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| Number | Title | Issue Date |
| 6445423 | Controlled oscillator in a digital symbol timing recovery network A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information includes an input analog-to-digital converter (19) for producing a digital datastream. A symbol timing recovery and segment sync recov... | 09/03/2002 |
| 6266380 | Network for eliminating DC offset in a received HDTV signal A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information and a pilot component includes an input analog-to-digital converter (19) for producing a datastream which is oversampled at twice the ... | 07/24/2001 |
| 6233295 | Segment sync recovery network for an HDTV receiver A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information and a pilot component includes an input analog-to-digital converter (19) for producing a datastream which is oversampled at twice the ... | 05/15/2001 |
| 6229464 | Pulse code modulated to DC centered VSB converter A digital VSB modulator includes a modulator to which an ongoing sampled data stream of 1-sample-per-symbol successive PCM symbol signal samples are applied as a modulating signal. A sampled carrier stream, occurring at the rate of the signal samples, is ... | 05/08/2001 |
| 6229925 | Pre-processing device for MPEG 2 coding The invention relates to a device for pre-processing video images intended to be coded in the MPEG 2 format. The MPEG 2 standard provides that, mode which exploits the spatial redundancy of the images. The images thus coded then define a succession of gro... | 05/08/2001 |
| 6148107 | Quantization process for video encoding A block based signal compression system, as for example for coding video signal, and employing quantization of codewords or transform coefficients includes circuitry for adaptively controlling the quantization. Adaptivity of quantization is made a functio... | 11/14/2000 |
| 6118487 | Method and circuit arrangement for the memory-optimized processing of a composite video baseband signal CVBS signal For compatible transmission of a television picture having an aspect ratio of 16:9 within a 4:3 system, transmission is effected in the letterbox format in accordance with the PALplus system specification. The receiver reconstructs the original picture wi... | 09/12/2000 |
| 6100718 | Circuit for transmitting digital signals A circuit, for processing high frequency digital signals minimizes radiation interference by reducing voltage swings at the circuit input. This is accomplished by forming circuit input structures, which exhibit very low input impedances. An example of suc... | 08/08/2000 |
| 6088327 | Method and circuit arrangement for improving carrier separation for the transmission of OFDM signals In the case of the OFDM method, a large number of modulated carriers are transmitted using frequency division multiplexing, a spectrum having a virtually rectangular shape being produced as a result of the large number of carriers. In order to separate th... | 07/11/2000 |
| 6081650 | Transport processor interface and video recorder/playback apparatus in a field structured datastream suitable for conveying television information A transmitted high definition television signal is represented by a packetized datastream configured as a sequence of data fields (FIG. 1) with a non-uniform data rate due to unequal inter-data overhead information intervals. Each data field is prefaced b... | 06/27/2000 |
| 6057891 | Method and apparatus for calibrating an analog to digital converter A process for correcting the input-output correspondence of an analog-to-digital converter includes calculating the equation of the actual input-output correspondence, for known input values, during programmed conversion suspension periods. A comparison w... | 05/02/2000 |
| 6055270 | Multiplexer system using constant bit rate encoders A multiplexer system includes a multiplexer (20) having plural inputs (1-K) and an output (15); plural channel processors (10) each having a control input, a data input for receiving an input signal, a complexity output for providing a signal representing... | 04/25/2000 |
| 6041079 | Field/frame conversion of DCT domain mixed field/frame mode macroblocks using 1-dimensional DCT/IDCT A field/frame conversion method for compressed digital video, especially MPEG type video, having mixed field/frame mode macroblocks in the DCT domain utilizes a 1-D IDCT/DCT approach rather than the conventional 2-D IDCT/DCT approach. A vertical 1-D IDCT ... | 03/21/2000 |
| 6028639 | Process and apparatus for converting an MPEG-2 bitstream into SMPTE-259 compatible bitstream A process and apparatus for converting an MPEG-2 bitstream into an SMPTE-259 compatible bitstream is characterized by a frame rate converter which is selectively enabled to drop every 1001st frame of the incoming MPEG-2 bitstream depending on the input bi... | 02/22/2000 |
| 5987073 | Symbol timing recovery network for a carrierless amplitude phase (CAP) signal A symbol timing recovery (STR) error detector includes a complex multiplier and a Gardner-type symbol timing error estimator for operation with carrierless amplitude phase (CAP) signals. Quadrature Ir and Qr signals from the system are input to the comple... | 11/16/1999 |
| 5970397 | Method for the frequency correction of multicarrier signals and related apparatus Various methods for terrestrial transmission of digital broadcast signals as DVB, HDTV-T and DAB signals are known. One of these methods is the OFDM method, where the transmitted signal includes a multiplicity of modulated carriers. These carriers are sep... | 10/19/1999 |
| 5966412 | Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal Apparatus and method for receiving a QAM signal using a backward compatible hierarchical coding scheme to increase data transmission using finer constellations, while maintaining compatibility with existing Direct Broadcasting Satellite (DBS) systems. The... | 10/12/1999 |
| 5943369 | Timing recovery system for a digital signal processor A timing recovery system for a digital signal receiver receives a signal, representing successive symbols, from a transmitter. The symbols are subject to exhibiting multiple symbol rates. The system derives a sample enable signal from the received input s... | 08/24/1999 |
| 5933451 | Complexity determining apparatus Apparatus for determining a complexity measure of a data signal is disclosed which includes an encoder, having an input terminal responsive to a data input signal and a data output terminal producing a coded output signal representing the data input signa... | 08/03/1999 |
| 5933450 | Complexity determining apparatus A complexity determining apparatus is disclosed which comprises a source of a data signal and a subsampler system, coupled to the data signal source, for producing a subsampled signal representing the data signal. A variable bit rate (VBR) encoder is resp... | 08/03/1999 |
