KR100720679B1 - Audio interface possible to process plural channels and audio processing device thereof - Google Patents

Abstract

The present invention relates to an audio interface and a sound source processing apparatus capable of processing a plurality of channels. According to an embodiment of the present invention, there is provided an audio interface coupled with a host and an audio codec, the audio interface comprising: a plurality of transmission buffers for storing audio data received over respective transmission channels from a host; A transmission synthesizer for synthesizing and outputting a plurality of audio data stored in a plurality of transmission buffers; And a converter for converting the synthesized audio data input from the transmission synthesizer into a format corresponding to the audio codec and outputting the converted audio data. Accordingly, it is possible to provide an audio interface capable of processing a plurality of channels capable of processing audio data through a plurality of transmission channels using one audio interface, and a sound source processing apparatus having the audio interface.

Audio, Interface, Composite, MP3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio interface capable of processing a plurality of channels,

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the configuration of a sound source processing apparatus for processing ordinary audio data. Fig.

2 illustrates a configuration of an audio interface according to the related art;

3 is a block diagram of a sound source processing apparatus having a plurality of audio interfaces according to the related art.

4 is a schematic view of a sound source processing apparatus for processing audio data according to a preferred embodiment of the present invention.

5 is a diagram illustrating a configuration of an audio interface according to a preferred embodiment of the present invention.

Description of the Related Art [0002]

10, 100: Host

30, 200: Audio interface

50, 300: Audio codec

60: microphone

70: Speaker

32, 210: Receive buffer

34: Transmission buffer

220: Transmission buffer 1

222: Transmission buffer 2

230: Receive synthesizer

240: transmission synthesizer

36, 250: converter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sound source processing, and more particularly, to an audio interface capable of processing a plurality of channels and a sound source processing apparatus having the audio interface.

In recent years, the MP3 function has been added to portable electronic devices such as cellular phones and personal digital assistants (PDAs) such as PCS, and audio functions are being enhanced. Particularly, a method of managing audio data of a mobile device such as a mobile phone has been developed variously. For example, there is a method of simply playing only MP3 files, compositing two music pieces, playing MP3 files in background music during a telephone call, playing music at the same time as performing a recording function, and the like.

However, in order to implement a function of synthesizing and processing audio data in real time in a device for processing audio data (hereinafter, referred to as a 'sound source processing device'), A high-specification audio codec capable of processing data in real time is required. In addition, the hardware structure of the sound source processing device for implementing the above-described functions is complicated, and a problem of requiring a lot of application software has arisen.

FIG. 1 is a diagram illustrating a configuration of a sound source processing apparatus for processing conventional audio data. FIG. 2 is a diagram illustrating a configuration of an audio interface according to the related art. FIG. Fig. 2 is a diagram showing the configuration of a sound source processing apparatus according to the present invention.

1, a typical sound source processing apparatus includes a host 10, an audio interface 30, an audio codec 50, a microphone 60, and a speaker 70 for controlling an audio application such as a main controller .

The audio interface 30 is a device for relaying data transmission / reception between the host 10 and the audio codec 50. That is, the audio interface 30 converts the data received from the host 10 into a format that can be processed by the audio codec 50 and transmits the converted data to the audio codec 50, (10), and transmits the converted data to the host (10). Accordingly, the audio codec 50 processes the audio data received from the audio interface 30, outputs it using an output device such as the speaker 70, and outputs the audio data input through the input device such as the microphone 60 And transmits the processed data to the host 10 through the audio interface 30.

Referring to FIG. 2, a prior art audio interface 30 includes a receive buffer 32, a transmit buffer 34, and a converter 36. The reception buffer 32 is a storage means for temporarily storing the audio data received from the audio codec 50 to the host 10 so that the audio data received from the host 10 is temporarily stored And is stored. As the reception buffer 32 and the transmission buffer 34, a FIFO (First In First Out) type storage medium such as a queue may be used.

The converter 36 converts the audio data transmitted from the host 10 and stored in the transmission buffer into data of a format that can be processed by the audio codec 50 and inputs the audio data to the audio codec 50, Converts the data into data of a format that can be processed by the host 10, and stores the converted data in the reception buffer 32.

The audio interface 30 according to FIG. 2 can process only one audio data since it has only one transport channel (a channel for transmitting audio data from the host 10 to the audio codec 50). Accordingly, in order to output two or more audio data through the audio codec 50 using the audio interface 30 according to the related art, two or more audio interfaces 30 must be provided as shown in FIG.

Referring to FIG. 3, one transmission channel is provided between the host 10 and each of the audio interfaces 30-1 and 30-2, and one audio interface 30-1 is provided between the host 10 and each of the audio interfaces 30-1 and 30-2. (That is, a channel through which audio data is transmitted from the audio codec 50 to the host 10). 3, it is possible to output two or more audio data, but it is required to have the audio interface 30 as many as the number of required transmission channels, There is still a problem of using an expensive audio codec because audio data can be synthesized.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an audio interface capable of processing audio data through a plurality of transmission channels using one audio interface and a sound source processing apparatus having the audio interface It has its purpose.

