RU169931U1 - AUDIO COMPRESSION DEVICE FOR DATA DISTRIBUTION CHANNELS - Google Patents

Abstract

The invention relates to a device for achieving high-quality sound representation in high noise environments, in particular to a device for compressing audio data containing at least one audio signal. The technical result is to increase the compression efficiency of audio content. A device for compressing audio data contains serially connected: a unit for processing and storing audio data, a delta-sigma modulator with charge balancing, a digital integrator, a digital low-pass filter, a compressor that compresses said audio signal by attenuating the high-amplitude characteristics of the audio signal and amplification of low-amplitude characteristics of the audio signal, as well as a feedback module, the input of which is connected to the output of the digital integrator, a phase detector connected to the output of the image module communication, and a differentiator, the input of which is connected to the output of the phase detector, and the output to the delta-sigma modulator, a transceiver connected to the compressor and two-way communication to the processing unit and storage of audio data.

Description

FIELD OF TECHNOLOGY

The invention relates to a device for achieving high-quality sound representation in environments with a high noise level, in particular, to a device for compressing an audio signal for transmission over various data transmission channels containing at least one audio signal.

BACKGROUND

The prior art device for processing an audio signal described in patent RU 2407142 C2, publ. 12/20/2010. This device processes audio signals, including compressing media data, to represent them in a high-noise environment, and additionally provides adjustment methods with constant programming of a multi-band equalizer that compensate for anomalies associated with the intended listening environment. The disadvantage of this device is the lack of noise filtering during compression of the audio signal, as a result of which the compression process is not efficient enough.

This device is selected as the closest equivalent.

DISCLOSURE OF A USEFUL MODEL

The technical task of the claimed utility model is to create a device for more efficient compression of media data.

The technical result is to increase the compression efficiency of media data for transmission over a media channel by reducing the amount of noise in the audio signal.

To achieve a technical result, the claimed device for compressing audio data contains serially connected: a data processing and storage unit, a delta-sigma modulator with charge balancing, a digital integrator, a digital low-pass filter, a compressor that compresses the mentioned audio signal by attenuating the high-amplitude characteristics of the audio -signal and amplification of low-amplitude characteristics of the audio signal, as well as a feedback module, the input of which is connected to the output of the digital integrator, phases a second detector connected to the output of the feedback module, and a differentiator, the input of which is connected to the output of the phase detector, and the output to the delta-sigma modulator, a transceiver connected to the compressor and two-way communication to the processing unit and storage of audio data.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 is a general view of the claimed device.

IMPLEMENTATION OF A USEFUL MODEL

In particular, the claimed device 10 shown in FIG. 1, contains: an audio data processing and storage unit 1, a charge-balanced delta-sigma modulator 2, a digital integrator 3, a digital low-pass filter 4, a compressor 5, a feedback module 6, a phase detector 7, a differentiator 8, and a transceiver 9.

Upon receipt of a request from an external device to the transceiver 9, the data processing and storage unit 1 extracts from the storage device in accordance with the request, audio data containing at least one audio signal that must be converted for transmission over the data channel, after which the audio data is supplied to the delta-sigma modulator 2 and their conversion from digital to analog audio signal is carried out in accordance with the specified characteristics in the working frequency band taking into account the signal projection. Next, the signal is processed by the integrator 3 and the integrated signal from the digital integrator 3 is fed to a digital filter 4, which provides suppression of components with frequencies above the Kotelnikov frequency. Next, the signal from the filter 4 enters the compressor 5, which compresses the audio signal by attenuating the high-amplitude characteristics of the audio signal and amplifying the low-amplitude characteristics of the audio signal. The compressed audio signal is transmitted to the transceiver 9 for its subsequent transmission on the selected data channel in accordance with the request.

To determine the correction signal, a feedback module 6, a phase detector 7, and a differentiator 8 are introduced into the device. Feedback module 6 is a fractional frequency divider. This module receives the integrated signal from the output of the digital integrator, processes it in accordance with a predetermined algorithm, and transfers it to the phase detector 7 and differentiator 8. The integrated signal processing algorithm is selected in accordance with the error value that needs to be adjusted. A phase detector 7 compares the received signal with a reference signal and, through a differentiator 8, generates a correction signal for a delta-sigma modulator 2. Methods of generating a reference signal for phase detectors are well known in the art and are not disclosed in this application. As an example, a reference signal generator may be used to generate a reference signal.

The transceiver 9 can be made in the form of a wireless communication module (such as Wi-Fi, Bluetooth, etc.), or a wired communication device (USB, RG-59, optical communication, Ethernet controller, etc.), and is intended for transmitting compressed audio signal received from the processing and storage unit of audio data 5 to various user devices in accordance with the received request.

The device is a single design, and all elements of the claimed device can also be placed in a single package, combined by a common data bus.

The claimed device is based on an advanced computing device, such as, for example, a personal computer, which includes the necessary set of hardware designed for data processing. Such means are a processor unit containing one or more processors, RAM and a means for storing information (Flash memory, HDD, SSD, ROM, EEPROM, etc.), which form an audio data processing and storage unit 5 in the claimed solution The design of said block 5 depends on the specific technical implementation of the server.

Thus, by using a delta-sigma charge-balanced modulator with a digital low-pass filter in the design of the device, and by providing feedback for adjusting the signal generated by the delta-sigma modulator, noise in the audio signal is reduced, resulting in compressed audio the signal takes up less volume, and therefore, the compression efficiency of audio data is increased and the throughput of the data transmission channel is increased.

Claims (1)

A device for compressing media data comprising at least one audio signal comprising in series connected: a media processing and storage unit, a delta-sigma modulator with charge balancing, a digital integrator, a digital low-pass filter, a compressor that compresses said audio -signal by attenuating the high-amplitude characteristics of the audio signal and amplifying the low-amplitude characteristics of the audio signal, as well as a feedback module, which is a fractional frequency divider, the input of which connected to the output of the digital integrator, and the feedback module is configured to receive an integrated signal from the output of the digital integrator, the processing algorithm of which is selected in accordance with the amount of error that needs to be adjusted, a phase detector connected to the output of the feedback module, and a differentiator, the input of which connected to the output of the phase detector, and the output to the delta-sigma modulator, the transceiver connected to the compressor and two-way communication to the processing unit and stored Nia musical data, wherein the phase detector is adapted to compare the integrated signal obtained from the feedback module with a reference signal and generating a correction signal via a differentiator to the delta-sigma modulator for adjusting the generated sigma-delta modulator signal.

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