Transcoder for scalable multi-layer constant quality video bitstreams
    71.
    发明授权
    Transcoder for scalable multi-layer constant quality video bitstreams 失效
    用于可扩展多层恒定质量视频比特流的转码器

    公开(公告)号:US06925120B2

    公开(公告)日:2005-08-02

    申请号:US09961987

    申请日:2001-09-24

    摘要: A method codes an output bitstream of an input video so the decoded output bitstream has a constant perceived quality. A base layer bitstream having a constant bit-rate is generated from the input video, and an input enhancement layer bitstream is generated from a difference between the input video and the base layer bitstream. Rate and distortion characteristics are extracted from the base layer bitstream and the input enhancement layer bitstream, and an output enhancement layer bitstream having a variable bit-rate is generated from the input enhancement layer bitstream according to the rate and distortion characteristics. The base layer bitstream and the output enhancement layer bitstream, in combination, form an output bitstream having a variable bit-rate and a constant distortion.

    摘要翻译: 一种方法对输入视频的输出比特流进行编码,使得解码的输出比特流具有恒定的感知质量。 从输入视频产生具有恒定比特率的基本层比特流,并且从输入视频和基本层比特流之间的差异生成输入增强层比特流。 从基本层比特流和输入增强层比特流中提取速率和失真特性,并且根据速率和失真特性从输入增强层比特流生成具有可变比特率的输出增强层比特流。 基本层比特流和输出增强层比特流组合形成具有可变比特率和恒定失真的输出比特流。

    Resource-constrained sampling of multiple compressed videos
    72.
    发明申请
    Resource-constrained sampling of multiple compressed videos 失效
    资源受限的多个压缩视频采样

    公开(公告)号:US20050036547A1

    公开(公告)日:2005-02-17

    申请号:US10659904

    申请日:2003-09-11

    IPC分类号: H04N7/26 H04N7/12 H04N7/24

    摘要: A method acquires compressed videos. Intra-, or inter-frames of each compressed video are acquired at a fixed sampling rate. Joint analysis is applied concurrently and in parallel to the compressed videos to determine a variable and non-uniform temporal sampling rate for each compressed video so that a combined distortion is minimized and a combined frame rate constraint is satisfied. Each compressed video is then sampled at the associated variable and non-uniform temporal sampling rate to produce output compressed videos having variable temporal resolutions.

    摘要翻译: 一种方法获取压缩视频。 以固定的采样率获取每个压缩视频的帧内或帧间。 联合分析同时并行地应用于压缩视频,以确定每个压缩视频的可变和不均匀的时间采样率,使得组合失真被最小化并且组合的帧速率约束被满足。 然后以相关联的变量和非均匀时间采样率对每个压缩视频进行采样,以产生具有可变时间分辨率的输出压缩视频。

    Video transcoder with spatial resolution reduction
    73.
    发明授权
    Video transcoder with spatial resolution reduction 有权
    具有空间分辨率降低的视频转码器

    公开(公告)号:US06671322B2

    公开(公告)日:2003-12-30

    申请号:US09853394

    申请日:2001-05-11

    IPC分类号: H04N712

    摘要: A method transcodes groups of macroblocks of a partially decoded input bitstream. The groups of macroblocks include intra-mode and inter-mode macroblocks. Each macroblock includes DCT coefficients, and at least one motion vector. The modes of each group of macroblocks are mapped to be identical only if there is an inter-mode block and an intra-mode macroblock in the group. If any of the macroblocks in the group are mapped, then the DCT coefficients and the motion vector for such mapped macroblocks are modified in accordance with the mapping to generate reduced-resolution macroblock for an output compressed bitstream to compensate for drift.

    摘要翻译: 一种方法对部分解码的输入比特流的宏块组进行转码。 宏块组包括帧内模式和模式间宏块。 每个宏块包括DCT系数和至少一个运动矢量。 每组宏块的模式只有在组中有模式间模块和模式内宏块时才被映射为相同模式。 如果组中的任何宏块被映射,则根据映射来修改这些映射宏块的DCT系数和运动矢量,以生成用于输出压缩比特流的减小分辨率的宏块以补偿漂移。

    Method for ordering image spaces to represent object shapes
    74.
    发明授权
    Method for ordering image spaces to represent object shapes 失效
    用于排序图像空间来表示对象形状的方法

    公开(公告)号:US06307964B1

    公开(公告)日:2001-10-23

    申请号:US09326759

    申请日:1999-06-04

    IPC分类号: G06K900

    CPC分类号: G06T9/001 G06T9/20

    摘要: A method represents a shape of an object in an image. Portions of the image interior to a boundary of the object are ordered. A medial axis for the ordered portions of the image is derived. The medial axis is segmented to produce an ordered tree. The ordered tree is transformed to a partial ordered tree to represent the shape of the object.

