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1. 发明授权

EP0840485B1 Method and circuit for the synchronization of an OFDM receiver 失效
标题翻译：方法和电路装置用于同步OFDM接收机
公开(公告)号：EP0840485B1
公开(公告)日：2000-09-06
申请号：EP97420183.2
申请日：1997-10-03
申请人： DISCOVISION ASSOCIATES
发明人： Davies, David Huw , Parker, Jonathan , Claydon, Anthony Peter John
IPC分类号： H04L27/26
CPC分类号： H04L1/0047 , H04L1/0071 , H04L25/0214 , H04L25/0232 , H04L27/265 , H04L27/2662 , H04L27/2676

2. 发明公开

EP0891099A2 Video decompression 失效
公开(公告)号：EP0891099A2
公开(公告)日：1999-01-13
申请号：EP98202248.5
申请日：1995-07-28
申请人： Discovision Associates
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/26
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： A method for operating a state machine, comprising the steps of :

providing an arithmetic core having a data stream flowing therethrough ;
providing a memory linked to said arithmetic core and installing a plurality of microcode instructions in said memory ;
controlling the operation of the arithmetic core according to the microcode instructions to modify the data stream ;
addressing the memory to select said microcode instructions for execution thereof by providing an address word having a predetermined fixed number of bits ;
defining the fixed width word with an address field and a substitution field ;
defining the address field with a plurality of bits defining the address of the data ;
defining a variable width substitution field with at least one substitution bit ;
the substitution field having at least one bit to serve as a termination marker between the address field and the substitution field ;
using the substitution field to indicate substituted bits from a separate addressing source ; and
maintaining the fixed width word while inversely varying the width of the address field and the width of the substitution field.

3. 发明公开

EP0891095A2 Video decompression 失效
标题翻译：视频解压
公开(公告)号：EP0891095A2
公开(公告)日：1999-01-13
申请号：EP98202244.4
申请日：1995-07-28
申请人： Discovision Associates
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/26
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： An apparatus for synchronizing time in a multiplexed data stream, comprising :

a token source, producing a time-multiplexed stream of tokens, wherein said tokens each comprise a plurality of data words, said data words each including an extension bit which indicates a presence of additional words in said token ;
a demultiplexer, accepting a stream of multiplexed data, and outputting a plurality of elementary streams of data, each said elementary stream comprising a series of access units and having a series of time stamps associated therewith ;
a first circuit connected to said demultiplexer comprising a first counter ;
a second circuit connected to said demultiplexer comprising a second counter ;
a third circuit coupled to said first counter and said second counters for initialization of a system time therein, wherein said third circuit is responsive to a SYNC_TIME token generated in said token source ;
wherein said first counter counts independently of said second counter for maintaining first and second local versions of said system time in said first circuit and said second circuit.

4. 发明授权

EP0877516B1 Signal Processing System 失效
标题翻译：信号处理系统
公开(公告)号：EP0877516B1
公开(公告)日：2001-05-23
申请号：EP98202129.7
申请日：1996-03-19
申请人： Discovision Associates
发明人： Claydon, Anthony Peter John , Gammack, Richard John
IPC分类号： H04L27/233 , H04L27/38
CPC分类号： H04L7/0029 , H04L1/0054 , H04L1/0057 , H04L1/0065 , H04L1/0068 , H04L7/0334 , H04L7/0335 , H04L27/3872 , H04L2027/0028 , H04L2027/0057 , H04L2027/0067 , H04N21/2383 , H04N21/4382

5. 发明公开

EP0877514A2 Matched filter 失效
标题翻译：调整的信号滤波
公开(公告)号：EP0877514A2
公开(公告)日：1998-11-11
申请号：EP98202131.3
申请日：1996-03-19
申请人： Discovision Associates
发明人： Claydon, Anthony Peter John , MacFarlane, Charles D. , Gammack, Richard John , Jones, Anthony M. , Robbins, William P. , Barnes, Mark Michael
IPC分类号： H04L25/03
CPC分类号： H04L1/0057 , H03K5/24 , H03M13/15 , H03M13/151 , H03M13/2707 , H03M13/2764 , H04L1/0045 , H04L1/0071 , H04L7/0334 , H04L25/03038 , H04L25/03866 , H04L25/062 , H04L27/02 , H04L27/2273 , H04L27/3809 , H04L2027/0032 , H04L2027/0061 , H04L2027/0067 , H04L2027/0073 , H04L2027/0081 , H04N5/211 , H04N5/4401 , H04N5/4446 , H04N5/455 , H04N5/52
摘要： Apparatus for processing a train of signal pulses having even-numbered and odd-numbered pulses, comprising :

a pulse shaping Nyquist filter having a plurality of even-numbered taps and a plurality of odd-numbered taps ;
a frequency down converter coupled to said filter, and operative on said signal pulses;
a circuit incorporated in said Nyquist filter for removing a portion of said signal pulses ;
This apparatus further comprises :
a stream-splitting circuit for connecting the even-numbered pulses to said even-numbered taps, and for connecting the odd-numbered pulses to said odd numbered taps ;
a plurality of first multipliers for multiplying said even-numbered pulses by a first set of coefficients ;
a plurality of second multipliers for multiplying said odd-numbered pulses by a second set of coefficients ; and
a plurality of adding circuits, each connected to an output of a said first multiplier and an output of a said second multiplier.

