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1.发明公开
公开(公告)号：EP0885523A1
公开(公告)日：1998-12-23
申请号：EP97916204.0
申请日：1997-03-06
IPC分类号： H04N5
CPC分类号： H04N5/45
摘要： Apparatus for combining an auxiliary image and a main image includes a source of a main image video signal and a source of samples representing an auxiliary image video signal having successive fields. A quincunx subsampler is coupled to the auxiliary image sample source and subsamples the auxiliary image samples in either a first sample pattern in which samples are taken at a first set of horizontal locations, or a second sample pattern in which samples are taken at a second set of horizontal locations substantially midway between the first set, all in response to a control signal. A signal combiner is coupled to the quincunx subsampler and the main image signal source, and combines the main image signal and a signal representing the quincunx subsampled auxiliary image samples to generate a signal representing a combine image of the main and auxiliary images. A control circuit generates the quincunx subsampler control signal so that the quincunx subsampler takes samples in one of the sample patterns at the beginning of each auxiliary image video signal field, and in the other sample pattern after a switch time calculated so that the quincunx subsampled auxiliary image samples in the combined image all are taken by the same sample pattern.
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公开(公告)号：EP0832535A1
公开(公告)日：1998-04-01
申请号：EP96916538.0
申请日：1996-05-23
CPC分类号： H04N5/4401 , H04N5/765 , H04N5/775 , H04N7/52 , H04N9/7921 , H04N9/8042 , H04N21/4135 , H04N21/4223 , H04N21/4305 , H04N21/4334 , H04N21/4344 , H04N21/43632
摘要： A system for generating a signal for coupling digital audio, video and data signals in compressed form via a bus. A processing means formats the digital audio, video and data signals into superpackets for transmission via the bus. Each superpacket comprises a timestamp, and a transport packet, representative of the digital audio, video and data signals. The superpackets have a fixed duration and occur at variable intervals. Devices receive the superpacket signal and may utilize the timestamps for clock synchronization. A recording and replay device processes the variable superpacket signal occurrence for recording. Reproduced timestamps are utilized to control restoration of the superpacket signal to have substantially the duration and occurrence as when formatted for bus transmission. A simplified bus couples superpackets between devices. An indicia is added to a superpacket signal to provide automatic control of device bus interfaces. The automated interface control is also responsive to device control status.
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3.发明公开AUXILIARY VIDEO INFORMATION CODE CORRECTION IN SYNC-SUPPRESSION TYPE SCRAMBLED VIDEO SIGNALS 失效附加信息电视编码校正BY同步抑制ENCRYPTED电视信号
公开(公告)号：EP0706741A1
公开(公告)日：1996-04-17
申请号：EP94909729.0
申请日：1994-02-25
发明人： TULTS, Juri
IPC分类号： H04N7
CPC分类号： H04N7/0357 , H04N7/1713
摘要： A system for processing auxiliary video information, such as closed caption information, includes capability for detecting invalid parity errors that may be created by video signal distortion effects caused by sync suppression video signal scrambling. The sync suppression distortion does not affect the video display but may modify the parity bit of the second of two closed caption characters in each occurrence of line 21 of field 1 causing invalid parity errors. Parity errors in the first character, which is unaffected by the sync suppression distortion, indicate whether valid parity errors exist in the second character. If no parity errors occur in the first character, parity errors that occur in the second character are considered to be invalid.
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公开(公告)号：EP0701760A1
公开(公告)日：1996-03-20
申请号：EP94932159.0
申请日：1994-05-28
申请人： THOMSON multimedia
发明人： COLLET, Eric , KERDRANVAT, Michel
IPC分类号： H04N7
CPC分类号： H04N7/125 , H04N7/0157 , H04N19/523
摘要： For motion compensated interpolation (MCI) with sub-pixel accuracy the missing pixels need to be generated or interpolated prior to the motion compensation. The required pixel values (P, Q, R, S) are stored using line and pixel delays (DHV). A switch matrix selects in response to a motion vector such stored pixels which are currently needed for the processing. In order to avoid sub-pixel MCI, the interpolation (INT) is carried out prior to the motion compensation. Thus, the input data rate of the motion compensation circuitry is twice then that of the interpolation circuitry. The resulting hardware complexity is high. The invention leads to a reduced amount of stored data for performing a sub-pixel MCI using a simple switch matrix (SM), only. A special arrangement of delays (DH) storing pixel values needed for the processing is used to extend the existing delay array (DHV). Because an increased number of pixels involved is used, an improved sub-pixel MCI is achieved. This is possible due to the fact that such delay extension does not affect significantly the decoded picture quality even if adjacent motion vectors do not match exactly to the current motion vector. The invention can be used in every system making use of MCI, especially in decoders of coding systems based on spatio-temporal subsampling and motion compensation. Motion compensation and interpolation are achieved simultaneously at the clock frequency of the input data stream.
