统包括域变换模块和基于上下文的编码模块。 域变换模块可操作以将输入信号转换成变换系数c [i]的序列。 基于上下文的编码模块包括位平面扫描模块和上下文建模模块以及统计编码模块。 位平面扫描模块可用于为每个变换系数c [i]和每个位平面[bp]产生位平面符号bps [i,bp]。 上下文建模模块可操作以将一个或多个上下文值分配给每个接收到的位平面符号bps [i,bp]。 统计编码模块可操作以根据一个或多个对应的上下文值对每个比特平面符号bps [i,bp]进行编码,以产生基于上下文的编码符号流。