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    Scaled video for pseudo-analog transmission in spatial domain
    1.
    发明授权
    Scaled video for pseudo-analog transmission in spatial domain 有权

    公开(公告)号：US09973780B2

    公开(公告)日：2018-05-15

    申请号：US14069101

    申请日：2013-10-31

    申请人： MICROSOFT TECHNOLOGY LICENSING, LLC

    发明人： Chong Luo ,  Hao Cui ,  Ruiqin Xiong ,  Feng Wu

    IPC分类号： H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/615

    CPC分类号： H04N19/615

    摘要： Scaled video for pseudo-analog transmission in the spatial domain is described. Boundaries are determined for M L-shaped chunks of coefficients of at least one frequency-transformed video frame of a group of pictures (GOP). The boundaries are determined based at least on variances of the coefficients of the M L-shaped chunks, such as by reducing or minimizing the sum of the square roots of the variances of the coefficients. Corresponding power scale factors for the M L-shaped chunks are determined based at least partly on the variances of the coefficients of the M L-shaped chunks, and the coefficients of the M L-shaped chunks are scaled using the corresponding power scale factors. The pixel values of the frames (e.g., the frames in the spatial domain) are transmitted on a pseudo-analog channel. At the receiver, retained spatial redundancy enables denoising in the spatial domain prior to de-scaling in the frequency domain.

    Fast decoding based on ZigZag deconvolution for random projection code
    2.
    发明授权
    Fast decoding based on ZigZag deconvolution for random projection code 有权
    基于ZigZag去卷积的快速解码用于随机投影码

    公开(公告)号：US09432056B2

    公开(公告)日：2016-08-30

    申请号：US14071418

    申请日：2013-11-04

    申请人： Microsoft Technology Licensing, LLC

    发明人： Chong Luo ,  Hao Cui ,  Feng Wu ,  Chang Wen Chen

    IPC分类号： H03K9/00 ,  H04B15/00 ,  H03M13/11 ,  H04L1/00

    CPC分类号： H03M13/1171 ,  H03M13/1111 ,  H04L1/005 ,  H04L1/0058

    摘要： Multi-level symbols generated by applying a Random Projection Code (RPC) to a source bit sequence are received at a receiver via a noisy channel. The received multi-level symbols are represented in a bipartite graph as constraint nodes connected via weighted edges to binary variable nodes that represent the source bit sequence. A decoder uses ZigZag deconvolution to generate constraint node messages as part of an iterative belief propagation to decode the source bit sequence from the received multi-level symbols.

    摘要翻译： 通过将随机投影代码（RPC）应用于源比特序列产生的多级符号通过噪声信道在接收机处被接收。 接收的多级符号在二分图中表示为通过加权边缘连接到表示源比特序列的二进制变量节点的约束节点。 解码器使用ZigZag去卷积来生成约束节点消息作为迭代置信传播的一部分，以从接收到的多级符号解码源比特序列。