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JP3824810B2 |
To make the transmitting quantity of a coded word index constant and keep the identifying performance to pitch period in a voice coding/decoding method based on A-b-S(analysis by synthesis) vector quantization using a voice source coded ...
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JP3819023B2 |
PCT No. PCT/FI94/00414 Sec. 371 Date May 19, 1995 Sec. 102(e) Date May 19, 1995 PCT Filed Sep. 19, 1994 PCT Pub. No. WO95/08877 PCT Pub. Date Mar. 30, 1995A transcoding and transdecoding unit in a digital mobile radio system, and methods...
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JP2006519542A |
A system and method for transmission and receipt of multi-band communication according to their time slot sequence includes at a transmitting end: an encoder for encoding data according to a time slot position (s 1, s 2, s 3, s 4 ) for e...
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JP3812775B2 |
To provide a one-bit signal processing unit where delta sigma modulators are connected in cascade. The delta sigma modulator receiving nth (≥1) order sets of 1-bit signals is provided with a linear audio signal processing section 20 th...
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JP3812774B2 |
To provide a 1-bit signal processing unit by which the S/N is improved for a signal band. A 1-bit signal at a 1st sampling frequency is fed to the 1-bit signal processing unit. An up-converter 12 increases a sampling frequency. Delta- si...
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JP3813025B2 |
To properly discriminate between long and short blocks so that increase in a quantity of codes and deterioration in sound quality do not occur, and also to make it possible to group the short blocks. This digital acoustic signal encoding...
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JP3809589B2 |
PURPOSE: To reduce the space, cost, and power consumption of a receiver by down-converting carrier frequency signals by using a temporally discrete sample extracting means. CONSTITUTION: A receiver uses a sigma/delta analog/digital modul...
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JP3811002B2 |
To obtain a receiving apparatus which reduces a circuit scale and which can enhance an error correction capability. The receiving apparatus is constituted to be provided with a modulation-system judgment 61 which judges a modulation syst...
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JP3807599B2 |
To make the efficient use of the transmission line characteristics and also to simply improve the amplitude characteristics when an audio signal is transmitted through the transmission line which permits high transmission rate in connect...
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JP3806770B2 |
To solve the problem that, in a window processor which reproduces data coded in a frame unit of an MPEG2(moving picture expert group) audio or the like by making frames adjacent each other to be partially overlapped, when the order of fr...
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JP3806344B2 |
To accurately detect a stationary noise signal section by discriminating between a stationary signal with periodicity and a stationary noise like white noise. A 1st decision unit 121 temporarily decides whether a current process unit is ...
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JP3804968B2 |
The invention relates in general to low bit-rate encoding and decoding of information such as audio information. More particularly, the invention relates to computationally efficient adaptive bit allocation and quantization of encoded in...
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JP3801198B2 |
During recording of an MPEG information signal on a record carrier (40), transport packets (Pk) are stored in signal blocks in a track (1) on the record carrier (40). x transport packets of the MPEG information signal are stored in the s...
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JP3798430B2 |
A data transmission apparatus for transmitting an original data has a converter for converting the original data to sequential data codes. The data code is formed by a combination of HIGH level binary codes and LOW level binary codes. Th...
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JP3799951B2 |
To shorten the switching time at channel revision. In the case of broadcasting information channels by OFDM system, the information channels are not transmitted separate by through OFDM modulation applied to the respective channels, but ...
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JP2006517045A |
The aim of this invention is to be able to recover specific information of a security module when it has been replaced by a new module in a user unit connected to a broadcasting network. This aim is reached by a method of storage and tra...
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JPWO2004091202A1 |
A moving image processing device having a user interface that is very easy to use when selecting a part of moving images from a large number of moving images is provided. This video processing device has a video display unit that sequent...
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JP3792250B2 |
PCT No. PCT/DE93/01047 Sec. 371 Date May 2, 1995 Sec. 102(e) Date May 2, 1995 PCT Filed Nov. 2, 1993 PCT Pub. No. WO94/10758 PCT Pub. Date May 11, 1994A process for transmitting and/or storing digital signals of multiple channels. This p...
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JP2006174028A |
To provide a voice coding method, a voice decoding method, a voice coding apparatus and a voice decoding apparatus that are low in delay, high in quality and reduced in voice quality deterioration with respect to transmission errors.At c...
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JP3790731B2 |
To provide a data recovery circuit having a sampling frequency less than a data clock frequency. A method and related circuit for recovering a digital signal can operate with a sampling frequency less than a data frequency. The circuit i...
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JP2006157361A |
To reproduce audio data faithfully to original sound and to improve the sound quality of audio data to be reproduced by making sampling frequencies coincide with each other between a transmitting side and a receiving side and enhancing a...
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JP3785199B2 |
PURPOSE: To obtain a device for encoding a picture signal so that an encoded output signal can be excellently suited to recording or subsequent edition. CONSTITUTION: A device constitutes an MPEG encoder 2 equipped with a pre- analyzer 8...
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JP3781428B2 |
An impulse radio communications system using one or more subcarriers to communicate information from an impulse radio transmitter to an impulse radio receiver. The impulse radio communication system is an ultrawide-band time domain syste...
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JP3778932B2 |
A method of, and system for, communicating messages in an environment which is subject to fading, in which data to be transmitted is encoded and formatted, a checksum is determined for said encoded and formatted data and in which the che...
