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WO/1982/001111A1 |
A data transmission system where data signals are transmitted by the transmitter (101 and Fig. 2) with four possible two-bit binary states of the true data (221) and complement data (220) signal lines. A word state is provided before and...
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WO/1982/000396A1 |
Apparatus for processing information signals in a plurality of information channels comprises a comparator (634-648) for comparing samples of a first information signal in a first channel (Y) with a plurality of selected combinations of ...
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WO/1982/000390A1 |
In an analog to digital converter circuit (10) for a CODEC a single reference voltage (VREF) is used for comparing both positive and negative input signals. The circuit comprises a capacitor array (40) to define the decision levels corre...
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WO/1982/000226A1 |
A single carrier is amplitude-modulated by a signal which is a transform (as the sine function) of the audio signal, and one set of sidebands is removed. In a receiver (76), the signal can be recovered by first deriving the Hilbert trans...
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WO1982000072A1 |
An analog-to-digital converter comprises amplifiers (2), an analog switch (3) connected with its inputs to the amplifiers (2) and a multistage comparison unit (4) receiving at its input the output signal from the switch (3). The converte...
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WO/1981/003728A1 |
Subscriber line audio processing circuit apparatus comprising an analog-to-digital converter (16) coupled to a subscriber line for sampling an input audio signal at a first sampling frequency and for developing a series of digital words ...
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WO/1981/003725A1 |
An interpolative analog-to-digital converter comprising an integrator (77) for integrating the difference between an input analog signal x(t) and a quantized signal q(t) to develop an integrated signal, a first comparator (78) for sampli...
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WO/1981/003724A1 |
An interpolative encoder for a subscriber line audio processing circuit including an interpolative analog-to-digital converter as shown in Fig. 9 for converting an input analog signal to a digital signal including a series of multi-bit b...
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WO/1981/003590A1 |
A converter of P-codes into analog values comprises key elements (1) and an adder (2) of standard analog values, the output of which is the output of the converter. The converter is provided with a code sweep unit (5), a unit (6) for dif...
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WO/1981/000181A1 |
Pulse code modulated (PCM) signals are used to produce differential pulse code modulated (DPCM) signals and the (PCM) and (DPCM) are mixed and transmitted together as a composite signal whereby on reception all or substantially all the D...
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WO/1981/000180A1 |
Device for the tracking and recursive estimation of the local state of image contours, particularly in television, and application to the adaptative prediction in differential coding. The predictor according to the device operates by cal...
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WO/1979/000901A1 |
A predictive speech signal processor features an adaptive filter (120) in a feedback network (137) around the quantizer (111). The adaptive filter (120) essentially combines the quantizing error signal, the formant related prediction par...
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WO/1979/000462A1 |
A method and an arrangement for reducing the demand on the number of transferred bits when transferring PCM information. Polarity and amplitude information are transmitted from a transmitter side to a receiver side, expressed by binary c...
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JP7229600B1 |
A novel mechanism for encrypted signal generation and decryption is provided. An encrypted signal generator (5) for generating an electric signal corresponding to the encrypted signal, a first wave generator (11), and a first wave genera...
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JP7099447B2 |
The present technology relates to a signal processing apparatus, a signal processing method, and a program that can smoothly switch and reproduce a DSD signal and a PCM signal.A communication unit acquires a PCM signal and a DSD signal. ...
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JP7093166B2 |
To provide a receiver which allows for demodulation of a signal, subjected to MSK modulation at a predetermined first frequency and a second frequency of 1.5 times of the first frequency, by setting a reception transmission speed corresp...
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JP7063164B2 |
An optical transmitting device includes a plurality of transmitters configured to be arranged so as to correspond to a plurality of channels, the transmitters each reproducing a clock from an input data signal, and outputting the data si...
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JP6935894B2 |
According to the present invention, a signal source provides, to a first transmission device and a second transmission device, a reference signal to which a plurality of pseudo noise (PN) sequence signals of different stage numbers are a...
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JP6909289B2 |
Systems and methods are described to time delay a signal output from an analog-to-digital converter (ADC). The ADC includes a digital sensor responsive to an analog field quantity. The digital sensor is configured to output an oversample...
