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| Number | Title | Issue Date |
| 7817726 | System and method for automatic filter generation using sampled SINC function with windowed smoothing Methods and systems for processing a plurality of pixels, in a video system, are disclosed. Aspects of the method may comprise acquiring scaling factors associated with a plurality of output pixels and generating filter coefficients during the generation of the outp... | 10/19/2010 |
| 7145936 | Bandpass delta sigma truncator and method of truncating a multi-bit digital signal A bandpass delta sigma truncator receives a series of first multi-bit digital signals each having a number of data bits, a first number of sign bits and sign extending means for sign extending each of the first multi-bit digital signals to a second multi-bit digital... | 12/05/2006 |
| 7006566 | Two stage equalizer for trellis coded systems For use in a receiver capable of decoding trellis encoded signals, there is disclosed an apparatus and method for reducing error propagation in a two stage decision feedback equalizer. The apparatus of the invention comprises a first stage equalizer comprising a fir... | 02/28/2006 |
| 6956842 | Multiplexing method and multiplexing device, and data signal transmission method and data signal transmission device An effective data multiplexing method wherein an error correction ability is exerted at the maximum so that data transmission quality is improved and a data transmitting method in which an interleaving process applicable to data transmission using interpolation pilo... | 10/18/2005 |
| 6944120 | Method and system for tiered digital television terrestrial broadcasting services using multi-bit-stream frequency interleaved OFDM The invention relates to a method and system for tiered digital broadcasting. A plurality of different bit streams representing digital data targeted for different services is received from a data source. Each bit-stream of the plurality of different bit-streams is ... | 09/13/2005 |
| 6476735 | Method of encoding bits using a plurality of frequencies A digital encoding system for encoding a series of input bits into a plurality of frequencies, includes an encoder for generating a sampled representation of the frequencies corresponding to an input data sequence comprised of bits, and a decoder. The dec... | 11/05/2002 |
| 6288657 | Encoding apparatus and method, decoding apparatus and method, and distribution media The subtracter performs subtraction processing between a pointer outputted from the pointer register and code words candidate outputted from the code word count storing circuit, and in accordance with whether the result is negative or positive, determines... | 09/11/2001 |
| 5963582 | Mitigation of multipath effects in global positioning system receivers A technique for minimizing or eliminating the effect of multipath signals in a receiver processing pseudorandom (PRN) code signals, such as in a global positioning system (GPS) receiver. The presence of multipath signals adversely affects both code measur... | 10/05/1999 |
| 5815530 | Data converters for sound equipment A delta modulation type data converter is adapted to carry out signal processing by sequentially comparing in cycles an inputted signal with a reference voltage set according to the results of previous comparisons and includes a plurality of current sourc... | 09/29/1998 |
| 5799033 | Method of error protected transmission, method of error protected reception of data and transmission system for transmission of data Data is transmitted via a signal containing a number of simultaneously active modulated frequency channels. The data is encoded in an error protecting code. Successive data items are mapped pseudo-randomly to different frequency channels. This protects ag... | 08/25/1998 |
| 5557635 | Voice encode/decode subsystem in a system for acquisition of test data using pulse code modulation The encode and decode subsystems use a continuously variable slope delta-modulation (CVSD) approach, with either parallel or serial data transfers. To allow for synchronization with a stable data transfer, the entire subsystem uses the main acquisition sy... | 09/17/1996 |
| 5533052 | Adaptive predictive coding with transform domain quantization based on block size adaptation, backward adaptive power gain control, split bit-allocation and zero input response compensation A codec uses a number of different signal processing techniques to improve audio compression. These techniques include (1) dynamically varying the size of the processing block to match the duration of the signal over which the audio signal can be consider... | 07/02/1996 |
| 5459714 | Enhanced port activity monitor for an integrated multiport repeater A system is provided on an Integrated Multiport Repeater (IMR) to monitor the activity of the IMR when the repeater is in minimum mode. Through this system the serial output pin outputs status based upon inputs at two input pin the signal in and the clock... | 10/17/1995 |
| 5448543 | Apparatus for reproducing data from a regenerative signal using a PLH circuit having loop gain control A PLL circuit produces a synchronous signal by utilizing a regenerative clock signal in a VFO portion in a regenerative signal which was read out from a recording medium in sections. When a defective portion is present in a regenerative clock signal, the ... | 09/05/1995 |
