Pre-processing device for MPEG 2 coding
    1.
    发明授权
    Pre-processing device for MPEG 2 coding 失效
    用于MPEG 2编码的预处理设备

    公开(公告)号:US06229925B1

    公开(公告)日:2001-05-08

    申请号:US09081447

    申请日:1998-05-19

    IPC分类号: G06K936

    摘要: The invention relates to a device for pre-processing video images intended to be coded in the MPEG 2 format. The MPEG 2 standard provides that, mode which exploits the spatial redundancy of the images. The images thus coded then define a succession of groups of images, a group of images being referred to as a GOP. The pre-processing device according to the invention comprises an image memory and an analysis circuit. The image memory makes it possible to store the various images contained in the forecast GOP of rank ok and ax of the first few images contained in the GOP of rank ok+l, ax being an integer greater than or equal to 1. The analysis circuit is linked to the image memory and makes it possible to perform measurements on the images contained therein. The knowledge about the images of the GOP of rank and about the first images of the forecast GOP of rank k+1 which is ascertained following the above mentioned measurements is then used for coding the GOP of rank k. The invention applies to systems for coding images according to the MPEG 2 standard.

    摘要翻译: 本发明涉及一种用于预处理以MPEG2格式编码的视频图像的装置。 MPEG 2标准提供了利用图像的空间冗余的模式。 因此,如此编码的图像定义了一组连续的图像,一组图像被称为GOP。根据本发明的预处理装置包括图像存储器和分析电路。图像存储器使得可以存储 包含在秩ok的预测GOP中的各种图像和包含在等级ok + l的GOP中的前几个图像的ax,ax是大于或等于1的整数。分析电路链接到图像存储器 可以对其中包含的图像执行测量。 关于GOP的等级图像和关于按照上述测量确定的秩k + 1的预测GOP的第一图像的知识然后被用于对等级k的GOP进行编码。本发明适用于编码的系统 图像根据MPEG 2标准。

    Variable bit-rate encoder
    2.
    发明授权
    Variable bit-rate encoder 有权
    可变比特率编码器

    公开(公告)号:US06212233B1

    公开(公告)日:2001-04-03

    申请号:US09180255

    申请日:1998-11-06

    IPC分类号: H04N712

    摘要: The invention relates to a process for coding digital data of a video sequence for its transmission and a variable bit rate. It is characterized in that the bit rate regulation in respect of the image at the instant n is performed as a function of a bit rate prediction in respect of the transmission channel for the instant n+&tgr;, &tgr; being a constant time between the instant of storage of an image in the buffer of the coder and the instant of output of this image from the buffer of the decoder.

    摘要翻译: 本发明涉及用于对其发送的视频序列的数字数据进行编码和可变比特率的过程。其特征在于,根据比特率来执行相对于时刻n的图像的比特率调整 关于即时n +&tgr,&tgr的传输信道的预测 是在编码器的缓冲器中存储图像的时刻与从解码器的缓冲器输出该图像的时刻之间的恒定时间。

    Valve lock
    4.
    发明授权
    Valve lock 失效
    阀门锁

    公开(公告)号:US5165263A

    公开(公告)日:1992-11-24

    申请号:US822216

    申请日:1992-01-17

    IPC分类号: F16K35/06

    摘要: The locking device locks the valve control lever in both its closed or open positions. It consists of a male part and a female part. The male part includes a lengthwise cavity, for flatly and freely receiving the valve lever, and a U-shape extension, transversely extending from one end of the male part main body. The female part defines a channel for sliding engagement by the interconnected male part and valve lever, to interlock same. A padlock interlocks the male and female parts by engaging registering ears thereof.

