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    • 5. 发明授权
    • Directional discrete wavelet transform (DDWT) for video compression applications
    • 用于视频压缩应用的定向离散小波变换(DDWT)
    • US08705619B2
    • 2014-04-22
    • US12962645
    • 2010-12-07
    • Thai-Ha NguyenAli Tabatabai
    • Thai-Ha NguyenAli Tabatabai
    • H04N7/30
    • H04N19/593H04N19/42H04N19/63
    • An apparatus and method for encoding video using directional discrete waveform transforms (DDWT), such as within a codec device. DDWT can be utilized to replace the use of intra transforms and inter transforms within the encoding system. In many ways the output of the DDWT can be compared with that provided using MDDT, however, it does not require a training process while it also provides enhanced encoding of feature edges with desirable visual characteristics. The transforms are applied in at least two passes, along the prediction direction, and then across the prediction direction, instead of being applied in fixed vertical and horizontal directions. Directional scaling is not required prior to the second stage of transforms.
    • 一种使用定向离散波形变换(DDWT)编码视频的装置和方法,例如在编解码器装置内。 DDWT可用于替代编码系统内部帧内变换和帧间变换的使用。 在许多方面,可以将DDWT的输出与使用MDDT提供的输出进行比较,但是它不需要训练过程,同时还可以对特征边缘进行增强编码,并具有理想的视觉特征。 沿着预测方向在至少两遍中施加变换,然后跨越预测方向施加变换,而不是施加在固定的垂直和水平方向上。 在第二阶段的转换之前不需要定向缩放。
    • 7. 发明授权
    • Run length coding with context model for image compression using sparse dictionaries
    • 使用稀疏词典进行图像压缩的上下文模型的运行长度编码
    • US08483500B2
    • 2013-07-09
    • US12962638
    • 2010-12-07
    • Thai-Ha NguyenAli Tabatabai
    • Thai-Ha NguyenAli Tabatabai
    • G06K9/36G06K9/46
    • H03M7/46H03M7/3082H03M7/4018H04N19/91
    • Apparatus and methods for coding images geometric vector quantization (GVQ) having an over-complete dictionary which produces a sparse vector of coefficients as it contains large runs of zeros. The sparse encoding is particularly well suited for use with run-length entropy coding techniques. Image blocks are sparse coded using GVQ, with the vector of coefficients converted to RUN-LENGTH symbols, and binarized into a set of binary symbols. At least a portion of the binary symbols are used as contexts which can be selected when performing binary arithmetic coding of the binary coded RUN and LENGTH data to generate a bit stream containing the encoded image that provides enhanced compression.
    • 用于编码具有过完整字典的图像几何矢量量化(GVQ)的装置和方法,其在包含大量零的零时产生系数的稀疏矢量。 稀疏编码特别适用于游程长度熵编码技术。 使用GVQ对图像块进行稀疏编码,将系数矢量转换为RUN-LENGTH符号,并将其二值化为一组二进制符号。 二进制符号的至少一部分被用作当对二进制编码的RUN和LENGTH数据执行二进制算术编码时可以选择的上下文,以生成包含提供增强压缩的编码图像的比特流。
    • 9. 发明授权
    • Extension to the AVC standard to support the encoding and storage of high resolution digital still pictures in series with video
    • 扩展到AVC标准,以支持与视频串行编码和存储高分辨率数字静态图片
    • US08170097B2
    • 2012-05-01
    • US11999377
    • 2007-12-04
    • Ali TabatabaiMohammed Zubair Visharam
    • Ali TabatabaiMohammed Zubair Visharam
    • H04N7/12
    • H04N19/59H04N19/33H04N19/46H04N19/61H04N19/70
    • A codec configured to operate in a sequential mode extends the current AVC standard in order to provide support for coding high resolution still image pictures within the AVC coding of a lower resolution video. The sequential mode codec is configured according to the modified AVC standard. The codec is capable of capturing an AVC video stream while concurrently capturing high resolution still images at random intervals relative to the video stream. Each captured high resolution still image is embedded within the video stream. The video stream including the embedded high resolution still images is encoded as a single layer bit stream. Each embedded high resolution still image signals or forces the start of a new GOP in the coded video sequence. The AVC standard is extended to include new syntax for the sequence parameter sets. In one embodiment, a modified sequence parameter set defines a new profile that signals the presence of a high resolution still image in sequence with AVC video.
    • 配置为以顺序模式操作的编解码器扩展了当前AVC标准,以便为较低分辨率视频的AVC编码中的高分辨率静止图像图像编码提供支持。 顺序模式编解码器根据修改的AVC标准进行配置。 编解码器能够捕获AVC视频流,同时以相对于视频流的随机间隔捕获高分辨率静止图像。 每个捕获的高分辨率静止图像嵌入在视频流内。 包括嵌入式高分辨率静止图像的视频流被编码为单层比特流。 每个嵌入的高分辨率静止图像在编码视频序列中发出信号或强制新GOP的开始。 AVC标准被扩展为包括序列参数集的新语法。 在一个实施例中,修改的序列参数集定义了新的简档,其根据AVC视频依次表示高分辨率静止图像的存在。