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Document Title |
JP3920220B2 |
De-interleaving and rate de-matching of a demodulated signal are performed by batch process at the receiving side which received a radio signal subjected to interleaving and rate matching at the transmitting side for error correction.
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JP3922979B2 |
To provide a transmission line encoding method, a decoding method, and an apparatus capable of realizing a low delay and suppressing the degradation of a decoded sound signal without additional redundant bits. An audio encoder 100 conver...
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JP3918034B2 |
A method and apparatus is disclosed for determining a masked threshold curve as a function of frequency from an information signal. The method includes (a) a first step of determining for each frequency value a first masking component MC...
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JP3911398B2 |
To provide a time interleave method for minimizing memory size and at the same time processing time, and to provide a time deinterleave method. The amount of memory for storing the modulation symbol of each carrier for time interleave is...
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JP3912389B2 |
To achieve joining of 1-bit signals produced respectively at different sampling frequencies in an integer multiple relation to each other without causing noise. Upon the receipt of a switching request signal 302, a controller 13 controls...
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JP3907906B2 |
To solve the problem that an encode characteristics is deteriorated where position candidates at every voice source number are distributed uniformly in a frame, in order to realize the position candidates with a low bit rate, since only ...
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JP3907406B2 |
To control a UW(unique word) in response to a change of a line status between radio stations, so as for the UW to be optimum for the line status. A line status measuring device 15 measures how serious an error code is generated in a rece...
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JP3901607B2 |
To provide a signal processing apparatus with a small circuit scale, a non-integral frequency divider and a fractional N PLL (phase lock loop) synthesizer having the same. An adder 8 and a delay device 10 constitute a 9-bit accumulator, ...
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JP2007082253A |
To provide a method and apparatus for selecting error correction code rates, in a cellular radio communication system.Each base station broadcasts a power product (PP), which is equal to the base station transmission power PBT, multiplie...
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JP3898218B2 |
A transmission system for encoded transmission of audio signals with frequency band compression. An input signal to be transmitted is divided into two spectral portions in a coder. One spectral portion is digitally encoded by a time-doma...
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JP3898775B2 |
To restore a data stream without producing various kinds of noises when a digitized sound is erased during transmission. The information of digital sounds such as voices is generally transmitted by a burst containing the samples of plura...
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JP3895325B2 |
To provide the delta / sigma modulator which minimizes an effect of a noise by reducing a quantization noise. The delta / sigma modulator comprises a 1-bit quantizer, a N-bit quantizer and an error correction circuit. The quantization no...
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JP3894946B2 |
To provide a coding device for adjusting a signal rate in a wireless communication system. A coding device includes a coding circuit for converting a digital input into a coded output having a greater number of bits than the input, an in...
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JP2007067797A |
To lower the manufacturing cost of a sampling rate converter.The sampling rate converter is provided with a buffer (203) which captures input data, a sampling rate converter core (201) for converting the sampling rate of its output data,...
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JP2007065650A |
To provide an infrared filter achieving the reduction of cost and the improvement of optical characteristic, and the shortening of designing time and working time by applying infrared cut coating to the window glass of a camera module an...
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JP3888565B2 |
To perform pulse density modulation more accurately than a conventional manner in a pulse density modulating device. It is possible to establish linearity between corrected pulse density modulation waveform data SK and its DC component a...
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JP3890605B2 |
Inputted audio signals are compressed and encoded by a speech encoder (3), sent to an RF transmission processor (4), subjected to channel encoding, modulation and transmission processing, and transmitted through an antenna (11). Signals ...
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JP3888698B2 |
PURPOSE: To provide a transmission system where an interpolation error is reduced and the audible quality of a reception signal is considerably improved. CONSTITUTION: Only a part of a series of signal samples is transmitted to a receive...
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JP3887028B2 |
PURPOSE: To obtain a signal, which characterizes each of primary signals from plural signal sources mixed by linear convolution, with a high precision in a small number of signal calculation processing stages. CONSTITUTION: A signal sour...
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JP3886815B2 |
To provide a voice encoding device, a voice decoding device, a voice encoding method and a voice decoding method which enable reproduction of voice of high quality without increasing the quantity of information to be transmitted. In the ...
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JP2007049723A |
To provide a transmission/reception system for transmitting much more information at one and same frequency band by solving impossibility of increasing a transmission information amount when the frequency band is limited in transmission ...
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JP2007049724A |
To provide a transmission/reception system for transmitting much more information at one and same frequency band by solving impossibility of increasing a transmission information amount when the frequency band is limited in transmission ...
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JP3883923B2 |
To provide a correlator in which an SN ratio of the correlator to calculate a correlation with received signals and a template string is improved in an impulse wireless receiver. The product of the received impulse string 500 and the tem...
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JP3880339B2 |
To provide a device and a method for determining the pulse position of a signal encoded by pulse modulation. In the device and the method for determining pulse position of signal encoded by pulse modulation, a signal can be received as a...
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JP3881679B2 |
To provide a transmitting/receiving system in which much more information can be transmitted on the same frequency band by solving a problem that a transmission information quantity can not be increased when a frequency band is limited i...
