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1. 发明授权

US5508940A Random access audio/video processor with multiple outputs 失效
公开(公告)号：US5508940A
公开(公告)日：1996-04-16
申请号：US196018
申请日：1994-02-14
申请人： David L. Rossmere , Robert S. Glenn, Jr. , William B. Brown , John B. Carlucci , Robert W. Duffy
发明人： David L. Rossmere , Robert S. Glenn, Jr. , William B. Brown , John B. Carlucci , Robert W. Duffy
IPC分类号： H04N5/262 , G11B27/031 , H04N5/76 , G06K15/00
CPC分类号： G11B27/031 , H04N5/262
摘要： A random access audio/video processor having multiple outputs is disclosed. The random access audio/video processor includes a main control unit having an analog video back panel, an analog audio back panel, an analog input/output (I/O) board. An audio processing board, a video processing board, a video effects board, a syncronization board, and a system board (containing the main CPU). The video processing board includes a compressor for compressing input video signals, and a triple transfer buffer, for intermediate storage of digital video path. The video processing board further includes decompression circuits coupled to each of two triple transfer buffers for decompressing compressed stored video, and providing the decompressed video channels to an effects board for the addition of special effects. The audio processing board contains four digital signal processors for audio compression, decompression, and effects processor. It also contains triple transfer buffers for intermediate storage of digital audio data. The system board contains the main CPU, DMA controllers and SCSI interfaces required to perform high speed audio-video data transfers to/from disk. The triple transfer buffers of the present invention include a present buffer, a past buffer and a future buffer, the purpose of which is to ensure that there is sufficient video and audio material in the present buffers to minimize any discontinuities in either the audio or the video channel outputs. The invention provides an E to C mode to allow the user to view video which has been compressed and decompressed to verify that no unwanted system artifacts exist or are being created by the compression process. The viewing of the compressed and decompressed material is done in real-time while the material is being compressed and stored. Under software control, a user may bypass the compression circuit and capture uncompressed still frames directly in the triple transfer buffer, and store the uncompressed still frames, thereby permitting the independent display of still and motion video in each respective output channel.

2. 发明授权

US5535137A Random access audio/video processor with compressed video resampling to allow higher bandwidth throughput 失效
公开(公告)号：US5535137A
公开(公告)日：1996-07-09
申请号：US196038
申请日：1994-02-14
申请人： David L. Rossmere , Robert S. Glenn, Jr. , William B. Brown , John B. Carlucci , Robert W. Duffy
发明人： David L. Rossmere , Robert S. Glenn, Jr. , William B. Brown , John B. Carlucci , Robert W. Duffy
IPC分类号： G06T3/00 , G11B20/10 , G11B27/032 , G11B27/034 , G11B27/34 , H04N5/262 , H04N5/91 , H04N9/74 , H04N1/46
CPC分类号： H04N5/262 , G11B27/032 , G11B27/034 , G11B27/34 , G11B2220/20 , G11B2220/90
摘要： A random access audio/video processor having multiple outputs is disclosed. The processor includes a main control unit with analog video and audio back panels, an analog input/output board, audio and video processing boards, video effects board, synchronization board, and a system board (containing the main CPU). The video processing board includes a compressor for compressing input video signals, and triple transfer buffers for intermediate storage of digital video path. The video processing board further includes decompression circuits coupled to each of two triple transfer buffers for decompressing compressed stored video, and providing the decompressed video channels to an effects board for the addition of special effects. The audio processing board contains processors for compression, decompression, and effects, as well as triple transfer buffers. The triple transfer buffers include present, past, and future buffers which jointly operate to minimize discontinuities in the output channels. The invention provides an E to C mode to allow the user to preview video which has been compressed and decompressed to verify that no unwanted system artifacts exist, or are created by the compression process. This previewing is done in real-time while the material is being compressed and stored. A user may also bypass the compression circuit and capture uncompressed still frames directly in the triple transfer buffer, and store the uncompressed still frames, thereby permitting the independent display of still and motion video in each output channel.

3. 发明授权

US06389070B1 Device for indicating the received signal quality in a digital television receiver 有权
标题翻译：用于在数字电视接收机中指示接收信号质量的装置
公开(公告)号：US06389070B1
公开(公告)日：2002-05-14
申请号：US09282322
申请日：1999-03-31
申请人： Aldo G. Cugnini , David L. Rossmere
发明人： Aldo G. Cugnini , David L. Rossmere
IPC分类号： H03H730
CPC分类号： H04N5/211 , H04N5/4401 , H04N17/004 , H04N21/4382 , H04N21/44209 , H04N21/4882
摘要： A device for indicating the quality of a received digital broadcast video signal in a digital television receiver includes circuitry for determining the amount of multipath interference. The device generates a display graph indicative of the signal quality. Optionally, the device may also consider, in determining the signal quality, whether a demodulator in the television receiver is able to lock onto a sync sequence in the video signal, whether an adaptive equalizer also in the television receiver is able to lock onto the sync sequence, and the amount of errors being corrected in an error correction circuit in the television receiver.
摘要翻译：用于在数字电视接收机中指示接收的数字广播视频信号的质量的装置包括用于确定多路径干扰量的电路。该装置产生指示信号质量的显示图。可选地，设备还可以在确定信号质量时考虑电视接收机中的解调器能否锁定视频信号中的同步序列，电视接收机中的自适应均衡器是否能够锁定到同步序列，以及在电视接收机中的纠错电路中纠正的错误量。

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