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JP6725996B2 |
To provide a technology for realizing an optical communication system which transmits optical signals by using a wavelength multiplexing technology and a mode multiplexing technology together.An optical communication system is configured...
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JP6700507B6 |
Encoding and decoding systems are described for the provision of high quality digital representations of audio signals with particular attention to the correct perceptual rendering of fast transients at modest sample rates. This is achie...
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JP6725995B2 |
To provide a technology for realizing an optical communication system which transmits an optical signal by using a wavelength multiplexing technology and a mode multiplexing technology together.An optical communication system is configur...
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JP6656648B1 |
To transmit an information group to be transmitted with as little information as possible. An information group to be transmitted is divided into predetermined components, different basic cycles corresponding to the predetermined compone...
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JP2020025151A |
To provide a base station device, a terminal device, and a communication method capable of highly efficient communication when there is a possibility of collision of transmission signals.A base station device includes an encoding unit an...
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JP2019134414A |
To provide redundancy architectures for communications systems.In a redundancy architecture 300, one or more RF signal splitters (an m×n input network 302) are configured to split each of multiple RF input signals into multiple copies o...
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JP6481557B2 |
An optical receiver including: a digital filter that performs spectral shaping on a signal; an analyzer that analyzes a spectrum waveform of the signal; a determiner that determines, based on an analysis result by the analyzer, whether t...
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JP6444422B2 |
At least one tone is generated. An output signal is generated in response to an input signal and the at least one tone. The output signal is modulated. The input signal and the at least one tone are represented in the modulated output si...
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JP2018148510A |
To improve a quality of a pulse width modulation signal in an RF band.A communication apparatus generates a modulation signal on the basis of a fluctuation component signal and a phase component signal indicating a fluctuation and a phas...
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JP6378654B2 |
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JP6372268B2 |
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JP6337455B2 |
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JP6306072B2 |
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JP6253121B2 |
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JP6236871B2 |
An optical transmission apparatus includes: an optical amplifier configured to amplify a wavelength multiplexing light to be transmitted, the wavelength multiplexing light being input thereto; a combining unit configured to combine a plu...
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JP6177391B2 |
An overshoot compensation circuit for an input signal, having a slew rate detection circuit configured to detect a slew rate of the input signal; a run time circuit configured to initialize a predetermined run time when an absolute value...
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JP6170216B2 |
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JP6087256B2 |
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JPWO2014136193A1 |
Regarding the IQ data of the modulated digital signal transmitted and received between the REC (Radio Equipment Controller) (101) and RE (Remote Equipment) (102) between the pair of devices, when the receiving device is RE (102) , The IQ...
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JP6077914B2 |
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JP5982569B2 |
A base station system according to an aspect of the invention includes a baseband unit (BBU) and a radio frequency (RF) unit (RFU) connected to the BBU via a communication line. The RFU (BBU) measures the frequencies of occurrence of sam...
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JP2015188230A |
To provide a simpler and more area-efficient sampling technique that alleviates the need for high-speed sampling clocks while minimizing undesirable effects of aliasing.A data converter circuit includes a non-uniform sampling circuit 400...
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JP5660467B2 |
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JP5626044B2 |
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JP5474943B2 |
A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit o...
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JP5474942B2 |
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JP5464752B2 |
A framer circuit is provided with a FAS search block (901) being configured for performing two searches, a first search (941) for a first part of a sequence of framing bits, and a second search (942) for a second part of said sequence of...
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JP5379127B2 |
An error coding circuit comprises a non-systematic convolutional encoder for coding an input bit stream to produce two or more groups of parity bits, an interleaver circuit for interleaving parity bits within each group of parity bits, a...
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JP5331091B2 |
The present invention provides a communication system. When the audio signal in the wide band is input to a wireless microphone, the wireless microphone performs a balanced modulation processing to invert the frequency spectrum of the au...
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JP5255358B2 |
To suppress generation of an abnormal sound and a noise due to a transmission error with simple constitution in a sound transmission system which transmits and receives a sound signal in packets. The system includes a sound transmitting ...
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JP5221359B2 |
An apparatus and method to generate a dual transport stream. The apparatus includes an eraser encoder to receive a turbo stream and to eraser-encode the turbo stream, a duplicator to provide a parity insertion region for the eraser-encod...
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