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JP3881680B2 |
To provide a transmitting/receiving system for transmitting much more information in one and the same frequency band by solving a problem that a quantity of transmission information can not be increased when a frequency band is restricte...
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JP3876781B2 |
To make it possible to decode voice of high sound quality in each user. A portable telephone set 421-1 encodes user's voice data and outputs the encoded voice data. At the time of no-calling, voice sample data which are not encoded yet a...
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JP2007027806A |
To provide a portable terminal device which is provided with a fuel cell and excellent in portability.Two casings are coupled by a coupler 400 so that the device can take a first state in which a display casing 200 and a grip casing 300 ...
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JP3872115B2 |
PURPOSE: To connect signals without using any large-scaled transformer or capacitor between more than two electric circuits operating with different voltages. CONSTITUTION: A node 911 at a transmission side is connected through an aeries...
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JP2007500986A |
A dual-channel network with in each case one communication controller (2, 6) for each of the two channels (A, B). In order to ensure that the two channels (A, B) operate on a temporally matched basis, an exchange of current states ("read...
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JP3870170B2 |
To provide a radio communication method for extending a digital transmission band by utilizing two different polarized planes and performing amplitude shift modulation by comparison of relative amplitudes in respective polarized planes a...
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JP3869211B2 |
A pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device whi...
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JP3862735B2 |
To provide a secondary station which communicate a message in an environment which is exposed to fading. At a transmitter, a checksum (CSM) is determined for an encoded and formatted data, and the checksum (CSM) is concatenated with enco...
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JP3862734B2 |
To provide a system for communicating messages in an environment which is subjected to fading. At a transmitting side, a checksum (CSM) is specified for encoded and formatted data and the checksum (CSM) is added to an address code word (...
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JP3859462B2 |
To provide an apparatus and a method for analyzing a forecasting parameter with high analysis performance by which the interfusion of an unnecessary component can be suppressed to the minimum. The apparatus, for analyzing the forecasting...
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JP3851130B2 |
To provide a peripheral device of a portable viewing device excellent in usability and to provide a broadcasting viewing system. A fixed type peripheral device 1 receives broadcasting and stores encoded video data in a memory card 3. A p...
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JP3849914B2 |
To enable a parallel processing at high speed by preventing access collision while suppressing an increase in storage capacity for a buffer memory. A subband encoder divides an input signal into areas and divides band in a parallel proce...
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JP3849210B2 |
To enable controlling dynamically quantity of coding information in accordance with the situation, to enable securing a transmission real time characteristic independently of variation of a circuit condition, and to enable varying flexib...
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JP3845505B2 |
To eliminate noise included in an input 1-bit signal without increasing a degree number by allowing the modulator to have a middle stage mixing means and a final stage mixing means in addition to a quantization means and a 1st stage mixi...
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JP3844352B2 |
To automatically adjust the synchronization between an amplitude signal and a phase signal in a transmitter such as a polar modulation transmitter. A polar signal generation circuit 101 generates a signal corresponding to the amplitude a...
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JP3842269B2 |
In a transmitting/receiving apparatus (6) of a transmitting side, a signal from an input terminal (Ti) is inputted to a delta sigma modulator circuit (42), delta-sigma modulated thereby, thereafter packet-divided by a transmitter (12), a...
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JP2006523996A |
Sample rate converters ( 12 ) for converting input sample rates (F81) of signals into output sample rates (Fs4) are provided with sample rate adapters ( 3,6 ) for adapting (basic idea) intermediate sample rates (Fs 2 ) such that output s...
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JP3835822B2 |
The present invention relates to arrangements and methods for radio frequency modulation and power amplification of an information signal (XIF). Modulation and amplification of the information signal (XIF) is carried out with very high l...
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JP3831608B2 |
To provide improved error detection technology used to process digital audio information received by a digital communication system or information of other types. To control the generation of an error indicator for a packet, control info...
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JP3829853B2 |
To read out the image of a boundary region faithfully even if the interval of boundary imaging devices is larger than the interval of imaging devices without using interpolation data (data of virtual imaging element). The image sensor di...
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JP3830106B2 |
An arrangement for determining a signal spectrum of a wideband digital audio signal in an adaptive bitallocation system, including a signal splitting unit for splitting the wideband digital audio signal into M narrow band sub signals (SB...
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JP2006261826A |
To provide a receiving apparatus and a receiving method capable of demodulating received data stably even against amplitude variations of a received signal and a code error due to noise.An incidence rate calculation section 140 obtains a...
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JP3827720B2 |
In a transmission system for transmitting speech and music signals, an input signal is coded in a coder (11) by a time domain coder (4). The output signal of the time domain coder (4) is decoded by a time domain decoder (8) and the signa...
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JP3826185B2 |
A method to detect a presence of a hangover period in a speech decoder in a communication system that utilizes discontinuous transmission between a transmitter and a receiver. The discontinuous transmission is defined by temporally seque...
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JP3822632B2 |
[Problems] To realize a reliable and stable transfer of digital data that does not require a reference clock and a handshake operation. [Means for Solving the Problems] The present invention provides a digital data transfer method for al...
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