Matches 351 - 400 out of 437 < 1 2 3 4 5 6 7 8 9 >
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5384780 High speed modem, method and system for achieving synchronous data compression  
The present invention provides a novel scheme for automatically increasing data throughput in a communication system by having data compression with delay minimization done within a modem. A high...
5365545 MODEM-channel bank converter  
A converter (200) includes a transmit circuit that converts modem transmit samples at 9,600 samples/second into samples that may be transmitted by a T1 channel bank at 8,000 samples/second. The...
5357248 Sampling rate converter  
A sampling rate converter has a pulse-dulation modulator for converting a pulse-code-modulated signal, which has been sampled with a first sampling frequency, into a pulse-dulation-modulated...
5331346 Approximating sample rate conversion system  
A sample rate conversion system converts from an input sample rate stream having a predetermined input sample rate to an output sample stream having a predetermined output sample rate by...
5327125 Apparatus for and method of converting a sampling frequency according to a data driven type processing  
A sampling frequency converting apparatus includes an input port converting an input image data (X) into a data packet, a data driven engine executing interpolation on the data packet applied from...
5280503 Data communication system with data rate throttling  
Fractional rate modulation is accomplished by separating incoming data into frames of bits. Each frame in partitioned into bit words of unequal lengths. The words are divided by a modulus to obtain...
5274372 Sampling rate conversion using polyphase filters with interpolation  
A sampling rate converter for converting an input digital signal, such as D2 PAL, into an output digital signal, such as D1 PAL, has a pair of polyphase filters. The input digital signal is input...
5272524 Solid state camera apparatus with sample rate conversion to D1 and D2 formats  
A solid state camera apparatus converts image signals read from a solid state image-sensing device at a reading clock rate of a first frequency f CCD to digital video signals at the reading clock...
5251236 Fractional rate modem with trellis  
A data transmitting QAM modem with partitions incoming data into unequal frames. Some of the bits in each frame are encoded using fractional rate encoding and then recombined the rest of the bits...
5230010 Fractional rate modulation  
Fractional rate modulation is accomplished by separating incoming data into frames of bits. Each frame is partitioned into bit words of unequal lengths. The words are divided by a modulus to obtain...
5227787 Digital data converting system  
A system is provided for converting an input digital data sampled at a first sampling frequency to an output digital data to be sampled at a second sampling frequency. The input digital data is...
5204676 Circuit arrangement for frequency conversion of a digital signal  
A circuit arrangement for converting a digital signal of a first frequency into a signal of a second frequency and including an interpolator/decimator is characterized, notably for asynchronous...
5199046 First and second digital rate converter synchronization device and method  
A first and second digital rate converter device and method provides for synchronization between a first digital sample sequence and a second digital output sequence related to the first digital...
5170387 Apparatus for reading an information pattern from a record carrier and signal-processing circuit for use in such apparatus  
An information track on a record carrier (2) is read by a read head which includes detectors producing detection signals (IA, IB, IC and ID) which correspond to the information pattern on the...
5162795 Coding and decoding apparatus of variable length data  
An apparatus for encoding variable bit length data words into constant bit length data words concatenates the variable length data words supplied at a first data rate so as to output constant...
5159339 Sampling rate converter for signals having a non-integer sampling ratio  
In a sampling rate converter which converts a sampling frequency of digital signals sampled at a first sampling frequency into a second sampling frequency, output clocks corresponding to the second...
5159338 Sampling frequency conversion apparatus  
A sampling frequency conversion apparatus according to this invention converts an input data string based on an input sampling pulse into a data string based on an output sampling pulse having a...
5126737 Method for converting a digital signal into another digital signal having a different sampling frequency  
A conversion method converts a first digital signal having a first sampling period to a second digital signal having a second sampling period which is different from the first sampling period. The...
5124701 Quantization device with variable digital coding rate  
A quantization device with variable digital coding rate for coding and decoding sound and speech in telecommunications and frequency transform coding. For a signal of amplitude │x│ whose...
5119093 Apparatus for converting a signal of a first sample rate into a signal of a second sample rate  
Sample values of a digital signal of a first sample rate are supplied to a digital filter for conversion into a digital signal of a second sample rate. The coefficients of the digital filter are...
5111488 Doubling/dividing device for a series bit flow  
A device for doubling or dividing by 2 the flow rate of series bits comprising a succession of first one-bit registers (R4-R0) actuated at a frequency F; a second register (R) actuated at a...
5107264 Digital frequency multiplication and data serialization circuits  
A digital clock frequency multiplication and data serialization circuit for converting Q parallel data bits into a serial data stream is provided. A clock phase generator is coupled to receive the...
5103227 Modulus converter for fractional rate encoding  
Fractional rate modulation conversion is accomplished by separating incoming data into frames of bits. Each frame is partitioned into bit words of unequal bit lengths. The words are divided by a...
5101369 Digital filter capable of sample rate alteration  
A digital filter performs a predetermined arithmetic operation on input digital data inputted thereto in time-series manner by the predetermined first sampling period to thereby generate output...
5089819 Parallel-to-serial signal converting apparatus and image displaying system using the same  
A parallel-to-serial signal converting apparatus which comprises: a logic circuit for converting first parallel bit signals of a low frequency to be converted to a high frequency serial bit signal...
