-
公开(公告)号：EP0096921A3
公开(公告)日：1984-02-22
申请号：EP83200798
申请日：1983-06-03
IPC分类号： H04N09/02
CPC分类号： H04N11/004
摘要： A high definition colour television transmission system in which wide band luminance information (Y, Figure 1) is utilised to produce a first luminance information portion comprising lower frequency (0 to 3.8 MHz) and middle frequency (3.8 to 5.5 MHz) components and a second luminance information portion comprising the middle frequency (3.8 to 5.5 MHz) and upper frequency (5.5 to 8.8 MHz) components. The first luminance information portion (Y1, Figure 2) is transmitted by way of a first transmission path together with a colour subcarrier (f sc ) modulated by colour information. The bandwidth of the colour information is such that the modulation components lie substantially within the bandwidth of the middle frequency components. The second luminance information portion is frequency shifted to lie within 0 and 5 MHz (Y2, Figure 3) and is transmitted by way of a second transmission path. The two transmissions may also carry sound signals (f s1 , Figure 1, f s2 , Figure 3). The two transmissions may be jointly received for the provision of a high definition display but the invention has the distinct advantage that the signal of te first transmission path may be received alone by currently manufactured television receivers for reproduction of a display of a quality which is accepted as normal.
-
2.发明公开A dual mode encoding/decoding technique for use in a digital transmission system 失效用于数字传输系统的双模式编码/解码技术
公开(公告)号：EP0105604A3
公开(公告)日：1985-05-29
申请号：EP83305037
申请日：1983-09-01
CPC分类号： H04N11/046 , H04B14/046 , H04N19/90
摘要： A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an allotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes predictive diferential coding to provide a precision which can be greater than that obtainable by coding information solely with the allotted number of bits, while the second mode assures at least a minimum precision for the allotted number of bits. The first coding mode is transmitted as long as a preselected precision is provided. If not, the second coding mode is transmitted. In the disclosed embodiment, the dual mode encoding/decoding technique is applied to the transmission of color video signals.
-
公开(公告)号：EP0084914A3
公开(公告)日：1983-08-17
申请号：EP83200081
申请日：1983-01-19
IPC分类号： H04N09/02 , H04N09/497
CPC分类号： H04N9/7973 , H04N9/8255 , H04N11/004
摘要： A high definition colour television transmission system in which wide band luminance information (Y, Figure 1) is divided to produce a first luminance information portion (below 3.8 MHz) and a second luminance information portion (between 3.8 and 8.8 MHz). The first luminance information portion (Y1, Figure 2) is transmitted by way of a first transmission path together with a colour subcarrier (f sc ) modulated by colour information. The bandwidth of the colour information is such that the modulation components lie outside the bandwidth of the first luminance information portion. The second and higher frequency luminance information portion is frequency shifted to lie within 0 and 5 MHz (Y2, Figure 3) and is transmitted by way of a second transmission path. The two transmissions may also carry sound signals (fsi, Figure 2; f S2 , Figure 3). The two transmissions may be jointly received for the provision of a high definition display but the invention has the distinct advantage that the signal of the first transmission path may be received alone by currently manufactured television receivers for reproduction of a display of a quality which is currently acceptable.
-
公开(公告)号：EP0103488A3
公开(公告)日：1986-06-25
申请号：EP83305384
申请日：1983-09-14
IPC分类号： H04N09/02
CPC分类号： H04N9/87 , F02B2075/027 , H04N5/772 , H04N5/9205 , H04N7/01 , H04N7/012 , H04N9/797 , H04N11/002
摘要： This concerns an apparatus and method for encoding and/or decoding video signals for use in a compatible high definition television system or in other applications. In a form of the disclosure there is provided an encoder which includes means (300) for storing an input frame as an array of digital pixel values, and means (600) for interrogating the stored array and for generating a sum signal (I) and at least one difference signal (X, Y, Z). The sum signal is representative of the sum of the pixel values in a group of pixels. The difference signal (e.g. X n ) is representative of the difference between thetotal of the pixel values in some of the pixels (Ao n , Bo n ) in the group and the total of the pixel values of other pixels (A in , Bin) in the group. The sum signal and the difference signal are generated for a multiplicity of groups which cover the video frame. The sum signal is generated at a relatively high information refresh rate and the difference signal is generated at a relatively low information refresh rate. The decoder includes means for storing the sum signal and each of the difference signals, and means for combining the sum and difference signals to obtain an output pixel value for each pixel of an output video frame. In another form of the invention (Fig. 20), electronic processing is performed to obtain low and high spatial frequency component representations of the image represented by the video signal, and these are stored in a digital memory in the encoder. Output frames of the low spatial frequency component representation are produced at a fast frame refresh rate, and output frames of the high spatial frequency component representation are produced at a slow frame refresh rate.