    摘要翻译: 锁定装置将阀控制杆锁定在其关闭位置或打开位置。 它由男性部分和女性部分组成。 阳部包括用于平坦且自由地接收阀杆的纵向腔,以及从阳部件主体的一端横向延伸的U形延伸部。 阴部分限定了用于通过互连的阳部件和阀杆滑动接合的通道,以使其互锁。 挂锁通过接合其登记耳来互锁男性和女性部分。

    Variable length encoding method and variable length decoding method,
encoding device and decoridng device for the implementation of this
method
    5.
    发明授权
    Variable length encoding method and variable length decoding method, encoding device and decoridng device for the implementation of this method 失效
    可变长度编码方法和可变长度解码方法,编码装置和装饰装置用于实现这种方法

    公开(公告)号:US5021782A

    公开(公告)日:1991-06-04

    申请号:US432763

    申请日:1989-11-30

    IPC分类号: H03M7/40

    CPC分类号: H03M7/40

    摘要: A variable length encoding method for encoding a finite or infinite series of values corresponding to a random variable whose distribution monotonically decreases on either side of the mean value in which the encoding tree has a regular structure which is defined by an arithmetic and logic device. In order to encode each value E, a first binary word, including only bits having a same value and whose number of bits B is an increasing function of the value to the encoded E, is determined. The number of bits B is computed according to a predetermined arithmetic and logic function B(E). The method also involves determining a second binary word having a value to be encoded, in the set of values to be encoded arranged in order of decreasing probability, and whose number of bits B' is derived from the function B(E) and from the number of bits B in the first binary word. A code word is formed by combining the first and second binary words thus determined.

    摘要翻译: PCT No.PCT / ER89 / 00061 Sec。 371日期:一九八九年十一月三十日 102(e)日期1989年11月30日PCT提交1989年2月17日PCT公布。 公开号WO89 / 07863 日期1989年8月24日。一种可变长度编码方法,用于编码对应于随机变量的有限或无限序列值,该随机变量在其平均值的任一侧单调减少,其中编码树具有规则结构,其规则结构由 算术和逻辑器件。 为了对每个值E进行编码,确定仅包括具有相同值并且位数B为对于编码的E的值的增加函数的位的第一二进制字。 根据预定的算术和逻辑函数B(E)计算比特数B。 该方法还涉及确定具有要被编码的值的第二二进制字,在要被编码的值的集合中按照概率降低的顺序排列,并且其位数B'是从函数B(E)和 第一个二进制字中的位数B。 通过组合如此确定的第一和第二二进制字来形成码字。

    Synchronization device for a sequence of variable length rasters
    7.
    发明授权
    Synchronization device for a sequence of variable length rasters 失效
    用于可变长度RASTERS序列的同步装置

    公开(公告)号:US5140619A

    公开(公告)日:1992-08-18

    申请号:US555509

    申请日:1990-08-07

    IPC分类号: H04L7/04

    CPC分类号: H04L7/042

    摘要: Synchronization for a device receiving an input sequence of variable length rasters even in the presence of transmission errors. Each variable length raster is preceded by an N times identically repeated prefix, this prefix is composed of a fixed binary pattern separator and a parameter word describing the variable length raster to follow. Upon identifying a fixed binary pattern separator, even in the presence of transmission errors, the synchronization device outputs asynchronization signal signaling that a parameter word is to follow. The parameter word input is then subjected to transmission error elimination and output to the receiving device. Thus the receiving device is able to properly input the incoming variable length raster based on a accurate parameter word.

    摘要翻译: PCT No.PCT / FR89 / 00635 Sec。 371日期1990年8月7日第 102(e)日期1990年8月7日PCT提交1989年12月3日PCT公布。 公开号WO90 / 06643 日期1990年6月14日。即使存在传输错误,接收可变长度栅格的输入序列的设备的同步。 每个可变长度的栅格前面都有N倍相同的前缀,该前缀由固定的二进制模式分隔符和描述可变长度栅格的参数字组成。 在识别固定的二进制模式分离器时,即使存在传输错误,同步装置输出参数字要跟随的异步信号。 然后对参数字输入进行传输错误消除并输出到接收设备。 因此,接收设备能够基于准确的参数字来适当地输入输入的可变长度光栅。

    Method of encoding and decoding data in blocks, and encoding and
decoding devices implementing this method
    9.
    发明授权
    Method of encoding and decoding data in blocks, and encoding and decoding devices implementing this method 失效
    在块中编码和解码数据的方法,以及实现该方法的编码和解码设备

