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    • 1. 发明申请
    • DIGITAL SIGNAL DIVIDED INTO SELF-CONTAINED DATA CONTAINERS, IN PARTICULAR FOR DATA TRANSMISSION TO SELECTIVE CALL RECEIVERS
    • 数字信号分为自包含数据容器,特别是数据传输到选择性呼叫接收器
    • WO1995028810A1
    • 1995-10-26
    • PCT/FR1995000504
    • 1995-04-18
    • FRANCE TELECOMTELEDIFFUSION DE FRANCERAHUEL, Jean-ClaudeBACHE, AlainGUILLOUET, Edouard
    • FRANCE TELECOMTELEDIFFUSION DE FRANCE
    • H04Q07/10
    • H04H20/28H04H20/72H04H20/86H04H2201/70H04W88/187
    • A digital signal to be received by a plurality of receivers, particularly restricted-range receivers, and divided into signal frames of which at least some include both a main data channel consisting of sub-channels, and a data transport path including at least one data channel consisting of separate data blocks dedicated to a single service and known as containers. Each container includes a header (41) consisting of a selection sub-header (44) containing, inter alia, data (46) for identifying a group of at least one container destination receiver, and a service sub-header (45) containing, inter alia, dedicated service data; a separately convolutionally coded working data field (42) containing source data for a given service; and an error detection and/or correction data field (43). Said selection sub-headers (44) are disconnected from the respective containers and collected in at least one dedicated service container subjected to simplified channel coding to enable the receivers to detect the presence of a container dedicated thereto by low-cost decoding analysis of said dedicated service container, said selection sub-headers (44) further containing access data (410) for determining the position of the corresponding container in said data path. The above system enables the digital audio broadcasting (DAB) standard to be used for broadcasting paging data.
    • 要被多个接收机特别是限制范围的接收机接收的数字信号,并被划分为信号帧,其信号帧至少包括由子信道组成的主数据信道和包括至少一个数据的数据传输路径 通道由独立的数据块组成,专用于单个服务并称为容器。 每个容器包括由包括用于识别至少一个容器目的地接收器的组的数据(46)以及服务子标题(45)的选择子标题(44)组成的报头(41) 特别是专用服务数据; 单独卷积编码的工作数据字段(42),其包含给定服务的源数据; 以及错误检测和/或校正数据字段(43)。 所述选择子标题(44)与相应的容器断开连接并被收集在经过简化信道编码的至少一个专用服务容器中,以使得接收机能够通过所述专用的低成本解码分析来检测专用于其的容器的存在 所述选择子标题(44)还包含用于确定所述数据路径中相应容器的位置的访问数据(410)。 上述系统使数字音频广播(DAB)标准可用于广播寻呼数据。
    • 2. 发明申请
    • PERCEPTUAL IMAGE DISTORTION EVALUATION
    • PERCEPTUAL图像失真评估
    • WO1998030979A1
    • 1998-07-16
    • PCT/FR1997002222
    • 1997-12-05
    • TELEDIFFUSION DE FRANCEFRANCE TELECOMBLIN, Jean, Louis
    • TELEDIFFUSION DE FRANCEFRANCE TELECOM
    • G06T09/00
    • G06T9/00
    • The invention concerns a method for evaluating perceptual image quantization distortion in a fixed image. This method takes into account the specific characteristics of the visual processing of an image to obtain the most accurate evaluation, based on the difference between the reference image (9) and the tested image (8) divided into a plurality of image blocks (I). On the basis of each image block (I), the method consists in computing (1) the luminance point Li,j and the adaptation luminance La, in a non-linear processing (2; 10) and in computing the intermediate contrast (2; 11) DELTA Li,j* = Li,j*-La*, in filtering it (3; 12) according to the spatial orientation of the frequencies, in separating (4;13) the frequencies according to orientation, in a second non linear processing (5; 14), and by computing the point-to-point difference weighted by frequency spatial orientation between the obtained intermediate contrast values, in deducing therefrom the value for each tested image block, the local perceptual contrast distortion.
