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公开(公告)号：WO1991002431A2
公开(公告)日：1991-02-21
申请号：PCT/US1990004078
申请日：1990-07-19
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GENERAL ELECTRIC COMPANY , JONNALAGADDA, Krishnamurthy , GIBSON, James, John , WAGNER, Theodor, Matthias
IPC: H04N11/00
CPC classification number: H04N11/006
Abstract: Apparatus for augmenting a television signal with auxiliary signal includes circuitry for modulating a picture carrier with baseband video signal to generate a vestigial sideband television signal. Auxiliary signal (54) is modulated on a further carrier (CA) of such frequency that the upper sidebands fp - (2n+1)fH/2 of the modulated further carrier, representing the auxiliary information, 1) occupy the frequency spectrum of the vestigial sideband of the vestigial sideband television signal (50) and 2) occur clustered at odd multiples of half line frequency. The sidebands of the modulated further carrier are added (52) to the vestigial sideband television signal in frequency interleaved fashion in the vestigial sideband spectral region.
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公开(公告)号：WO1989012372A1
公开(公告)日：1989-12-14
申请号：PCT/US1989001789
申请日：1989-05-03
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GENERAL ELECTRIC COMPANY , WALTER, James, Morgan , JONNALAGADDA, Krishnamurthy , FLORY, Robert, Earl
IPC: H04N09/79
CPC classification number: H04N11/008 , H04N9/7976 , H04N9/82
Abstract: Extended definition television (EDTV) signals including a compatible composite wideband signal (SWB) and a separate helper or extended definition signal (SNB) are combined (18), for example, for recording purposes (20), using frequency multiplexing techniques. The helper signal (SNB) is applied to a modulator (16), which produces a suppressed carrier modulated signal, to frequency shift the helper signal to a spectral band above the frequency band occupied by the compatible composite wideband signal. The frequency shifted and wideband signal are then added (18) to form the combined signal.
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公开(公告)号：WO1993025034A1
公开(公告)日：1993-12-09
申请号：PCT/US1993004238
申请日：1993-05-11
Applicant: GENERAL ELECTRIC COMPANY
IPC: H04L27/34
CPC classification number: H04L27/3438
Abstract: An encoding scheme resistant to transmission errors encodes a data bitstream for application to a quadrature amplitude modulator (QAM) in a high definition television system. The error-resistant code provides a rotationally symmetrical 32-point constellation on a plane defined by I, Q quadrature axes. The constellation is divided into first (A) and second (B) partitions arranged so that constellation points that are closest in distance to any constellation point of the first partition belong to the second partition, and constellation points that are closest in distance to any constellation point of the second partition belong to the first partition. The binary value of one bit of each of successive 9-bit packets in the bitstream determines that one of the two partitions (A, B) to which both of a consecutive pair of first and second constellation-point transmissions belong (the first and second transmitted constellation-points of that consecutive pair being selected by the then current 9-bit packet of the stream). The code is such that the binary values of such one bit of each of alternate ones of the successive 9-bit packets are opposite to one another. This permits a receiver decoder to decide whether each received constellation-point belongs to a first or a second constellation, thereby permitting the detection and, in most cases, the correction of transmission errors.
Abstract translation: 针对传输错误的编码方案编码用于应用于高分辨率电视系统中的正交幅度调制器（QAM）的数据比特流。 防错码在由I，Q正交轴定义的平面上提供旋转对称的32点星座。 星座被分成布置成第一（A）和第二（B）分区，使得距离第一分区的任何星座点的距离最近的星座点属于第二分区，并且距离到任何星座最近的星座点 第二个分区的点属于第一个分区。 比特流中每个连续的9比特分组的一比特的二进制值确定了连续的第一和第二星座点传输对中的两个分区（A，B）中的一个属于（第一和第二 该连续对的传输星座点由流的当前当前9比特分组选择）。 代码是使得连续的9位分组中的每一个的每一个的这一个比特的二进制值彼此相反。 这允许接收机解码器确定每个接收到的星座点是否属于第一或第二星座，从而允许检测，并且在大多数情况下允许传输错误的校正。
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Patent Agency Ranking
公开(公告)号：EP0495772A1
公开(公告)日：1992-07-29
申请号：EP89906243.0
申请日：1989-05-03
Applicant: GENERAL ELECTRIC COMPANY
CPC classification number: H04N11/008 , H04N9/7976 , H04N9/82
Abstract: Des signaux de télévision à définition étendue (EDTV) comprenant un signal à bande large composite compatible (SWB) et un signal de définition étendue ou d'aide séparée (SNB) sont combinés (18), par exemple à des fins d'enregistrement (20) en utilisant des techniques de multiplexage de fréquence. Le signal d'aide (SNB) est appliqué à un modulateur (16) qui produit un signal modulé à porteuse supprimée pour déplacer en fréquence le signal d'aide vers une bande spectrale supérieure à la bande de fréquence occupée par le signal de large bande composite compatible. Le signal à fréquence décalée et le signal à bande large sont ensuite additionnés (18) pour former le signal combiné.