5081342 Universal digital code processor  
A universal digital code processor device (10) for the processing of scanner digital input data including bar code data is disclosed. The device is flexible and universal in nature in that it can...
5038365 Modem having a software-adapted modulation rate  
Modem receiving from/transmitting to a DTE data bits at a rate DR and adapted for operating at a modulation rate MR in an environment operating at a basic rate BR. In the receiving way, it...
5016010 System for controlling a number of bits required to represent coded output data  
An encoder encodes input data into codes and outputs the codes. The numbers of bits required to represent the codes which are outputted from the encoder during respective first predetermined...
5010507 Sampled digital filter system  
A sampled digital filter system for filtering a signal that has a frequency lower than an unwanted signal component in the input signal. The digital filter system samples the input signal in bursts...
4996528 Apparatus having shared modular architecture for decimation and interpolation  
An apparatus adaptable for use with an analog-digital-analog conversion device for effecting communications between an analog device and a digital device, the analog-digital-analog conversion...
4994801 Apparatus adaptable for use in effecting communications between an analog device and a digital device  
An apparatus adaptable for use in effecting communications between an analog device and a digital device, having an analog-digital-analog circuit for converting incoming analog signals received...
4985701 Time-division bit number conversion circuit  
A time-division bit number circuit that comprises a bit number expansion system and/or a bit number reduction system. The bit number expansion system converts an N bits signal to a 2N bits signal,...
4954824 Sample rate conversion system having interpolation function with phase locked clock  
A sample rate conversion circuit converts first digital data processed by a first clock signal having a first frequency into digital data processed by a second clock signal having a second...
4928290 Circuit for stable synchronization of asynchronous data  
A circuit for the stable synchronization of an asynchronous data signal. The circuit comprises a first latch for receiving a first asynchronous data signal, a first delayed system clock signal, and...
4903025 Signal path setting circuit  
A signal path setting circuit for a digital recorder comprising: a digital-to-analog converter hereinafter referred to as a D/A converter to convert a digital signal into an analog signal, a first...
4903019 Sampling frequency converter for converting a lower sampling frequency to a higher sampling frequency and a method therefor  
A converter converts time-sequential input digital data Q i having a sampling frequency f m to time-sequential digital data P j having a sampling frequency f n (f n :f m =n:m, n>m, n, m;...
4860313 Adaptive differential pulse code modulation (ADPCM) systems  
Apparatus and technique for ADPCM transmission of voiceband data at rates up to and including 9600 bits/s via an ADPCM system comprising an ADPCM transmitter receiving PCM encoded signals at an 8...
4841298 Bit pattern conversion system  
A bit pattern conversion system for converting a sequence of a bit pattern between a central processing unit and a peripheral circuit, including a data bus line connected between the central...
4837571 Circuit arrangement for converting a data signal  
The described circuit arrangement for converting a data signal having a constant bit rate and code words of different length into an output signal consisting of code words of constant length but...
4804959 Method and apparatus using multiple codes to increase storage capacity  
To increase storage capacity of a disk storage device, the recording surface of the device is partitioned into a plurality of concentric recording bands, data to be recorded on respective bands are...
4755794 Digital-to-digital code converter  
The present invention relates to a digital-to-digital code converter, or decimator, which implements sinc 3 processing. The input signal (X) to the code converter comprises a series of groups,...
4709227 Method and device for inserting a digital signal in a channel with higher flow rate  
A method and device for inserting a digital signal in a channel at a higher flow rate is provided, for example for transcribing from 704 Kbit/s into 2048 Kbit/s, wherein each binary element of the...
4630034 Sampling frequency converting apparatus  
A sampling frequency converting apparatus converts an input digital television signal which is sampled at a first frequency into an output digital signal which is sampled at a second frequency. The...
4612573 Method for clock rate conversion  
A method for clock rate conversion of digitized television signals for the acquisition of a television signal having a prescribed processing clock rate is provided wherein the digitized television...
4595907 PCM data translating apparatus  
An interface device for use between a North American PCM channel bank and a CCITT PCM channel bank which allows data to stay in digital format rather than being converted to voice frequency. The...
4553129 Data transmission by subrate grouping  
In a data transmission system, apparatus for converting a subrate binary data stream into a binary signal at the line transmission rate comprises means for periodically accepting a date byte from...
4536745 Sampling frequency conversion device  
An input digital signal with M(=5) samples/second is converted to an output signal with N(=6) samples/second with n(=9) quantization bits. The device comprises parallel shift registers each having...
4486740 DC Cancellation in ternary-coded data systems  
An encoder (100) for processing an input signal to produce a ternary coded data stream having supressed DC comprises circuitry, and its associated methodology, including an arrangement...
4481659 Apparatus and method of reducing the bit rate of PCM speech  
Bit rate in a PCM Companding system is reduced by transmitting sample magnitude (X n ) if the sample is near a zero-crossing, and transmitting the difference (D n ) between sequential samples if...
4464783 Speech coding method and device for implementing the improved method  
This improved speech signal Block Coded PCM (BCPCM) system reduces the number of bits allocated to transmitting the scale factor, thereby releasing bits for allocation to coding samples in the...
Matches 351 - 400 out of 437 < 1 2 3 4 5 6 7 8 9 >