It is another object of the present invention to provide an audio interface capable of processing a plurality of channels that do not need to perform synthesis of audio data in an audio codec by having a function of synthesizing audio data received through a plurality of channels, And to provide a processing apparatus.

Other objects of the present invention will become more apparent through the following preferred embodiments.

According to a first aspect of the present invention, there is provided an audio interface coupled to a host and an audio codec, the audio interface including: a plurality of transmission buffers for storing audio data received through the respective transmission channels from the host; A transmission synthesizer for synthesizing and outputting a plurality of audio data stored in the plurality of transmission buffers; And a converter for converting the synthesized audio data input from the transmission synthesizer into a format corresponding to the audio codec and outputting the converted audio data.

Here, the transmission combiner may perform addition operation on a plurality of received audio data.

A receiving buffer for storing audio data transmitted through one receiving channel to the host; And a reception synthesizer for synthesizing the audio data stored in one of the transmission buffers and the audio data input from the converter and storing the synthesized audio data in the reception buffer.

The receiving combiner may add the audio data stored in the transmission buffer and the audio data input from the converter.

And an audio interface coupled to the host and the audio codec, the audio interface comprising: a plurality of transmission buffers for storing audio data received over each transmission channel from the host; A transmission synthesizer for synthesizing and outputting a plurality of audio data stored in the plurality of transmission buffers; A receiving buffer for storing audio data transmitted through one receiving channel to the host; And a controller for converting the synthesized audio data input from the transmission synthesizer into a format corresponding to the audio codec and transmitting the converted audio data to the audio codec or converting the audio data input from the audio codec into a format corresponding to the host, A converter to output; And a receiving synthesizer for synthesizing the audio data stored in one of the transmission buffers and the audio data input from the converter and storing the synthesized audio data in the reception buffer.

According to another aspect of the present invention, there is provided a sound source processing apparatus comprising: a host for controlling an audio application; An audio interface for synthesizing and converting a plurality of audio data received from the host through a plurality of transmission channels; And an audio codec for synthesizing and converting audio data input from the audio interface and outputting audio data input through a speaker.

Here, the audio codec transmits audio data input from a sound source input device to the audio interface, and the audio interface synthesizes the input audio data and at least one audio data received from the host, Can be transmitted to the host.

Further, the audio interface can add and synthesize a plurality of audio data.

Hereinafter, a plurality of channel-capable audio interfaces and a processing method thereof according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding The same reference numerals will be assigned to the constituent elements, and redundant explanations thereof will be omitted.

In describing the audio interface according to the present invention, an apparatus for processing audio data including an audio interface is referred to as a sound source processing apparatus, and the sound source processing apparatus is provided in a mobile terminal such as a mobile phone . Of course, a portable electronic device such as a PDA or a portable multimedia player (PMP) equipped with a sound source processing device including an audio interface according to the present invention may also be applied to the mobile terminal in the following description. It will become self-evident.

For the sake of convenience, all data formats including digital and analog that can be outputted as sound are referred to as audio data.

FIG. 4 is a schematic view of a sound source processing apparatus for processing audio data according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a configuration of an audio interface according to a preferred embodiment of the present invention.

4, the sound source processing apparatus according to the present invention includes a host 100, an audio interface 200 having a plurality of transmission channels and a plurality of reception channels, an audio codec 300, a microphone 60, And a speaker 70.

The host 100 may be an application processor that controls the operation of an audio application (for example, an MP3 player), for example, a main controller of the sound source processing apparatus or a sound reproduction of the sound source. That is, the host 100 transmits corresponding audio data to the audio interface 200 through a transmission channel in order to output the audio data reproduced according to the execution of the audio application by using a speaker, And receives the data from the audio interface 200 through the receive channel and processes the data according to the audio application.

The audio interface 200 converts audio data received from the host 100 into data of a format that can be processed by the audio codec 300 and provides the audio data. Particularly, the audio interface 200 according to the present invention synthesizes two audio data received from two channels from the host 100 and outputs audio data synthesized and converted by the audio codec 300 using one channel send.

The audio interface 200 according to the present invention has at least one reception channel and a plurality of transmission channels. Although only two transport channels are shown in the figure, it will be clear from the following description that three or more transport channels may be included.

5, the audio interface 200 includes a reception buffer 210, transmission buffers 220 and 222 according to a number of transmission channels, a transmission combiner 240 for a transmission channel, and a receiving combiner 230 and a transducer 250.

The transmission combiner 240 combines the audio data temporarily stored in each of the transmission buffers 220 and 222, transmitted from the plurality of transmission channels, and transmits the combined audio data to the converter. For example, the transmission synthesizer 240 combines music data according to the execution of the MP3 player and voice data according to a voice call into one audio data, and transmits the combined audio data to the converter 250. The converter 250 converts the synthesized audio data into a predetermined format and provides the converted audio data to the audio codec 300 so that the audio codec 300 can reproduce music and play according to the MP3 play using a sound output device such as the speaker 70. [ Can be output. It will be apparent to those skilled in the art that the audio codec 300 outputs audio data using the speaker 70 or the like in the sound source processing apparatus, and thus a detailed description thereof will be omitted.