-
公开(公告)号：EP0118755A3
公开(公告)日：1985-11-13
申请号：EP84101250
申请日：1984-02-07
-
公开(公告)号：EP0081223A3
公开(公告)日：1986-10-22
申请号：EP82111265
申请日：1982-12-06
发明人： Pexa, Günther
IPC分类号： H04N09/02
CPC分类号： H04N11/042
-
公开(公告)号：EP0125074A3
公开(公告)日：1985-12-27
申请号：EP84302830
申请日：1984-04-26
申请人： Riddle, David , Seiderman, Maurice
发明人： Riddle, David
IPC分类号： H04N09/02
CPC分类号： H04N11/00
摘要： Light patterns are produced by directing a television ;amera (10) at the screen (20) of a television monitor (12) iriven by the video output signal of the camera (10). A beam splitter (24) is located in the optical path of the camera (10) between the camera (10) and monitor (12). The beam splitter 24) and a light source (26), off-axis with respectto the camera 10), may be employed to introduce light, varying in position or intensity, into the system to produce varying patterns on he television monitor (12).
摘要翻译： 通过在由照相机（10）的视频输出信号驱动的电视监视器（12）的屏幕（20）处引导电视摄像机（10）来产生照明图案。 分束器（24）位于相机（10）和监视器（12）之间的照相机（10）的光路中。 可以使用分束器（24）和相对于照相机（10）离轴的光源（26），以将位置或强度变化的光引入系统中，以在电视监视器上产生变化的图案 （12）。
-
公开(公告)号：EP0097858A3
公开(公告)日：1986-10-15
申请号：EP83105713
申请日：1983-06-10
IPC分类号： H04N09/02 , H04N09/535 , H03M07/30
CPC分类号： H04N11/042 , G06T9/008 , H03M7/3082 , H04N9/64 , H04N19/50 , H04N19/94
摘要： A vector quantizer receives a plurality of input signals (4) in block form and operates to determine an output vector (15) having the least distortion with respect to an input vector by various techniques. A coded output or output vector codetable address is output from a coder (7) of the device for receipt by a decoder (8) which constructs a proper output vector signal (15).
-
9.发明公开Method of colour space encoding digital colour video signals, and system using such a method 失效彩色空间编码数字彩色视频信号的方法和使用这种方法的系统
公开(公告)号：EP0107072A3
公开(公告)日：1986-07-02
申请号：EP83109563
申请日：1983-09-26
IPC分类号： H04N09/02
CPC分类号： H04N11/042
摘要： Es wird eine nichtlineare Transformation der RGB (ROT/GRÜN/BLAU)-Darstellung für jeden Bildpunkt durch geführt, wobei die Aufteilung eines gedachten RGB-Farb raums, dessen drei Dimensionen durch die Farbparameter R, G und B repräsentiert sind und wobei das betreffende Informationswort einen Raumvektor vertritt, in farbspezifi schen empfindungsmäßig gleichen Abstufungen erfolgt, so daß sich ein Farbraum mit unterschiedlich großen Volumen elementen in dem RGB-Farbraum ergibt. Das Verfahren führt zu einer vorteilhaften Datenreduktion.
摘要翻译： 对于每个像素，执行RGB（RED / GREEN / BLUE）表示的非线性变换，在该过程中，想象的RGB颜色空间，其三维由颜色参数R，G和B表示， 其中相关信息字表示一个空间矢量，被分为相对于感觉相等的特定颜色刻度，从而获得RGB颜色空间中具有不同大体积元素的颜色空间。 该方法导致有利的数据减少。
-
公开(公告)号：EP0113932A3
公开(公告)日：1986-06-25
申请号：EP83201791
申请日：1983-12-15
IPC分类号： H04N09/02
CPC分类号： H04N11/004
摘要： A high definition television transmission system in which a wide band interlaced television signal (Figure 2) having 1249 lines per field is divided to provide first and second interlaced television signals each having 625 lines per field and consequently reduced bandwidth. Adjacent lines of the first television signal have their low frequency information (0-3 MHz) (Figure 2) derived from alternate lines in the wide band signal whilst the corresponding information for adjacent lines in the second television signal (Figure 4) is derived from the intervening lines in the wide band signal. The high frequency information (3-5.5 or 6 MHz) for the lines of both the first and second television signals (Figure 7) is derived from the average of the corresponding information in adjacent lines of the wide band signal. The first television signal also contains a colour subcarrier which is modulated by the average of the colour information in adjacent lines of the wide band signal (Figure 7). The two television signals may be jointly received for the provision of a high definition display but the invention has the distinct advantage that the first television signal may be received alone by currently manufactured television receivers for reproduction of a display of a quality which is currently acceptable.
摘要翻译： 一种高清晰度电视传输系统，其中每场具有1249行的宽带隔行电视信号（图2）被划分以提供每场具有625行的第一和第二隔行扫描电视信号，并因此减少带宽。 第一电视信号的相邻行具有从宽带信号中的交替行导出的低频信息（0-3MHz）（图2），而第二电视信号（图4）中相邻行的相应信息是从 宽带信号中的中介线。 第一和第二电视信号（图7）的线路的高频信息（3-5.5或6MHz）是从宽带信号的相邻线路中的相应信息的平均值导出的。 第一个电视信号还包含一个彩色副载波，该彩色副载波由宽带信号的相邻行中的彩色信息的平均值调制（图7）。 两个电视信号可以共同接收用于提供高清晰度显示器，但是本发明具有明显的优点，即第一电视信号可以由当前制造的电视接收机单独接收用于再现当前可接受的质量的显示。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.006 秒)