6. 发明公开

EP0748056A3 An error detection and correction system for a stream of encoded data 失效
标题翻译：用于编码数据流错误检测和纠正的方法
公开(公告)号：EP0748056A3
公开(公告)日：1997-07-02
申请号：EP96304168.6
申请日：1996-06-06
申请人： DISCOVISION ASSOCIATES
发明人： Claydon, Anthony Peter John , Thomas, Richard James , Gammack, Richard John , Foxcroft, Thomas , Robbins, William Philip , Kuligowski, Andrew Peter , MacFarlane, Charles Dunlop
IPC分类号： H03M13/00
CPC分类号： H04L1/0065 , H03M13/23 , H03M13/41 , H03M13/4169 , H03M13/6362 , H03M13/6502 , H04L1/0009 , H04L1/0054 , H04L1/0068 , H04L1/0071
摘要： The invention provides a decoder of symbols of received data, the data being encoded according to a convolutional encoding scheme and transmitted through a communications channel. The data is punctuated according to a puncturing matrix, and has a plurality of state values which describe a sequence of state transitions. The decoder has a generation unit that accepts the received data for calculating metrics of the transitions thereof. A selector responsive to the generation unit selects a path of transitions corresponding to the path produced by a transmitter of the data stream. A traceback unit maintains historical information representative of sequential decision operations of the selector. A counter is provided for counting illegal state transitions of the path selected by the selector, and a control unit, responsive to the counter, determines a puncture rate and adjusts a puncture phase of the received data. The decoder can be used in a VLSl receiver circuit which is adapted to the reception of QPSK modulated data.

7. 发明公开

EP0695095A2 Video decompression 失效
标题翻译： Videodekomprimierung
公开(公告)号：EP0695095A2
公开(公告)日：1996-01-31
申请号：EP95305308.9
申请日：1995-07-28
申请人： DISCOVISION ASSOCIATES
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： An MPEG video decompression method and apparatus utilizing a plurality of stages interconnected by a two-wire interface arranged as a pipeline processing machine. Control tokens and DATA Tokens pass over the single two-wire interface for carrying both control and data in token format. A token decode circuit is positioned in certain of the stages for recognizing certain of the tokens as control tokens pertinent to that stage and for passing unrecognized control tokens along the pipeline. Reconfiguration processing circuits are positioned in selected stages and are responsive to a recognized control token for reconfiguring such stage to handle an identified DATA Token. A wide variety of unique supporting subsystem circuitry and processing techniques are disclosed for implementing the system, including memory addressing, transforming data using a common processing block, time synchronization, asynchronous swing buffering, storing of video information, a parallel Huffman decoder, and the like.
摘要翻译：一种MPEG视频解压缩方法和装置，利用通过布置为流水线处理机的两线接口互连的多个级。控制令牌和数据令牌通过单个双线接口，以承载格式携带控制和数据。令牌解码电路位于某些阶段中，用于将某些令牌识别为与该级相关的控制令牌，并沿着管道传递未被识别的控制令牌。重新配置处理电路定位在选定的阶段，并且响应于识别的控制令牌，以重新配置这样的阶段来处理所识别的数据令牌。公开了各种独特的支持子系统电路和处理技术，用于实现系统，包括存储器寻址，使用公共处理块变换数据，时间同步，异步摆动缓冲，存储视频信息，并行霍夫曼解码器等。