    • 本发明涉及一种用于评估固定图像中的感知图像量化失真的方法。 该方法基于分割为多个图像块(I)的参考图像(9)和被测图像(8)之间的差异,考虑图像的可视处理的特定特征以获得最准确的评估, 。 在每个图像块(I)的基础上,该方法包括在非线性处理(2; 10)和计算中间对比度(2)中计算(1)亮点Li,j和适应亮度La ; 11)DELTA Li,j * = Li,j * -La *,根据频率的空间取向在根据取向分离(4; 13)频率时对其进行滤波(3; 12) 通过计算由获得的中间对比度值之间的频率空间取向加权的点对点差异,从而推算出每个测试图像块的值,本地感知对比度失真。
    • 3. 发明申请
    • ADAPTIVE SUB-BAND FILTERING
    • 自适应滤波滤波
    • WO1996035266A1
    • 1996-11-07
    • PCT/FR1996000664
    • 1996-05-02
    • FRANCE TELECOMTELEDIFFUSION DE FRANCEDE COURVILLE, MarcDUHAMEL, PierrePALICOT, JacquesMADEC, Philippe
    • FRANCE TELECOMTELEDIFFUSION DE FRANCE
    • H04B03/21
    • H03H21/0027H04B3/21
    • A digital signal adaptive filtering method and device are described. The transmitted signal (xn), which is representative of a post-transmission distorted source signal (dn), is adaptively filtered (W*) (1001) to generate a filtered transmitted digital signal (yn). An error signal (en) is formed (1002), which is representative of the algebraic difference between the source signal (dn) and the filtered transmitted digital signal (yn), and which is subdivided (1003), through an orthogonal breaking-up step resulting in a number (N) of frequency sub-bands, into sub-band error signals (ei,n), i ELEMENT [0,N-1]. Each sub-band error signal is sub-sampled in a ratio of (N) and the sub-sampled sub-band error signals (eik) are weighted (1004) with coefficients ( lambda i). The transmitted digital signal (xn) is subdivided (1005) into (N) sub-bands (xi,n) and an adaptation function ( DELTA W*) of the adaptive filter is established (1007) as the sum of the product of each conjugated sub-band component of the transmitted digital signal and the sub-sampled weighted sub-band error signal, to which an adaptive pitch ( mu ) has been allocated. The invention is useful for speech signal echo equalising and cancelling.
    • 描述了数字信号自适应滤波方法和装置。 代表发射后失真源信号(dn)的发射信号(xn)被自适应滤波(W *)(1001)以产生经滤波的发射数字信号(yn)。 形成了代表源信号(dn)和滤波后的发送数字信号(yn)之间的代数差,并通过正交分解(1003)进行细分的误差信号(en1)(1002) 步骤,产生一个(N)个频率子带,成为子带误差信号(ei,n),iELEMENT [0,N-1]。 每个子带误差信号以(N)的比率被子采样,并且子系数(λi)对子采样子带误差信号(eik)进行加权(1004)。 发送的数字信号(xn)被细分为(100)为(N)个子带(xi,n),并且自适应滤波器的自适应函数(DELTA W *)被建立为(1007),作为每个 发送数字信号的共轭子带分量和被分配了自适应音调(mu)的子采样加权子带误差信号。 本发明对于语音信号回波均衡和消除是有用的。
    • 9. 发明申请
    • DIGITAL TELEVISION SIGNAL CODING RATE REGULATION METHOD USING TIME PREDICTION AND MOTION COMPENSATION
    • 使用时间预测和运动补偿的数字电视信号编码率调节方法
    • WO1996022657A1
    • 1996-07-25
    • PCT/FR1996000058
    • 1996-01-12
    • FRANCE TELECOMTELEDIFFUSION DE FRANCETHOMAS, Vincent
    • FRANCE TELECOMTELEDIFFUSION DE FRANCE
    • H04N07/50
    • H04N19/179H04N19/115H04N19/126H04N19/146H04N19/152H04N19/176H04N19/61
    • A method for the DCT coding rate regulation and motion-compensated time prediction of a digital television signal. The current Tn and next Tn+1 frames are subjected to a quantization process (101) with a quantization pitch qn, qn+1 generating a frame rate dn, dn+1, whereafter the method comprises, for each current frame, approximating (102) the law of variation of the coding rate logarithm to a linear function of the quantization pitch logarithm Log(dn) = a - 1/m Log(qn), where a and m are substantially constant test values. The quantization pitch qn of the current frame is adapted (103) to a value qn+1 for the next frame by an adapting coefficient r, qn+1 = r.qn with r = (dn/dc) where dc is a target rate for successively adjusting the rate dn+1 of the next frame to the value of the target rate dc. The method is useful for coding conventional or high-definition digital television signals.
    • 一种用于数字电视信号的DCT编码速率调节和运动补偿时间预测的方法。 对当前Tn和下一个Tn + 1帧进行量化处理(101),其量化间距qn,qn + 1产生帧速率dn,dn + 1,之后该方法包括对于每个当前帧近似(102 )编码率对数的变化规律为量化间距对数Log(dn)= a-1 / m Log(qn)的线性函数,其中a和m基本上是恒定的测试值。 当前帧的量化间距qn适应(103)到下一帧的值qn + 1,其适应系数r,qn + 1 = r.qn,其中r =(dn / dc) 用于将下一帧的速率dn + 1连续调整为目标速率dc的值的目标速率。 该方法对于编码常规或高清数字电视信号是有用的。