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JP3292711B2 |
To improve voice quality of a reproduced voice with a low bit rate. Spectrum envelope amplitude 18 is obtained from spectrum envelope information in a decoder side, and a band where the value of the spectrum envelope amplitude becomes ma...
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JP3291948B2 |
PURPOSE: To obtain fine acoustic tone and to prevent tone from being deteriorated by using the information of rounding processing to be executed at the time of converting bit information having a decimal part calculated in each quantized...
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JP3294024B2 |
PURPOSE: To simplify the calculation of intensity estimating value and to reduce required operation time by forming the absolute value of an output signal from an inverse quantizer, attenuating higher frequency signal components and accu...
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JP3292613B2 |
PURPOSE: To improve the convenience of use by inserting an identification signal of a sender station to a start and an end of transmission so as to use the equipment in the same sense as that of a conventional telephone set without notif...
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JP3294017B2 |
PURPOSE: To reduce the failure and the costs of the digital generating method of a complex base band signal by multiplying each filtering-processed number by a coefficient obtained from the frequency shift of a polyphase filter before ad...
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JP3291532B2 |
To prevent propagation of an undesired correction disable flag by specifying an produced position of a code error in a variable length code. An error correction decoding means 12 applies error check and correction in the unit of a symbol...
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JP3291295B2 |
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JP2002165148A |
To implement a lower cost AV data transmission/reception system.A receive buffer monitor circuit 21 monitors the amount of data accumulated in a receive buffer 6, and when the amount of accumulated data exceeds a higher threshold, a rece...
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JP3287540B2 |
To deal with plural code transmission speeds and plural carrier wave frequencies of plural detection systems in small hardware scale. An automatically gain controlled digital received signal is converted 32 to a digital signal by A/D con...
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JP2002158619A |
To simply control a phase difference (time difference) between input data and output data, in the case of converting a sampling frequency.When sampling frequency is converted by the sampling frequency converter of this invention, the sam...
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JP2002158719A |
To provide a line quality monitor that attains a high-speed operation and detects an error with high accuracy.The line quality monitor is provided with a 1st comparator 15 that has a feedback circuit that compares a reception signal inte...
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JP2002156998A |
To provide a bit stream processing method for an audio signal which is adaptive to wide-range bit rates while evading the complexity of processing on a decoding side, a recording medium where the processing method is recorded, and a proc...
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JP3285920B2 |
In a car radio with a circuit arrangement for analog/digital conversion of an IF signal, a sigma-delta converter is timed with a clock frequency which is defined in such a way that an integral multiple and an adjacent half-integral multi...
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JP2002152698A |
To introduce a background signal to a signal transmitted through a communication system.The communicating system comprises a plurality of personal communication device. Each communication device way transmit and receive signals to from o...
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JP2002149196A |
To transmit voice encoding information having different sampling frequencies by the same repetition time.In a signal transmitting device, a data generating part generates a group of blocks comprising preceding and succeeding blocks conce...
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JP3282661B2 |
To simplify a processing and to continue a realtime reproduction of signals without interruption, in the case that the throughput is low by monitoring the processing condition of frequency component decoding and controlling a processing ...
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JP3283200B2 |
To convert the encoding rate of encoded data at high speed by converting and outputting output coded data obtained by control-outputting a parameter regulating the frame size of inputted voice coded data by a previously fixed procedure b...
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JP3282595B2 |
To reproduce a more natural synthesized voice by improving the analyzing accuracy of voice source information. An input voice signal band is bisected by a band-pass filter 3 and the residual signal extracted by an LPC inverse filter 6 by...
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JP2002135216A |
To distribute the effects of gap generation over an interleave period by determining the number of gap generation bits being used in interleave, even in an arrangement in which the rate matching is carried following to frame division aft...
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JP2002513515A |
Information can be communicated to or from an electronic device in accordance with a plurality of protocols to provide a plurality of services for the user. The apparatus can operate with any conventional modulation (analog or digital) a...
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JP2002512466A |
The invention relates to a method for converting the scanning rate during the transfer of a scanned signal from a first system (SYS 1) with a first scanning rate (f1) to a second system (SYS 2) with a second scanning rate (f2). According...
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JP3276969B2 |
PURPOSE: To reduce the size of the device by efficiently transmitting a speech signal by converting the signal into optimum codes. CONSTITUTION: The speech code book of an opposite communication party is loaded in a receiving code book m...
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JP3276356B2 |
To obtain a synthesized voice of higher quality by providing a diffusion pattern storage and selection part, a pulse diffusion part which convolutes a diffusion pattern selected by the selection part and a pulse vector, etc., and supplyi...
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JP3276355B2 |
To obtain a synthesized voice of higher quality by providing a diffusion pattern storage a selection part which selects one of stored diffusion patterns and a pulse vector diffusion part which convolutes the diffusion pattern selected by...
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JP3277705B2 |
PURPOSE: To attain efficient coding and decoding by including a part of one preceding or succeeding 2nd frame coding information or over consecutive or nonconsecutive timewise to a 1st frame to coding information of the 1st frame. CONSTI...
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JP3276358B2 |
To obtain a synthesized voice of higher quality by providing a pulse vector generation part which supplies pulse vectors, a diffusion pattern storage and selection part, a pulse vector diffusion part which convolutes diffusion patterns s...
