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Digital signal encoding apparatus and method digital signal decoding apparatus and method, and digital signal transmission system

A technology of digital signal and coding device, applied in digital transmission system, transmission system, time-division multiplexing system, etc., can solve problems such as unsatisfactory, and achieve the effect of suppressing the band component of audio signal

Inactive Publication Date: 2002-12-18
SONY CORP
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Problems solved by technology

Therefore, the data to be transferred becomes at least 2 times in number, resulting in a 4 times transfer rate which is undesirable due to the antiphase signal added therein

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  • Digital signal encoding apparatus and method digital signal decoding apparatus and method, and digital signal transmission system
  • Digital signal encoding apparatus and method digital signal decoding apparatus and method, and digital signal transmission system
  • Digital signal encoding apparatus and method digital signal decoding apparatus and method, and digital signal transmission system

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Embodiment Construction

[0028] The best implementation mode of the present invention will be further described below in conjunction with the accompanying drawings. First, a digital signal encoding device and method according to the present invention will be explained. The digital signal encoding device encodes 1-bit audio signals of two channels, ie, an R channel and an L channel, obtained by performing ΔΣ modulation, and is configured as figure 1 Digital I / O Encoder 1 shown in .

[0029] The digital I / O encoder 1 includes a phase modulator 7 for phase modulating a 1-bit audio signal, and an information data adding unit 11 for inverting data by rearranging the data based on two channel units, or Data having a phase opposite to that of the 1-bit audio signal data to be phase-modulated, information data related to the 1-bit audio signal is added to the phase-modulated 1-bit audio signal data.

[0030] The digital I / O encoder 1 further includes a scrambler L4 for scrambling the L channel 1-bit audio s...

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Abstract

The present invention provides a digital signal encoding device, which is used to encode 1-bit signals of n (n≥2) channels modulated in a ΔΣ mode, and the device includes a channel multiplexer 6, which is used for multiplexing the signals provided by the scrambler L4. The scrambled data and the scrambled data provided from the scrambler R5, a phase modulator 7, used to phase modulate the composite data provided from the channel multiplexer 6, a synchronous signal adding and correcting unit 8, used to receive at the synchronous timing signal generated and supplied from the synchronous timing signal generator 9, and inserting the synchronous signal into the phase-modulated 1-bit audio signal data supplied from the phase modulator 7 to generate a synchronous pattern and to correct the synchronous pattern, And an information data adding unit 11, based on two channel units, by rearranging the inversion data in the phase-modulated 1-bit audio signal data, adding and correcting the information data related to the 1-bit audio signal through synchronous signal Unit 8 adds to the phase modulated 1-bit audio signal data.

Description

technical field [0001] The present invention relates to a digital signal encoding device and method for encoding a 1-bit signal modulated in a ΔΣ mode; a digital signal decoding device and method for decoding a signal encoded by a digital signal encoding device and method; and a digital Signal transmission system. Background technique [0002] The data format of the high-speed 1-bit audio signal modulated by the ΔΣ method is characterized by a relatively high sampling frequency, that is, 64×44.1kHz, and a very short data word length, that is, 1 bit. Compared with this, the traditional digital The sampling frequency of the audio signal is 44.1kHz, and the data word length is 16 bits. Therefore, by using a high-speed 1-bit audio signal, a wider transmittable frequency band can be obtained. Even if the data word length of a high-speed 1-bit audio signal modulated in the ΔΣ method is 1 bit, with such a signal, a high dynamic range can be obtained in the audio band, which is at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00H03M3/02H03M7/32H04J3/00H04J3/16H04L1/00
CPCH04J3/1605H04L1/0063H04L1/0083H03M3/02
Inventor 野口雅义市村元
Owner SONY CORP
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