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JP3778969B2 |
To provide a means which modulates and demodulates communication signals for which spread spectrum is desirable. Spread code generators 420 and 440 receive an appropriate delay value, either Ipos or Qpos, from an encoder 10 and generates...
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JP3775762B2 |
To maintain the quality of picture by detecting the local maximum value of histogram and calculating, based on a different measured between these maximum value and the average delta of these distances at a quantizing step so as to reduce...
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JP3773509B2 |
To obtain a wideband speech restoring device for restoring wideband voice signals of high quality by estimating a stable wideband sound source at more accurate amplitude from a narrow band speech or narrow band voice codes without being ...
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JP2006108833A |
To provide a technology of enhancing a transmission efficiency of information while efficiently transmitting power.One communication period ψ for transmitting 3-bit data is divided into four periods T1 to T4, and a valley pulse is locat...
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JP3764609B2 |
To properly decide code conversion executed by an exchange by taking a coding conversion function of the exchange and a coding system or the like used by a terminal into account. Information of a coding system used by a mobile unit 40, i...
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JP3765622B2 |
To provide an audio decoder and an audio encoding/decoding system which can correct its output so as to improve sound quality of the output with a simple circuit configuration. This audio decoder is constituted so that the decoder can pe...
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JP3762621B2 |
To provide a communication terminal which can prevent deterioration in voice transmission performance due to the difference in voice compression method, and thereby further improve the voice quality of conversation than in the convention...
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JP3761795B2 |
To solve the conventional problem that proper coding speed information cannot be transferred to a voice decoder, since the mismatching between the transmission speed of an actual coding voice signal and an allocated transmission speed on...
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JP3759963B2 |
A transmission method for implementing variable rate transmission. Part of the baseband processing of a transmitter based on a CDMA transmission scheme is described. A transmitted information sequence in the form of a digital signal is p...
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JP2006074331A |
To enhance maintainability on a use application base for a diversified picture.A picture processor involves: generating picture processing for an input picture accepted by an picture input means 50 as a picture object by a picture object...
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JP2006074508A |
To provide a digital wireless receiving system and its method capable of reducing a generated noise even if a bit error rate of a received signal exceeds an error correctable range.In a voice complement part 26 of a receiving device, eac...
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JP3748261B2 |
To provide an ADPCM system decoder with excellent sound quality and a simple configuration for adopting simple processing. A shift register 1 receives a quantized differential signal decomposed into a mantissa part and an exponential par...
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JP3747072B2 |
The invention relates to a transmission system with a sub-band echo canceller (5, 6) with a canceller (5) which can be inserted between a receiving link (r) and a transmitting link (s). To reduce the computing effort and the signal trans...
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JP3737592B2 |
To provide a quaternary FSK demodulation circuit which rationalizes a demodulation result. This circuit detects the rotation direction and the rotation speed of movement between signal points arranged on a plane formed with two axes of i...
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JP2006011464A |
To provide a speech communication system and method which are improved for handling information lost during transmission from the encoder to the decoder.In the improved speech communication system, the minimum spacing between LSFs is set...
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JP3734871B2 |
To transmit images with high efficiency and in a short time even via a communication path having a large error rate by transmitting only the contour block of an image with encoding of an information source to transmit it again as necessa...
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JP3733588B2 |
To decrease a computational quantity for post-filter processing. A device for voice decoding comprises a synthesizing filter 1 which adds a background noise signal to a signal 5 obtained by decoding a received voice signal 3 and performs...
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JP3734696B2 |
To reproduce background noise so as to get rid of the sense of incongruity in the subsequent silent interval even when the compressed voice data, which is a base for reproducing of background noise, is lost. A voice coding processing par...
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JP2006500811A |
The invention relates to a video recorder unit which has a receiver ( 211 ) receiving mixed content video channels ( 101,103,105 ) having a mixed content of special content clips ( 111,117,123,127,129,133,135,139,149 ) and programs ( 107...
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JP3728171B2 |
To efficiently calculate reliability information through the use of a software output detector by receiving first and second samples from a transmitted symbol, evaluating an algebraic expression on the samples and a priori information an...
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JP3730238B2 |
To provide an encoding device for a communication system which uses a channel encoder connecting convolutional codes in parallel or serial. This channel encoding device comprises a first encoder which encodes information bits that are in...
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JP3721582B2 |
A signal encoding apparatus for encoding an acoustic signal. This signal encoding apparatus includes a transform circuit for transforming an inputted acoustic signal into frequency components, a signal component separating circuit for se...
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JP3715653B2 |
In a method of lossless processing of an integer value signal in a prediction filter which includes a quantiser, a numerator of the prediction filter is implemented prior to the quantiser and a denominator of the prediction filter is imp...
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JP3715417B2 |
To reduce arithmetic amount in searching a noise excitation source and to dispense with a memory for storing a noise excitation source code vector by coding secondary error signal itself which was done by noise excitation source code vec...
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JP2005295521A |
To provide a transmitter circuit that is capable of suppressing quantization noise and operating with a high efficiency, a data converter section and a data conversion method for use therein, and a communications device.The present inven...
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JP3707751B2 |
To reduce power consumption depending on the utility state of a prompt video image by applying decoding processing to a coded signal only when the coded signal is given to a transmission system and the signal is used by the transmission ...
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