8. 发明公开

EP0892556A3 Video decompression 失效
标题翻译：视频解压
公开(公告)号：EP0892556A3
公开(公告)日：2000-01-12
申请号：EP98202242.8
申请日：1995-07-28
申请人： Discovision Associates
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/24 , G06F13/00 , G06F9/38
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： A pipelined video decoder system having an input, an output and a plurality of processing stages therebetween, comprising : a universal adaptation unit in the form of a first interactive interfacing token for control and/or data functions among said processing stages ; a token generator, responsive to a picture start code in an input stream of encoded data for generating said first interactive interfacing token, wherein said first interactive interfacing token is serially transmitted through said processing stages ; wherein said first interactive interfacing token is a GROUP_START token for indicating a start of a group sequence; and upon generation of said GROUP_START token, said token generator generates a second interactive metamorphic interfacing token comprising a PICTURE_END token, said PICTURE_END token being serially transmitted to said processing stages before data associated with said start code is output, wherein responsive to said PICTURE_END token one of said processing stages stops processing a current picture in a first mode of operation, and said one processing stage generates a FLUSH token in a second mode of operation, wherein processing of said current picture is completed in a controlled manner.
摘要翻译：一种流水线视频解码器系统，其具有输入，输出以及其间的多个处理级，包括：通用适配单元，其形式为用于所述处理级之间的控制和/或数据功能的第一交互式接口令牌; 令牌发生器，响应于编码数据的输入流中的图片开始代码，用于产生所述第一交互式接口令牌，其中所述第一交互式接口令牌通过所述处理级被串行地发送; 其中所述第一交互式接口令牌是用于指示组序列的开始的GROUP_START令牌; 并且在产生所述GROUP_START标记时，所述标记生成器生成包括PICTURE_END标记的第二交互变形接口标记，所述PICTURE_END标记在与所述开始代码相关联的数据被输出之前被串行地传输到所述处理阶段，其中响应于所述PICTURE_END标记一个所述处理阶段在第一操作模式下停止处理当前画面，并且所述一个处理阶段在第二操作模式中生成FLUSH令牌，其中以受控方式完成所述当前画面的处理。

9. 发明公开

EP0891096A3 Video decompression 失效
公开(公告)号：EP0891096A3
公开(公告)日：2000-01-12
申请号：EP98202245.1
申请日：1995-07-28
申请人： Discovision Associates
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/24 , G06F13/00 , G06F9/38
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： A pipelined video decoder system having an input, an output and a plurality of processing stages therebetween, and receiving an input stream of encoded data comprising : a token generator, responsive to a picture start code and to extension start code identifiers and user data in the input stream for generating a universal adaptation unit in the form of an interactive interfacing token for control and/or data functions among said processing stages, wherein said interactive interfacing token is serially transmitted through said processing stages ; wherein a discard_user configuration bit is included in a data packet of the input stream; and a discard_extn bit is included in the [in] data packet; wherein responsive to a first condition of said discard_extn bit the token generator disregards the extension start code identifier, and responsive to a second condition of said discard_extn bit the extension start code identifier is replaced with another extension data token; whereby extension and user data are selectively specified for the user by the processing system.

10. 发明公开

EP0891095A3 Video decompression 失效
标题翻译：视频解压
公开(公告)号：EP0891095A3
公开(公告)日：2000-01-12
申请号：EP98202244.4
申请日：1995-07-28
申请人： Discovision Associates
发明人： Smith, Colin , Finch, Helen Rosemary , Claydon, Anthony Peter John
IPC分类号： H04N7/26
CPC分类号： H04N21/4307 , G06F12/0207 , G06F12/04 , G06F13/16 , G06F13/28 , H04N19/13 , H04N19/42 , H04N19/423 , H04N19/61 , H04N19/91 , H04N21/4305 , H04N21/44004
摘要： An apparatus for synchronizing time in a multiplexed data stream, comprising : a token source, producing a time-multiplexed stream of tokens, wherein said tokens each comprise a plurality of data words, said data words each including an extension bit which indicates a presence of additional words in said token ; a demultiplexer, accepting a stream of multiplexed data, and outputting a plurality of elementary streams of data, each said elementary stream comprising a series of access units and having a series of time stamps associated therewith ; a first circuit connected to said demultiplexer comprising a first counter ; a second circuit connected to said demultiplexer comprising a second counter ; a third circuit coupled to said first counter and said second counters for initialization of a system time therein, wherein said third circuit is responsive to a SYNC_TIME token generated in said token source ; wherein said first counter counts independently of said second counter for maintaining first and second local versions of said system time in said first circuit and said second circuit.
摘要翻译：一种用于同步多路复用数据流中的时间的设备，包括：令牌源，产生时间多路复用的令牌流，其中所述令牌每个包括多个数据字，所述数据字每个包括扩展位，该扩展位指示存在所述令牌中的附加词语; 解复用器，接收多路复用数据流，并输出多个基本数据流，每个所述基本流包括一系列访问单元并具有与其相关的一系列时间戳; 连接到所述解复用器的第一电路包括第一计数器; 连接到所述解复用器的第二电路包括第二计数器; 耦合到所述第一计数器和所述第二计数器用于其中的系统时间的初始化的第三电路，其中所述第三电路响应于在所述令牌源中产生的SYNC_TIME令牌; 其中所述第一计数器独立于所述第二计数器进行计数，用于在所述第一电路和所述第二电路中保持所述系统时间的第一和第二局部版本。

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