    摘要翻译: 方法表示图像中的对象的形状。 将图像内部部分到对象的边界进行排序。 导出图像的有序部分的中间轴。 内侧轴被分割以产生有序树。 有序树被转换为部分有序树以表示对象的形状。

    Synthetic Reference Picture Generation
    76.
    发明申请
    Synthetic Reference Picture Generation 审中-公开
    合成参考图片生成

    公开(公告)号:US20130287289A1

    公开(公告)日:2013-10-31

    申请号:US13455904

    申请日:2012-04-25

    IPC分类号: G06K9/36 G06K9/00

    摘要: A synthetic image block in a synthetic picture is generated for a viewpoint based on a texture image and a depth image. A subset of samples from the texture image are warped to the synthetic image block. Disoccluded samples are marked, and the disoccluded samples in the synthetic image block are filled based on samples in a constrained area. The method and system enables both picture level and block level processing for synthetic reference picture generation. The method can be used for power limited devices, and can also refine the synthetic reference picture quality at a block level to achieve coding gains.

    摘要翻译: 基于纹理图像和深度图像为视点生成合成图像中的合成图像块。 来自纹理图像的样本的子集变形到合成图像块。 标记脱离的样品,并且基于约束区域中的样品填充合成图像块中的分离样品。 该方法和系统能够进行合成参考图像生成的图像级和块级处理。 该方法可用于功率受限设备,并且还可以在块级别细化合成参考图像质量以实现编码增益。

    Pre-processing biometric parameters before encoding and decoding
    77.
    发明授权
    Pre-processing biometric parameters before encoding and decoding 有权
    在编码和解码之前预处理生物特征参数

    公开(公告)号:US08375218B2

    公开(公告)日:2013-02-12

    申请号:US11928687

    申请日:2007-10-30

    IPC分类号: G06F21/00

    摘要: Biometric parameters acquired from human faces, voices, fingerprints, and irises are used for user authentication and access control. Because the biometric parameters are continuous and vary from one reading to the next, syndrome codes are applied to determine biometric syndrome vectors. The biometric syndrome vectors can be stored securely, while tolerating an inherent variability of biometric data. The stored biometric syndrome vector is decoded during user authentication using biometric parameters acquired at that time. The syndrome codes can also be used to encrypt and decrypt data. The biometric parameters can be pre-processed to form a binary representation, in which the binary representation has a set of predetermined statistical properties enforced imposed by a set of binary logical conditions.

    摘要翻译: 从人脸,语音,指纹和虹膜获取的生物特征参数用于用户认证和访问控制。 因为生物特征参数是连续的,并且从一个读数到下一个读数不同,所以应用校正子码来确定生物统计学综合征矢量。 可以安全地存储生物特征综合征矢量,同时容忍生物特征数据的固有变异性。 存储的生物统计量子载体在用户认证期间使用当时获取的生物特征参数进行解码。 校正码也可用于加密和解密数据。 生物特征参数可以被预处理以形成二进制表示,其中二进制表示具有由一组二进制逻辑条件强加的一组预定的统计特性。

    Video Codes with Directional Transforms
    80.
    发明申请
    Video Codes with Directional Transforms 审中-公开
    具有定向变换的视频码

    公开(公告)号:US20110090954A1

    公开(公告)日:2011-04-21

    申请号:US12603177

    申请日:2009-10-21

    IPC分类号: H04N7/24

    摘要: An encoded video in the form of a bitstream includes a sequence of frames, and each frame is partitioned into encoded blocks. A context for decoding is selected for each encoded block. The bitstream is entropy decoded based on the context to obtain a transform indicator difference. The transform index, which indicates a transform type and a transform direction, is based on the transform indicator difference and a predicted transform indicator. Transform coefficients are obtained from the bitstream, and inverse transformed according to the transform index to produce a decoded video.

    摘要翻译: 以比特流形式的编码视频包括一系列帧,每帧被划分成编码块。 为每个编码块选择用于解码的上下文。 基于上下文对比特流进行熵解码以获得变换指示符差异。 指示变换类型和变换方向的变换索引基于变换指标差和预测变换指标。 从比特流获得变换系数,并根据变换索引进行逆变换以产生解码视频。