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Modulating device and method, demodulating device and method, program, and recording medium

A technology of modulation equipment and demodulation equipment, applied in the direction of modulation carrier system, transmission system, multi-frequency code system, etc., to achieve the effect of reducing the scale of the circuit

Inactive Publication Date: 2009-09-16
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The BPF 40 extracts only a component (carrier component) of a predetermined frequency band of the data supplied from the adder 39, thereby realizing band limitation

Method used

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  • Modulating device and method, demodulating device and method, program, and recording medium
  • Modulating device and method, demodulating device and method, program, and recording medium
  • Modulating device and method, demodulating device and method, program, and recording medium

Examples

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no. 1 example

[0118] Image 6 is a diagram illustrating one embodiment of a modulation device to which the present invention is applied. The first embodiment is a modulation device and a demodulation device capable of improving robustness. Image 6 The modulation device 100 shown in is an illustration of the configuration of a device that modulates data input according to the OFDM (Orthogonal Frequency Division Multiplexing) method.

[0119] Image 6 The OFDM modulation device 100 shown in is composed of a serial / parallel conversion unit 101 (hereinafter referred to as "S / P conversion unit 101"), an IFFT (inverse fast Fourier transform) unit 102, and a parallel / serial conversion unit 103 (hereinafter referred to as "P / S converting unit 103"), guard interval increasing unit 104 (hereinafter referred to as "GI increasing unit 104"), D / A (digital / analog) converting units 105-1 and 105-2, low-pass filtering (LPF) 106-1 and 106-2, multipliers 107-1 and 107-2, oscillator 108, adder 109, bandpa...

no. 2 example

[0213] The second embodiment will be described below. The second embodiment is an embodiment realizing a scalable configuration. The following will refer to Figure 24 with 25 Describes scalable configurations. assumed Figure 24 A in is the current configuration of the substrate in which predetermined signals are input and processed. Data is input to an input substrate 401, the data is processed by a processing substrate 402, and an output substrate 403 outputs the data to an external device or the like. The input substrate 401, the processing substrate 402, and the output substrate 403 each process a plurality of data in a batch manner (parallel processing). These substrates are assumed to handle image data.

[0214] When substrates having such a configuration are in a certain state, it is conceivable to increase the processing speed when it is desired to process images of higher resolution than those that can be processed by these substrates. Such as Figure 24 As s...

no. 3 example

[0260] Next, a third embodiment will be described. The third embodiment is an embodiment in which data transmission is realized with little degradation. In the case of a system including a modulation device and a demodulation device that transmit compressed data, the third embodiment enables the demodulation device at the receiving end to efficiently reproduce data. Then, the modulating device on the transmitting side transmits the reduced image in the form of normal data, and transmits the data for efficient restoration by embedding the data for restoration into the subcarrier. The “data for effective recovery” embedded in the subcarrier and transmitted means a class value of 1-bit ADRC obtained from 4 pixel input data output from the class classification unit 602 as described later.

[0261] The receiving end receives the image data of the reduced image transmitted from the transmitting end, and the data embedded in the subcarrier, and uses the two data to reproduce the dat...

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Abstract

A modulating device configured to perform modulation with the orthogonal frequency division multiplexing method, includes: a modulating unit configured to modulate main information with the orthogonal frequency division multiplexing method; and a determining unit configured to determine a subcarrier pattern employed when modulating the main information by the modulating unit based on additional information relating to the main information.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2008-064221 filed in the Japan Patent Office on Mar. 13, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a modulation device and method, a demodulation device and method, a program, and a recording medium. Specifically, the present invention relates to a modulation device and method, a demodulation device and method, a program, and a recording medium, wherein information is included in a carrier wave , the information is processed at the receiving end to obtain high image quality and so on. Background technique [0004] figure 1 is a diagram illustrating the configuration of one example of a modulation device that performs wireless modulation. The baseband signal input to the modulating device is multiplied by an optional carrier at the multiplier 11,...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04J11/00H04N7/173H04N21/24
CPCH04L5/0044H04L27/2627H04L27/2649H04L5/0053H04L27/26524
Inventor 中西崇菊地正人望月俊助吉冈正纮荒木亮辅半田正树一木洋近藤哲二郎
Owner SONY CORP
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