公开(公告)号：WO1986007226A1

公开(公告)日：1986-12-04

申请号：PCT/US1986000825

申请日：1986-04-17

Applicant: SCIENTIFIC ATLANTA, INC.

Inventor： SCIENTIFIC ATLANTA, INC. ,  LOWRY, John, D. ,  LUCAS, Keith

IPC: H04N07/167

CPC classification number: H04N7/1696

Abstract: A method and apparatus for creating a television signal and encrypting or decrypting the signal at the same time. Luminance and chrominance information are received by the apparatus and stored in separate television scan line stores (38a, 38b). The stored luminance and chrominance information is read out from their respective stores at a frequency corresponding to a desired format or standard to create the television signal. The signal may be simultaneously encrypted or decrypted by delaying the time at which the luminance and/or chrominance information is read out in accordance with an encryption or decryption key.

Abstract translation: 一种用于创建电视信号并且同时对信号进行加密或解密的方法和装置。 亮度和色度信息由设备接收并存储在单独的电视扫描线存储器（38a，38b）中。 存储的亮度和色度信息以对应于期望的格式或标准的频率从其各自的存储中读出，以产生电视信号。 可以通过延迟根据加密或解密密钥读出亮度和/或色度信息的时间来同时加密或解密该信号。

公开(公告)号：WO1993010637A1

公开(公告)日：1993-05-27

申请号：PCT/US1992009841

申请日：1992-11-17

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ISRAELSEN, Paul, D. ,  LUCAS, Keith

IPC: H04N07/13

CPC classification number: G10L19/038 ,  G06T9/008 ,  H04N5/765 ,  H04N7/10 ,  H04N19/94

Abstract: A method and apparatus wherein fixed-rate vector quantized data is transmitted from a first location (12) to a second location (14) via a first medium (18). The fixed-rate vector quantized data is received at the second location (14) and transformed (28) to variable-rate vector quantized data. Then, the transformed variable-rate vector quantized data is transmitted (30) to a third location (32) via a second medium. At the third location, the variable rate vector quantized data may be received, and if desired, transformed back to fixed-rate form (34). A distortion adaptive vector quantization method is employed to transform the fixed rate vector quantization data to variable rate vector quantization data.

公开(公告)号：WO1986001967A1

公开(公告)日：1986-03-27

申请号：PCT/US1985001699

申请日：1985-09-06

Applicant: SCIENTIFIC ATLANTA, INC.

Inventor： SCIENTIFIC ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N11/08

CPC classification number: H04N9/44 ,  H04N7/083 ,  H04N11/08

Abstract: In a Multiplexed Analog Component (MAC) color television transmission system in which the MAC signal is to be converted at the receiver to a composite color television signal having a 227.5 fH color subcarrier, frequency-generation equipment required at the receiver is simplified by selecting the various frequencies in accordance with relationship (I), where: fO is the master clock frequency, f1 is the luminance sampling frequency, f2 is the chrominance sampling frequency, f4 is the MAC sampling frequency, fH is the horizontal line frequency, and n and k are positive integers.

公开(公告)号：WO1994013101A1

公开(公告)日：1994-06-09

申请号：PCT/US1993011538

申请日：1993-11-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N05/262

CPC classification number: H04N21/4347 ,  H04N5/262 ,  H04N5/45 ,  H04N19/48 ,  H04N19/90 ,  H04N21/2365

Abstract: A method for generating a picture-in-picture digital television frame comprising the step of: converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels; deriving a mean-only frame (20) from the first digital frame, the mean-only frame comprising a second prescribed number of pixels; creating an insertion (50) frame on the basis of the mean-only frame; and inserting (40) the insertion frame into a second digital frame, thereby generating a picture-in-picture digital frame.