| 5930309 | Receiver signal processing system for cap signals A CAP signal is processed by a QAM demodulator network. The QAM network causes the CAP signal to rotate about its center frequency, which rotation is removed prior to conveying the CAP signal to utilization networks. In an analog implementation, the CAP s... | 07/27/1999 |
| 5923626 | Recording or playback devices for optical information carriers having a different track width The present invention to provides for information carriers of different storage densities, a recording and/or playback device which is compatible or can be used for different optical information carriers despite a functional relationship which to be satis... | 07/13/1999 |
| 5914924 | Reproducing or recording device for reproducing, or recording on, an optical recording medium A reproducing and/or recording device for reproducing, or for recording on, an optical recording medium, having a tracking sychronization circuit (1), which has a variable center frequency generator (12, 13). The tracking synchronization circuit (1) can b... | 06/22/1999 |
| 5915090 | Apparatus for transmitting a distributed computing application on a broadcast television system A distributed computer system is disclosed which comprises a source of a continuous data stream repetitively including data representing a distributed computing application and a client computer, receiving the data stream, for extracting the distributed c... | 06/22/1999 |
| 5912907 | Satellite receiver code rate switching apparatus A satellite signal receiver includes an input demodulator followed by a Viterbi decoder and a Reed-Solomon decoder. A received signal is encoded with information including error-representative information, and exhibits an error correction code rate which ... | 06/15/1999 |
| 5905708 | Focusing two polarized beams onto different information carrier layers of a single optical disc A device for reading from or writing to an optical recording medium is disclosed which has at least two information carrier layers spaced apart from one another, as well as a light source, an optical unit and a detection unit. The device permits a plurali... | 05/18/1999 |
| 5903324 | Transport processor interface for a digital television system A transmitted high definition television signal is represented by a packetized datastream configured as a sequence of data fields with a non-uniform data rate due to different types of different duration non-data overhead information. Each data field is p... | 05/11/1999 |
| 5894334 | Carrier recovery system for a vestigial sideband signal A television signal receiver for processing an HDTV signal transmitted in a vestigial sideband (VSB) format includes input complex filters shared by a timing recovery network (30) and a carrier recovery network (50). The filter network includes a pair of ... | 04/13/1999 |
| 5889561 | Method and apparatus for scaling a compressed video bitstream A method and apparatus for scaling the bitstream of a compressed video signal includes partial decoding hardware (38, 41) to permit excising of higher frequency AC DCT coefficients or re-quantizing quantized data with a coarser quantization factor. The sc... | 03/30/1999 |
| 5877814 | Asynchronous control signal generating apparatus Apparatus for asynchronously generating control signals (CONTROL) is disclosed including a plurality of sources (5) of asynchronous data signals and a plurality of data processing channels (10, 14), each processing one of the data signals in response to a... | 03/02/1999 |
| 5878088 | Digital variable symbol timing recovery system for QAM A receiver is arranged for receiving a transmitted quadrature amplitude modulated (QAM) signal representing successive symbols, and including an in-phase (I) component and a quadrature (Q) component. In such a receiver, a timing recovery system includes a... | 03/02/1999 |
| 5867461 | Optical recording and reproducing apparatus with servo compensation for detected defects and external shocks An optical recording and/or playback system having tracking and focus regulating circuits. Mechanical shock and/or disc defects are detected and the adverse effects on the tracking and focus regulating circuits are reduced.... | 02/02/1999 |
| 5864583 | Parameter sampling apparatus Apparatus for sampling a signal parameter of a plurality of data signals is disclosed which comprises a plurality of sources (5) of data signals. Each data signal includes sequential groups of data. Each group of data in all of the data signals has the sa... | 01/26/1999 |
| 5864557 | Method and apparatus for opportunistically transferring data in a packet stream encoder A transport stream encoder comprises a plurality of component signal sources. One of the component signals sources is a source of an opportunistic data component signal carrying a block of data having a predetermined size to be transferred within a predet... | 01/26/1999 |
| 5847762 | MPEG system which decompresses and then recompresses MPEG video data before storing said recompressed MPEG video data into memory An MPEG compatible decoder receives encoded, compressed data in the form of image representative pixel blocks. The decoder includes a frame memory (20) for storing reconstructed pixel blocks incident to the decoding process. The previously decompressed da... | 12/08/1998 |
| 5847779 | Synchronizing a packetized digital datastream to an output processor in a television signal processing system A system of the present invention addresses the difficulty of aligning a reference sync byte at the beginning of a data packet during situations where the system experiences severe problems such as arbitrary resets/restarts or transmission disturbances. S... | 12/08/1998 |
| 5841953 | Method for compressing and decompressing data files A method is disclosed for decompressing in-place an adjusted monotone compressed file having a first portion containing compression codewords and a second portion containing plain text, into a decompressed file having a size and containing plain text. The... | 11/24/1998 |
| 5838686 | System for dynamically allocating a scarce resource A system for dynamically allocating a resource is disclosed which includes a plurality of resource users and a resource having a maximum utilization level sharable among the plurality of resource users. A plurality of need analyzers, associated with respe... | 11/17/1998 |
| 5835532 | Blind equalizer for a vestigial sideband signal A television signal receiver for processing an HDTV signal transmitted in a vestigial sideband (VSB) format with a one dimensional data constellation includes a first carrier recovery network (18), an equalizer (20), and a second carrier recovery network ... | 11/10/1998 |
| 5831690 | Apparatus for formatting a packetized digital datastream suitable for conveying television information A transmission processor (16) receives an input packetized datastream (FIGS. 6-9; FIGS. 15-18 signal A) containing packets of data bytes including MPEG coded video information. The transmission processor outputs a symbol datastream (FIGS. 15-18 signal F) ... | 11/03/1998 |