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公开(公告)号：EP0643894A1
公开(公告)日：1995-03-22
申请号：EP93911071.0
申请日：1993-05-11
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GUIDA, Allan, Abraham , JONNALAGADDA, Krishnamurthy
CPC classification number: H04L27/3438
Abstract: An encoding scheme resistant to transmission errors encodes a data bitstream for application to a quadrature amplitude modulator (QAM) in a high definition television system. The error-resistant code provides a rotationally symmetrical 32-point constellation on a plane defined by I, Q quadrature axes. The constellation is divided into first (A) and second (B) partitions arranged so that constellation points that are closest in distance to any constellation point of the first partition belong to the second partition, and constellation points that are closest in distance to any constellation point of the second partition belong to the first partition. The binary value of one bit of each of successive 9-bit packets in the bitstream determines that one of the two partitions (A, B) to which both of a consecutive pair of first and second constellation-point transmissions belong (the first and second transmitted constellation-points of that consecutive pair being selected by the then current 9-bit packet of the stream). The code is such that the binary values of such one bit of each of alternate ones of the successive 9-bit packets are opposite to one another. This permits a receiver decoder to decide whether each received constellation-point belongs to a first or a second constellation, thereby permitting the detection and, in most cases, the correction of transmission errors.
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公开(公告)号：EP0485478A1
公开(公告)日：1992-05-20
申请号：EP90912271.0
申请日：1990-07-19
Applicant: GENERAL ELECTRIC COMPANY
CPC classification number: H04N11/006
Abstract: Appareil pour enrichir un signal de télévision d'un signal auxiliaire. Il se compose d'un ensemble de circuits destinés à moduler une porteuse d'images avec un signal vidéo en bande de base afin de produire un signal de télévision en bande latérale résiduelle. Le signal auxiliaire (54) est ensuite modulé sur une nouvelle porteuse (CA) ayant une fréquence telle que les bandes latérales supérieures fp-(2n+1)fH/2 de la nouvelle porteuse ainsi modulée, représentant l'information auxiliaire, 1) occupent le spectre de fréquences de la bande latérale résiduelle du signal de télévision de cette même bande (50), et 2) apparaissent groupées aux multiples impairs de la fréquence de demi-ligne. Les bandes latérales de la nouvelle porteuse modulée sont ajoutées (52) au signal de télévision de la bande latérale résiduelle en fréquences imbriquées dans le domaine spectral de la bande latérale résiduelle.
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公开(公告)号：EP0643894B1
公开(公告)日：1998-08-05
申请号：EP93911071.4
申请日：1993-05-11
Applicant: GENERAL ELECTRIC COMPANY
Inventor： GUIDA, Allan, Abraham , JONNALAGADDA, Krishnamurthy
IPC: H04L27/34
CPC classification number: H04L27/3438
Abstract: An encoding scheme resistant to transmission errors encodes a data bitstream for application to a quadrature amplitude modulator (QAM) in a high definition television system. The error-resistant code provides a rotationally symmetrical 32-point constellation on a plane defined by I, Q quadrature axes. The constellation is divided into first (A) and second (B) partitions arranged so that constellation points that are closest in distance to any constellation point of the first partition belong to the second partition, and constellation points that are closest in distance to any constellation point of the second partition belong to the first partition. The binary value of one bit of each of successive 9-bit packets in the bitstream determines that one of the two partitions (A, B) to which both of a consecutive pair of first and second constellation-point transmissions belong (the first and second transmitted constellation-points of that consecutive pair being selected by the then current 9-bit packet of the stream). The code is such that the binary values of such one bit of each of alternate ones of the successive 9-bit packets are opposite to one another. This permits a receiver decoder to decide whether each received constellation-point belongs to a first or a second constellation, thereby permitting the detection and, in most cases, the correction of transmission errors.
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公开(公告)号：EP0485478B1
公开(公告)日：1995-04-19
申请号：EP90912271.5
申请日：1990-07-19
Applicant: GENERAL ELECTRIC COMPANY
IPC: H04N11/00
CPC classification number: H04N11/006
Abstract: Apparatus for augmenting a television signal with auxiliary signal includes circuitry for modulating a picture carrier with baseband video signal to generate a vestigial sideband television signal. Auxiliary signal (54) is modulated on a further carrier (CA) of such frequency that the upper sidebands fp - (2n+1)fH/2 of the modulated further carrier, representing the auxiliary information, 1) occupy the frequency spectrum of the vestigial sideband of the vestigial sideband television signal (50) and 2) occur clustered at odd multiples of half line frequency. The sidebands of the modulated further carrier are added (52) to the vestigial sideband television signal in frequency interleaved fashion in the vestigial sideband spectral region.
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