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公开(公告)号：EP0597002A1
公开(公告)日：1994-05-18
申请号：EP92916819.0
申请日：1992-08-03
IPC分类号： H04N7
CPC分类号： H04N7/0882
摘要： Selon les procédés adaptatifs connus de transmission de télétextes, les lignes de données dans les blocs de données qui correspondent à des lignes de télétexte non utilisées sont ''remplies'' d'en-têtes ou de leurs répétitions, ce qui allonge le cycle des données sans transmettre des informations utiles. Si au lieu des répétitions redondantes, on transmet d'autres données, des problèmes peuvent surgir dans les décodeurs classiques lors de l'effacement de la mémoire de pages auxiliaire. Selon l'invention, des blocs spéciaux de données ou des parties de ceux-ci sont transmis aux endroits qui étaient redondants dans l'état antérieur de l'art, ou l'en-tête correspondant à chaque bloc de données est transmis avant celui-ci avec un intervalle temporel suffisant (environ 20 millisecondes), un autre bloc de données étant inséré avant le bloc de données en question. Par adjonction appropriée de défauts binaires ou d'un bit en mode parallèle, on empêche l'interruption prématurée de la saisie de données par le décodeur.
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6.发明公开PARALLEL DECOMPRESSORS FOR RECOMPRESSED PIXEL DATA WITHIN AN MPEG DECODER 失效PARALLELDEKOMPRIMIERER FOR再压缩PIXEL数据中的MPEG解码器
公开(公告)号：EP0945028A1
公开(公告)日：1999-09-29
申请号：EP97953181.0
申请日：1997-12-15
CPC分类号： H03M7/40 , G06T9/007 , H04N5/4401 , H04N5/46 , H04N11/044 , H04N19/13 , H04N19/186 , H04N19/40 , H04N19/42 , H04N19/423 , H04N19/428 , H04N19/436 , H04N19/439 , H04N19/59 , H04N19/60 , H04N19/61 , H04N19/895 , H04N19/90 , H04N19/91 , H04N21/4305
摘要： An MPEG decoder (14, 18, 22) in a high definition television receiver decodes and decompresses MPEG coded data to produce decompressed image pixel blocks, and includes a motion compensation network (90...) coupled to a frame memory (60) to produce finally decoded pixel data for display. The decompressed MPEG data is recompressed by plural parallel recompressors (40, 42) prior to storage in frame memory. Each recompressor receives a datastream of interleaved pixel data (24, 27; Fig. 5), and predicts and compresses interleaved pixel values (a, c) during each clock cycle, respectively (Fig. 20, 27). One of the recompressors (42) is de-energized in a reduced data processing mode when pixel data is subsampled (36, 38) prior to recompression. Subsampled data is re-ordered (43) prior to recompression. Multiple parallel decompressors (80, 82, 84) coupled to the frame memory provide pixel data to the motion processing network. A control unit (356, 360, 364, Fig. 23) insures an uninterrupted interleaved data flow to the decompressors by repeating last valid data when source data is interrupted.
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公开(公告)号：EP0885524A1
公开(公告)日：1998-12-23
申请号：EP97916205.0
申请日：1997-03-06
IPC分类号： H04N5
CPC分类号： H04N5/45
摘要： Apparatus for displaying a combined image of an auxiliary image and a main image includes a source of a main image signal and a source of samples representing an auxiliary image signal. A quincunx subsampler is coupled to the auxiliary image sample source. A signal combiner is coupled to the main image signal source and the quincunx subsampler. The sample combiner combines the main image signal and a signal representing the quincunx subsampled samples to generate a signal representing a combined image of the main and auxiliary images.
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公开(公告)号：EP0748559A1
公开(公告)日：1996-12-18
申请号：EP94905930.0
申请日：1993-12-13
CPC分类号： H04N3/2335 , H01J29/76 , H04N7/012
摘要： A television display system employing edge brightness flicker reduction by modulation of the vertical deflection signal has digital control words for modulation polarity (D) and magnitude (S). These digital words are coupled to an amplifier (900) and converted to a bipolar analog signal (Bp). The bipolar analog signal (Bp) comprises values in a first and second range. Signals in the first range produce vertical deflection modulation in a first direction and signals in the second range produce vertical deflection modulation in the opposite direction.
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9.发明公开
公开(公告)号：EP0885522A1
公开(公告)日：1998-12-23
申请号：EP97916203.0
申请日：1997-03-06
IPC分类号： H04N5
CPC分类号： H04N5/45
摘要： Apparatus for combining an auxiliary image and a main image includes a source of a main image signal and a source of samples representing an auxiliary image signal. A subsampler selectively subsamples the auxiliary image samples in either a quincunx subsampling pattern or a rectangular subsampling pattern. A signal combiner combines the main image signal and a signal representing the subsampled auxiliary image samples to generate a combined image signal. A control circuit generates a freeze control signal for the subsampler which conditions it to take samples in the rectangular subsampling pattern during a freeze frame operation, and in the quincunx sampling pattern otherwise.
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公开(公告)号：EP0744102A1
公开(公告)日：1996-11-27
申请号：EP95908251.0
申请日：1995-02-02
发明人： GAGNOT, Dominique , AMSTOUTZ, Marc , DIEHL, Eric
CPC分类号： H04B10/50
摘要： It is an object of the present invention to drive a radiation emitting device, such as a LED, optimally in dependence on the value of a carrier frequency of a signal to be transmitted. According to the present invention the value of a current which is provided to the radiation emitting element is controlled in dependence on the value of the carrier frequency. Using a LED, the current value is increased with decreasing duration of current flow. The invention can be used e.g. for remote commanders suitable for controlling two or more devices.
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