Abstract translation: 一种用于产生画中画数字电视帧的方法，包括以下步骤：将第一模拟电视信号转换成包括第一规定数量的像素的第一数字帧; 从所述第一数字帧导出仅平均帧（20），所述均值帧包括第二规定数量的像素; 基于均值帧创建插入（50）帧; 并将插入帧插入（40）到第二数字帧中，从而生成画中画数字帧。

公开(公告)号：WO1993010635A1

公开(公告)日：1993-05-27

申请号：PCT/US1992009574

申请日：1992-11-06

Applicant: SCIENTIFIC-ATLANTA, INC

Inventor： SCIENTIFIC-ATLANTA, INC ,  LUCAS, Keith

IPC: H04N07/13

CPC classification number: G06T9/008 ,  H04N7/10 ,  H04N19/94

Abstract: A method and apparatus for low-frequency removal in vector quantization of an image frame. An image frame (20) is converted to plurality of input vectors (22). A mean value of each input vector is determined and transmitted (18) to a plurality of reception sites (14, 16). A low-frequency component of each input vector is then determined and removed from the input vector. A scalar mean value of each low-frequency removed vector is then determined and subtracted therefrom to produce a residual vector. The residual vectors are then vector quantized and the vector quantized data is transmitted to the reception sites. At a reception site, the transmitted means values and vector quantized data are received and each input vector is reproduced (28, 38) therefrom. From the reproduced input vectors, the image frame is re-created for display at the reception site (32, 40).

公开(公告)号：WO1986007224A1

公开(公告)日：1986-12-04

申请号：PCT/US1986000801

申请日：1986-04-21

Applicant: SCIENTIFIC ATLANTA, INC.

Inventor： SCIENTIFIC ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N07/167

CPC classification number: H04L9/0822 ,  H04L9/0891 ,  H04L9/14 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/26606 ,  H04N21/4405

Abstract: A method and apparatus for descrambling a television signal using a three tier encryption technique for the code used to descramble the signal. At the transmitter, a distribution key (41) is used to encrypt a session key. The encrypted session key (40.1) is transmitted in the digital data channel (40) of the television signal. The session key is also used to encrypt the descramble code (40.2) which is also transmitted in the data channel (40) of the television signal. At the receiver (42) the encrypted session key (43) is decrypted using a distribution key (41). The decrypted session key (43), is in turn used to decrypt the descramble code (44). The descramble code may then be used to descramble and/or decrypt other signals (45, 46, 47) in the receiver.

Abstract translation: 一种使用三层加密技术对用于对信号进行解扰的代码对电视信号进行解扰的方法和装置。 在发射机处，分配密钥（41）用于加密会话密钥。 加密会话密钥（40.1）在电视信号的数字数据信道（40）中发送。 会话密钥还用于加密也在电视信号的数据信道（40）中发送的解扰码（40.2）。 在接收机（42）处，使用分配密钥（41）解密加密会话密钥（43）。 解密的会话密钥（43）又用于解密解密码（44）。 然后可以使用解扰码解扰和/或解密接收机中的其他信号（45,46,47）。

公开(公告)号：WO1994010775A1

公开(公告)日：1994-05-11

申请号：PCT/US1993010491

申请日：1993-11-01

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, J. ,  LUCAS, Keith

IPC: H04K01/02

CPC classification number: H04H20/28 ,  H04N7/1675 ,  H04N7/17318 ,  H04N7/20 ,  H04N21/2221 ,  H04N21/2347 ,  H04N21/23608 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2365 ,  H04N21/4345 ,  H04N21/4347 ,  H04N21/4405 ,  H04N21/6332

Abstract: A plurality of digital services (V'1-V'N' and A'1-A'N') are carried in a multiplex data stream (162) to a plurality of remote locations. The multiplex data stream (162) comprises a continuous sequence of frames (156). Each frame (156) comprises two consecutive fields, and each field comprises a plurality of lines. A first group of the lines in each field defines a transport layer region of that field, and a second group of the lines defines a service data region. Portions of the service data region of each field are allocated to respective ones of the video services in proportion to respective data rates of each service. A multiplex control packet is generated (104) for each field that specifies, for each service, which portion of the service data region is allocated to that service. A multiplex map (104) is transmitted with each field, and therefore, the number and location of packets may be dynamically adjusted on a per field basis.

