Bit-rate control in a multimedia device
    1.
    发明授权
    Bit-rate control in a multimedia device 有权
    多媒体设备中的比特率控制

    公开(公告)号:US06704281B1

    公开(公告)日:2004-03-09

    申请号:US09483143

    申请日:2000-01-13

    IPC分类号: H04L1226

    摘要: A multimedia terminal comprising: a first encoder (100) for producing a first bit-stream (107) of a first media type and having a first bit-rate; a second encoder (110) for producing a second bit-stream (112) of a second media type and having a second bit-rate; a multiplexer (120) for combining at least the first (106) and the second (112) bit-streams into a third bit-stream (123). The terminal comprises an input element (130) for receiving preference information (131) coupled to the first encoder (100) and the second encoder (110), said preference information (131) indicating a preferred combination of the first and the second media types in the third bit-stream and affecting the first and the second bit-rates. Thus, the transmission capacity is utilised in a more optimised manner and the proportions of different media types are better adjusted to the purpose of the information transfer.

    摘要翻译: 一种多媒体终端,包括:第一编码器(100),用于产生具有第一比特率的第一媒体类型的第一比特流(107) 用于产生具有第二比特率的第二媒体类型的第二比特流(112)的第二编码器(110) 用于将至少第一(106)和第二(112)比特流合并成第三比特流(123)的多路复用器(120)。 终端包括用于接收耦合到第一编码器(100)和第二编码器(110)的偏好信息(131)的输入元件(130),所述偏好信息(131)指示第一和第二媒体类型的优选组合 在第三个比特流中并影响第一个和第二个比特率。 因此,以更优化的方式利用传输容量,并且将不同媒体类型的比例更好地调整到信息传送的目的。

    Error detection in low bit-rate video transmission
    2.
    发明授权
    Error detection in low bit-rate video transmission 有权
    低比特率视频传输中的错误检测

    公开(公告)号:US07408991B2

    公开(公告)日:2008-08-05

    申请号:US10695722

    申请日:2003-10-28

    申请人: Ari Hourunranta

    发明人: Ari Hourunranta

    IPC分类号: H04B1/66

    摘要: A method for decoding video data blocks using variable length codes, comprising transforming information about the spatial frequency distribution of a video data block into pixel values. Prior to said transformation, a first reference value (Xref) representing the abruptness of variations in information about spatial frequency distribution within the block is generated, after said transformation, a second reference value (Δ) representing the abruptness of variation in certain information between the block and at least one previously transformed video data block is generated. The first reference value (Xref) is compared to a first threshold value (TH1) and the second reference value (Δ) to a second threshold value (TH2); and as a response to either of the first (Xref) and second reference values (Δ) being greater than the first (TH1) and respectively the second threshold value (TH2), an error in the block is detected.

    摘要翻译: 一种使用可变长度码解码视频数据块的方法,包括将关于视频数据块的空间频率分布的信息变换为像素值。 在所述变换之前,在所述变换之后生成表示关于所述块内的空间频率分布的信息变化的突变的第一参考值(Xref),表示所述变换之间的某些信息的变化的突变性的第二参考值(Delta) 块和至少一个先前变换的视频数据块。 将第一参考值(Xref)与第一阈值(TH 1)和第二参考值(Delta)比较为第二阈值(TH 2); 并且作为对第一(Xref)和第二参考值(Delta)中的任何一个大于第一(TH 1)和分别第二阈值(TH 2)的响应,检测到块中的错误。

    Error detection in receiving multiplex signals
    3.
    发明授权
    Error detection in receiving multiplex signals 有权
    接收多路复用信号时的错误检测

    公开(公告)号:US06959020B1

    公开(公告)日:2005-10-25

    申请号:US09337916

    申请日:1999-06-22

    IPC分类号: H04J3/00 H04N19/89 H04J3/02

    CPC分类号: H04N19/89

    摘要: A method in reception of a multiplex signal, comprising one or more data units, and at least one framing data block in each multiplex signal. The method comprises: searching for said framing data block from a received multiplex signal; demultiplexing said one or more data units according to the information in said framing data block; generating one or more demultiplexed signals from said demultiplexed data units, and forwarding said demultiplexed signals for decoding (50). At multiplexing possible invalidity of demultiplexed video data units is detected (51), and as a response to a detected invalidity in a demultiplexed video data unit, an error indication to the demultiplexed video data signal is added (52).

    摘要翻译: 一种接收多路复用信号的方法,包括一个或多个数据单元,以及每个复用信号中的至少一个成帧数据块。 该方法包括:从接收到的多路复用信号中搜索所述成帧数据块; 根据所述成帧数据块中的信息对所述一个或多个数据单元进行解复用; 从所述解复用数据单元生成一个或多个解复用信号,以及转发所述解复用的信号进行解码(50)。 在多路分解视频数据单元的多路复用可能无效的情况下(51),并且作为对已解复用的视频数据单元中检测到的无效的响应,添加了解复用的视频数据信号的错误指示(52)。

    Method for detecting errors in video information
    4.
    发明授权
    Method for detecting errors in video information 失效
    检测视频信息错误的方法

    公开(公告)号:US06983016B2

    公开(公告)日:2006-01-03

    申请号:US09849803

    申请日:2001-05-04

    申请人: Ari Hourunranta

    发明人: Ari Hourunranta

    IPC分类号: H04N7/12

    CPC分类号: H04N19/89

    摘要: A method for detecting errors in an image signal. The image signal is produced by dividing an image into image blocks, and coding is performed in which at least predictive coding is performed on an image block to produce inter-coded image information for the image block. The inter-coded image information comprises at least one prediction error block containing prediction error information. A decoding is performed to recover prediction error information contained in the at least one prediction error information contained in the at least one prediction error block. A prediction error block check is performed in which prediction error information contained in the at least one prediction error block is examined to detect errors in the inter-coded image information for the image block.

    摘要翻译: 一种用于检测图像信号中的错误的方法。 图像信号通过将图像划分成图像块而产生,并且对图像块执行至少对至少预测编码的编码,以产生用于图像块的帧间编码图像信息。 帧间编码图像信息包括至少一个包含预测误差信息的预测误差块。 执行解码以恢复包含在包含在至少一个预测误差块中的至少一个预测误差信息中的预测误差信息。 执行预测误差块检查,其中检查包含在至少一个预测误差块中的预测误差信息,以检测用于图像块的帧间编码图像信息中的错误。

    Video coding
    5.
    发明授权
    Video coding 有权
    视频编码

    公开(公告)号:US06611561B1

    公开(公告)日:2003-08-26

    申请号:US09506277

    申请日:2000-02-17

    IPC分类号: H04N712

    摘要: A methodic and apparatus for video decoding including receiving encoded video data; decoding the video data to form decoded video data and determining if the decoded the video data contains an error. When it is determined that an error is present, a message is sent to a transmitting video encoder requesting an update of at least the portion of the video data containing the error, wherein the update message is only sent if a pre-determined period has elapsed since a previous update message was sent. A complementary encoder is also described.

    摘要翻译: 一种用于视频解码的方法和装置,包括接收编码视频数据; 对视频数据进行解码以形成解码视频数据,并确定解码的视频数据是否包含错误。 当确定存在错误时,将消息发送到发送视频编码器,请求更新包含错误的视频数据的至少一部分,其中仅在经过了预定时间段时才发送更新消息 由于以前的更新消息已发送。 还描述了互补编码器。