Therefore, the sound source processing apparatus according to the present invention can process audio data through a plurality of transmission channels using one audio interface 200, and the audio codec 300 is required to have a function of synthesizing audio data separately There is no.

The reception combiner 230 performs a function of combining input data input from a sound source input device such as the microphone 60 and output data received from the host 100 and output through the speaker 70. That is, when the music is played together with the recording function, the reception synthesizer 230 synthesizes the audio data input through the microphone and the audio data stored in the transmission buffer 220 for music reproduction to perform the recording function. For example, when a telephone conversation is performed while the MP3 player is being executed, the receiver synthesizer 230 can transmit voice and MP3 music along with the call to the other party. Although the receiving combiner 230 is shown receiving audio data only from one transport channel, it may receive more than two audio data from two or more transport channels and combine it with the audio data received from the audio codec 300 It is natural that it is possible.

Here, the transmitting combiner 240 and the receiving combiner 230 may transmit the audio data directly to the converter 250 or the host 100 without receiving the audio data when receiving only one audio data. The transmission combiner 240 and the receiving combiner 230 may determine whether data is combined according to the control signal transmitted from the host 100. For example, when a call application is executed while the MP3 player is running, the host 100 first transmits an instruction to synthesize the two audio data to the reception synthesizer 230 and / or the transmission synthesizer 240 .

Alternatively, the transmission synthesizer 240 and the reception synthesizer 230 may recognize that audio data is input from a plurality of channels without receiving a separate control signal from the host 100, and when a plurality of audio data is input Only synthesis may be performed.

The data that the audio interface 200 receives from the host 100 or transmits to the host 100 may be PCM (Pulse Code Modulation) data. Accordingly, the transmission synthesizer 240 and the reception synthesizer 230 can synthesize the two audio data through the two's compliment addition operation of the PCM data. Of course, even when the data is not PCM data, it is needless to say that the transmission synthesizer 240 and the reception synthesizer 230 can synthesize a plurality of audio data by addition operation, and in addition to the addition operation, It will be obvious that the same can be applied.

It is needless to say that the present invention is not limited to the above-described embodiment, and many modifications may be made by those skilled in the art within the scope of the present invention.

As described above, according to the present invention, it is possible to provide an audio interface capable of processing audio data through a plurality of transmission channels using one audio interface, and a sound source processing apparatus having the audio interface have.

In addition, since there is no need to perform synthesis of audio data in an audio codec by having a function for synthesizing audio data in which one audio interface is received on a plurality of channels, the hardware structure of the sound source processing apparatus is simplified, There is no need to provide a codec and the manufacturing cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And changes may be made without departing from the spirit and scope of the invention.

Claims (8)

An audio interface coupled with a host and an audio codec, A plurality of transmission buffers for storing audio data received through the respective transmission channels from the host; A transmission synthesizer for synthesizing and outputting a plurality of audio data stored in the plurality of transmission buffers; And And a converter for converting the synthesized audio data input from the transmission synthesizer into a format corresponding to the audio codec and outputting the converted audio data. Claim 2 has been abandoned due to the setting registration fee. The method according to claim 1, Wherein the transmission synthesizer adds the received plurality of audio data. The method according to claim 1, A receiving buffer for storing audio data transmitted through one receiving channel to the host; And Further comprising a receiving synthesizer for synthesizing the audio data stored in one of the transmission buffers and the audio data input from the converter and storing the synthesized audio data in the reception buffer. Claim 4 has been abandoned due to the setting registration fee. The method of claim 3, Wherein the reception synthesizer adds the audio data stored in the transmission buffer and the audio data input from the converter. An audio interface coupled with a host and an audio codec, A plurality of transmission buffers for storing audio data received through the respective transmission channels from the host; A transmission synthesizer for synthesizing and outputting a plurality of audio data stored in the plurality of transmission buffers; A receiving buffer for storing audio data transmitted through one receiving channel to the host; And a controller for converting the synthesized audio data input from the transmission synthesizer into a format corresponding to the audio codec and transmitting the converted audio data to the audio codec or converting the audio data input from the audio codec into a format corresponding to the host, A converter to output; And And a receiving synthesizer for synthesizing the audio data stored in one of the transmission buffers and the audio data input from the converter and storing the synthesized audio data in the reception buffer. A sound source processing apparatus comprising: A host controlling an audio application; An audio interface for synthesizing and converting a plurality of audio data received from the host through a plurality of transmission channels; And And an audio codec for synthesizing and converting audio data input from the audio interface and outputting audio data input through a speaker. The method according to claim 6, The audio codec transmits audio data input from a sound source input device to the audio interface. The audio interface synthesizes the input audio data and at least one audio data received from the host, Wherein the audio signal is transmitted to the audio processing unit. Claim 8 has been abandoned due to the setting registration fee. The method according to claim 6, Wherein the audio interface is a combination of a plurality of audio data and synthesizing the audio data.

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