| 4783792 | Apparatus for transmitting digital signal The invention is concerned with an apparatus in which one of a large number of previously provided prediction filters (4) is selected and digital signal is transmitted through the selected prediction filters (4). In order to select one of the prediction f... | 11/08/1988 |
| 4581746 | Technique for insertion of digital data bursts into an adaptively encoded information bit stream The present invention relates to a transmitter and a receiver for use in a digital communication system which are capable of transmitting and receiving, respectively, a single duplex analog signal channel, such as, for example, a voice channel, and limite... | 04/08/1986 |
| 4538234 | Adaptive predictive processing system An adaptive predictive coding (APC) and adaptive kit allocation (ABA) system which splits a speech signal into a plurality of bands, subjecting each signal to adaptive predictive coding and adaptively changes quantization characteristics in the adaptive p... | 08/27/1985 |
| 4491953 | Dual mode coding A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an alotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes... | 01/01/1985 |
| 4394774 | Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback A digital video compression and expansion system and its methods for compressing and expanding digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The system compressor receives digitalized video frames divided ... | 07/19/1983 |
| 4369463 | Gray scale image data compression with code words a function of image history The present invention relates to a method and apparatus for compacting gray-scale image data which maintains extremely good picture quality and can result in typical images in a compression ratio of 5 to 1 and even better if a final step of arithmetic cod... | 01/18/1983 |
| 4302775 | Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback A digital video compression system and its methods for compressing digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The system compressor receives digitalized video frames divided into subframes, performs in ... | 11/24/1981 |
| 4272648 | Gain control apparatus for digital telephone line circuits There is disclosed a digital gain control particularly adapted for use with digital signals propagating in a telephone line circuit. The gain control is positioned in the circuit to respond to a digital signal manifesting a plurality of words, each having... | 06/09/1981 |
| 4097697 | Digital signal performance monitor A performance monitor for determining the error density of a digitally transmitted signal in which the magnitude of a d-c offset voltage applied to one regenerator is controlled in a feedback loop so as to maintain a constant error rate between the output... | 06/27/1978 |
| 4077053 | Television signal encoder utilizing a correlation between frames A television signal encoder uses correlation between frames for data compression or reduction in redundancy of information to be transmitted. The coding error occurring in the interframe coding process is effectively corrected by low-bit intraframe coding... | 02/28/1978 |
| 4075655 | Composite feedback predictive code communication system for a color TV signal including a carrier chrominance signal Responsive to signal samples of a color television signal including a carrier chrominance signal, a predictive encoder produces quantized prediction error signals in compliance with a first transfer characteristic (1 - P1)(1 - P2), w... | 02/21/1978 |
| 4051530 | Frame-to-frame coding system An input video signal is fed to a substracter wherein a difference is taken between the input and the output from a frame memory to provide a difference signal, the magnitude of which is controlled by a magnitude adjuster. The controlled output is then fe... | 09/27/1977 |
| 4044306 | Digital converter from pulse code modulation to continuous variable slope delta modulation A digital converter for digitally converting a coded signal being at a PCM rate into another coded signal flowing at a delta rate. First, the code of the PCM signal is converted into an intermediate code, this intermediate code being at a rate correspondi... | 08/23/1977 |
| 4005411 | Compression of gray scale imagery to less than one bit per picture element In a continuous tone image approximated by a two-dimensional array of gray scale coded points, more than one bit per picture element is required. Compression coding consists firstly of delta coding sequences representative of the successive scan lines of ... | 01/25/1977 |
| 3971987 | Gain method and apparatus for a delta modulator In a delta modulator a sequence of code symbols are generated which are indicative of increments of signal level, with each code symbol being determined in accordance with the difference in signal level between an input signal and a prediction signal whic... | 07/27/1976 |
| 3949299 | Signal coding for telephone communication system A telephone communication system reversibly converts input signals into adaptive delta modulated (hereafter ADM) signals and then into pulse code modulated signals. In one embodiment, an encoder of a telephone communication system receives analog signals,... | 04/06/1976 |
| 3937871 | Code communication A method and apparatus for code communication is disclosed in order to achieve band-width compression. Successive portions of information are derived and the next portion of information is predicted from at least one preceding portion, an error signal is ... | 02/10/1976 |