Abstract translation: 多个数字服务（V'1-V'N'和A'1-A'N'）在多路复用数据流（162）中被携带到多个远程位置。 复用数据流（162）包括连续的帧序列（156）。 每个帧（156）包括两个连续的场，并且每个场包括多个行。 每个字段中的第一组行定义该字段的传输层区域，并且第二组行定义服务数据区域。 每个视频服务的服务数据区域的部分按照每个服务的相应数据速率的比例分配给视频服务的相应的一部分。 为每个字段生成多路复用控制分组（104），对于每个服务，为服务数据区域的哪个部分分配给该服务。 与每个字段一起发送复用映射（104），因此可以在每个字段的基础上动态地调整数据包的数量和位置。

公开(公告)号：WO1993010628A1

公开(公告)日：1993-05-27

申请号：PCT/US1992010236

申请日：1992-11-17

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ISRAELSEN, Paul, Dee ,  LUCAS, Keith

IPC: H04N05/21

CPC classification number: H04N7/012 ,  H04N5/144 ,  H04N19/112 ,  H04N19/132 ,  H04N19/587 ,  H04N19/80

Abstract: A method and apparatus for processing fields (XA, XB, XC) of a video signal that are to be combined (28) into a frame, compressed and communicated over a digital communications system. The processing technique increases the spatial correlation between pixels at a cost of slightly reduced resolution in area of the frame where there is movement. The method employs a motion detector (14, 16, 18) to separate moving and non-moving areas of the frame. A simple combination of lines from a first field and second field can be used in static areas. In moving areas, a digital filter (20) is applied to the fields to increase correlation in the resulting field. A digital compression technique such as vector quantization is applied to the resulting frame-based signal.

公开(公告)号：WO1990006038A1

公开(公告)日：1990-05-31

申请号：PCT/US1989005044

申请日：1989-11-16

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N11/02

CPC classification number: H04N11/006 ,  H04N7/0152 ,  H04N11/08 ,  H04N19/186 ,  H04N19/59

Abstract: Apparatus for encoding a high definition multiplexed analog components television signal by decimating predetermined samples for transmission comprises separate processing paths (Figs. 17 and 18) for luminance and chrominance component signals respectively. The separately processed luminance and chrominance components signals are multiplexed into a composite signal for transmission via a skew-symmetric filter portion (1710) shared by both processing paths. A complementary skew-symmetric filter portion (1901) to the filter portion of the encoder apparatus is associated with a decoder coupled to a high definition television receiver. Predetermined samples are diagonally filtered and horizontal resolution information folded into the signal. Vertical resolution is improved through scan conversion at the receiver.

Abstract translation: 用于通过抽取预定样本进行传输来对高分辨率多路复用模拟分量电视信号进行编码的装置分别包括用于亮度和色度分量信号的单独处理路径（图17和18）。 单独处理的亮度和色度分量信号被复用到复合信号中，以经由由两个处理路径共享的偏斜对称滤波器部分（1710）传输。 到编码器装置的滤波器部分的互补偏斜对称滤波器部分（1901）与耦合到高分辨率电视接收机的解码器相关联。 预定样本对角线滤波，水平分辨率信息折叠成信号。 通过接收机的扫描转换提高垂直分辨率。

公开(公告)号：WO1990004309A1

公开(公告)日：1990-04-19

申请号：PCT/US1989004431

申请日：1989-10-10

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N07/12

CPC classification number: H04N7/083 ,  H04N7/015 ,  H04N11/006

Abstract: A method for encoding a high definition television signal consistent with the B-MAC composite signal format comprises the steps of orthogonally sampling the high definition signal, diagonally filtering diagonal resolution information, decimating alternate samples of alternate lines and folding in high frequency horizontal resolution information by means of a skew-symmetric low-pass filter. Encoding apparatus involves the application of separable horizontal and vertical digital filters for the diagonal filter, the vertical filter being less complex than the horizontal filter. Furthermore, only a line store is required at either an encoder or decoder location. At a receiver location, a field store and proprietary line doubling techniques may be provided and applied for obtaining vertical resolution improvement.

Abstract translation: 用于对与B-MAC复合信号格式一致的高分辨率电视信号进行编码的方法包括以下步骤：对高分辨率信号进行正交采样，对角滤波对角线分辨率信息，抽取交替行的交替采样，并以高频水平分辨率信息折叠， 偏斜对称低通滤波器的手段。 编码装置涉及对角滤波器应用可分离的水平和垂直数字滤波器，垂直滤波器比水平滤波器复杂得多。 此外，在编码器或解码器位置仅需要线路存储器。 在接收机位置，可以提供现场存储和专有线倍增技术并应用于获得垂直分辨率改进。