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JP3275916B2 |
To provide a digital information receiver, that efficiently receives transmitted video information and audio information whose bits are compressed, corrects an error that has occurred during the transmission and decodes the video informa...
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JP3276353B2 |
To generate the shape of a sound source vector based upon an actual voice signal and a sound source vector in a shape of statistically high similarly by providing a pulse vector diffusion part, etc., which convolute a diffusion pattern a...
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JP3276354B2 |
To provide a sound source vector generating device generating a sound source vector having high similarity with a sound source vector by an actual voice signal to coding/decoding voice information efficiently. This sound source vector ge...
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JP3276357B2 |
To obtain a synthesized voice of higher quality by providing a pulse diffusion part, etc., which convolutes a diffusion pulse and a pulse vector, and selecting selecting a diffusion pattern by a diffusion pattern storage and selection pa...
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JP2002118517A |
To provide an apparatus and a method for transformation encoding wherein the delimiter of an overlap is decided arbitrarily and a signal can be reproduced completely by adding the overlap.A linear and nonlinear prediction analyzer 3 exec...
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JP3274644B2 |
To perform probabilistic trellis coding modulation that uses PCM lead-through constellation which accomplishes low errors and fast transmission on a remote communication network by including many signal point groups which have distance t...
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JP3275224B2 |
PURPOSE: To easily and efficiently execute the generation of array data by providing a means selecting the basic data group stored in a memory and generating array data. CONSTITUTION: The memory 3 of an array data generation circuit 2 st...
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JP3274655B2 |
To perform uneven error protection to bits of different classes to be encoded by dividing audio data bits into classes, based on the effects of errors of the data bits set on the perceptual quality of audio signals, which are reconfigure...
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JP2002111512A |
To avoid influence due to incorrect detection, when an error is detected by error detection decoding.A turbo decoder 6 compares a present data in repeated decoding processings with a previous data and outputs unmatched information, such ...
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JP3272537B2 |
PURPOSE: To provide a variable bit vector quantization device in which a variable bit length quantized code is outputted and the number of output bits is reduced. CONSTITUTION: In a vector quantization device which is provided with a cod...
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JP2002101072A |
To solve the problem in communication between ships in cases where it is necessary to install a large-sized interleaver and the transmission efficiency is deteriorated, when an interleave system is set which can cope with fading accompan...
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JP2002101070A |
To bring into play the characteristics of a high-speed Hadamard transformation in a back diffusion circuit, while processing at an operation amount equal to or less than a case, where back diffusion is carried out for each channel, even ...
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JP2002510455A |
The invention relates to digital signal processing and specificly to level control of a pulse density modulated (PDM) signal generated by a sigma-delta modulator. A single-bit pulse density modulated PDM signal is generated by a first si...
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JP2002509377A |
A SIGMA DELTA modulator-controlled, phase-locked-loop circuit, and an associated method, generates a frequency-regulated signal which does not exhibit undesired tones. Dithering signals are generated and are provided to a SIGMA DELTA mod...
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JP3269690B2 |
PURPOSE: To perform highly precise sound field control through a small number of filters by compressing a sound field coefficient based upon a sound field impulse response adaptively to PASC and decreasing the number of parameter setting...
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JP3268368B2 |
PURPOSE: To provide a signal processor like an ADPCM decoder. CONSTITUTION: This signal processor receives an input signal. As a part of a CCITT recommended G.726 algorithm, an ADPCM decoder 28b processes the input signal to give a linea...
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JP2002084244A |
To realize a narrow band digital filter bank in which deterioration in a frequency utilizing efficiency due to cascade connection is avoided.Branching circuits 11, 21-22N and multiplexing circuits 41-42N, 61 connected in cascade are grou...
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JP3266178B2 |
To improve tone quality with less operation amounts by quantizing a second coefficient, outputting it as a quantization coefficient signal and outputting a voice source signal from a first coefficient signal, the quantization coefficient...
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JP2002077920A |
To improve the picture compression ratio in the reversible picture compression.A special transform type context model coding means 100 inputs picture signals according to a context modeling and codes them. A transform predictive differen...
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JP2002077925A |
To provide a digital compressed dynamic image stream re-coding apparatus which avoids greatly deteriorating the picture quality during re-coding, suppresses the apparatus cost/scale from increasing and reduces the delay.A picture type an...
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JP2002077911A |
To enhance image compression rate of sub-band/wavelet transformation reversible compression.A hierarchical processing means 100 receives an image signal and divides it into two specified areas depending on the frequency components thereo...
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JP2002073097A |
To perform the high-quality encoding of an incoming signal by improving the encoding performance of a fixed code note.An LPC(Linear Prediction Coding) analyzer 101 performs the linear prediction analysis of an inputted voice signal, and ...
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JP3264290B2 |
PURPOSE: To speedily search prescribed data in accordance with an entry packet by multiplexing the entry packet generated in accordance with an entry point signal with data of a variable rate. CONSTITUTION: A controller 8 receives an ent...
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JP3264626B2 |
To realize a high compression rate and a high transmission line error resistance in a vector quantizing device which is used in the voice information compression field that is necessary for a digital telephone set and a digital sound rec...
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