    公开(公告)号:US5140621A

    公开(公告)日:1992-08-18

    申请号:US457767

    申请日:1990-02-09

    IPC分类号: H04N7/26 H04N7/30

    CPC分类号: H04N19/60 H04N19/13 H04N19/91

    摘要: The present invention relates to a method and apparatus of encoding and decoding blocks of data words. Each block has a fixed number of data words with a maximum of nbits, and a position of a data word within a block is diagonally identified by a series of absolute addresses having consecutive values. In the encoding of the data words of a block, the data words are classified into groups based on their most significant non-zero bit. Then the corresponding absolute address of each classified data word is encoded based on the absolute address of a previously encoded data word in the same class as the current classified data word and the number of data words encoded in classes less than the current classified data word since the previous encoding of a data word in the class of the current classified data word. Each data word with its ith and greater bits omitted is then transmitted along with the encoded absolute address. The encoded data words are decoded by determining the class of each encoded data word and storing, class by class, the encoded data words and their corresponding encoded addresses. The ith and greater bits of each encoded data words are reconstituted, and the encoded absolute addresses of each data word are then reconstituted into absolute addresses to reconstitute a block of data words.

    摘要翻译: PCT No.PCT / FR89 / 00169 Sec。 371日期1990年2月9日 102(e)1990年2月9日PCT PCT 1989年4月14日提交PCT公布。 出版物WO89 / 10042 1989年10月19日的日期。数据字块的编码和解码方法和装置。 每个块具有固定数量的具有最大nbits的数据字,并且块内的数据字的位置由具有连续值的一系列绝对地址对角地标识。 在块的数据字的编码中,数据字根据其最重要的非零位被分类成组。 然后,基于与当前分类数据字相同类别的先前编码的数据字的绝对地址和小于当前分类数据字的类中编码的数据字的数量来编码每个分类数据字的对应绝对地址,因为 对当前分类数据字的类中的数据字的先前编码。 每个省略其第i个和更多位的数据字随后与编码的绝对地址一起传输。 通过确定每个编码数据字的类别并按类别分类编码的数据字及其对应的编码地址来对编码的数据字进行解码。 重构每个编码数据字的第i个和更大的位,然后将每个数据字的经编码的绝对地址重构为绝对地址以重构数据字块。

    Synchronization method for the transmission, of an asynchronous channel,
or a series of pictures encoded by means of a variable length code, and
device for the implementation of this method
    10.
    发明授权
    Synchronization method for the transmission, of an asynchronous channel, or a series of pictures encoded by means of a variable length code, and device for the implementation of this method 失效
    用于传输,异步信道或通过可变长度码编码的一系列图像的同步方法,以及用于实现该方法的装置

    公开(公告)号:US5036391A

    公开(公告)日:1991-07-30

    申请号:US408510

    申请日:1989-08-25

    摘要: The synchronization method, consists in transmitting, in addition to the data:inter-block separators, for separating the data corresponding to separate blocks, each inter-block separator comprising: a fixed radical, a first binary word representing the rank of a block of picture elements associated with this separator, and a second binary word representing the sum of this rank and of the number of events which are encoded by the data corresponding to the block associated with this separator;picture separators, for separating the data corresponding to successive pictures, each picture separator being repeated several times and comprising a fixed radical followed by a binary word indicating the rank of the separator in the repetitions;synchronization patterns at the picture line frequency and synchronization patterns at the picture frequency, transmitted while interrupting the transmission of the data and of the separators.application to the transmission of digital video pictures on an asynchronous channel.

    摘要翻译: PCT No.PCT / FR88 / 00650 Sec。 371日期1989年8月25日第 102(e)日期1989年8月25日PCT提交1988年12月30日PCT公布。 出版物WO89 / 06471 日期:1989年7月13日。同步方法包括:除了用于分离对应于分开的块的数据的数据之外的每个块间分离器还包括:固定根,第一二进制字 表示与该分离器相关联的图像元素的等级,以及表示由与该分离器相关联的块对应的数据编码的该等级和事件数的总和的第二二进制字; 图像分离器,用于分离对应于连续图像的数据,每个图像分离器被重复多次,并且包括固定基,随后是表示重复中的分离器的等级的二进制字; 图像频率上的同步模式和图像频率的同步模式,同时中断数据和分离器的传输。 应用于在异步通道上传输数字视频图像。