KR20070068854A - Personal computer having a digtal amplifier module and the 5.1channel controlling method - Google Patents

Abstract

A PC equipped with a digital amplifier module and a method for controlling 5.1channel of the digital amplifier module are provided to completely output 5.1channel digital audio data without connecting to a receiver of an A/V device. An ADC(Analog/Digital Converter)(102) converts only a 5channel signal into a digital signal among the 5.1channel output from an audio codec IC(10). A pulse width modulator(104) modulates a pulse width of the converted signal. A digital amplifier(106) amplifies the modulated signal to a predetermined level. The first LPF(Low Pass Filter)(108) passes only the desired signal by removing the signal included in a predetermined band from the amplified signal. The second LPF(112) processes only the 1channel analog signal output from the audio codec IC. A controller(110) controls each component and is connected to a mute switch(114) for selectively restricting output of the 1channel analog signal passing the second LPF.

Description

Personal computer having a Digtal amplifier module and the 5.1channel controlling method

1 is a block diagram for implementing a 5.1-channel sound using a personal computer in general.

2 is a perspective view illustrating a digital amplifier module mounted on an upper side of a main board of a personal computer according to an exemplary embodiment of the present invention.

3 is a block diagram of the digital amplifier module of FIG.

4 is a flowchart illustrating a 5.1 channel control method of a digital amplifier module according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Mainboard. 20: interface unit.

100: digital amplifier module. 102: A / D conversion unit.

104: pulse width modulator. 106: digital amplifier.

108: first low pass filter. 110: control unit.

112: second low pass filter. 114: Mute switch.

The present invention relates to outputting a 5.1-channel digital signal from a personal computer. In particular, the digital computer controls the amplification / output of 5.1-channel digital sound data by the personal computer itself without being connected to a receiving module of an A / V device. A personal computer having an amplifier module and a 5.1 channel control method for a digital amplifier module thereof.

Personal computers (PCs) have evolved into complex multimedia devices in which audio, video, TV, game consoles, communication devices, etc. are integrated beyond simple operations and databases. In particular, in the field of audio, a new concept of storage and playback has been developed in response to the digital age, and users can now select and listen to various music and movie data with excellent sound quality.

In addition, audio functions in a personal computer are gradually provided with various functions, and may be used in connection with video, and karaoke functions may be provided. In addition, the user can select and listen to sound quality by the equalizer function, thus providing a role as a more professional sound device.

In order to output sound through such a personal computer, the sound source integrated element 3 under the control operation of the central processing unit 2 should be provided as shown in FIG. The sound source integrated device 3 reads and reproduces the sound source data stored in the predetermined memory 5, and the reproduced sound source data is converted into an analog signal by the audio codec IC 10, and then the speaker 11 Is printed through). Of course, even when viewing the image data according to the video file, the sound data separated from the image data is controlled by the central processing unit 2 or the sound source integrated element (3) and converted into an analog signal in the audio codec IC (10) After that is output through the speaker (11). The same method is used to output not only sound source data (for example, MP3, etc.) stored in the memory 5, but also sound source data recorded on a compact disc (CD), which is a storage medium.

However, despite the fact that the personal computer has been improved as a multimedia device, it is true that many people still rely on A / V devices that support the home theater function in order to use music or movies that support realistic 5.1-channel sound. .

That is, since the personal computer supports 5.1 channel sound data, the speaker is connected to the output terminal for the 5.1 channel, but in this case, the amplifier function for the analog sound signal outputted through the speaker is insufficient. Computer alone was absolutely inadequate to enjoy realistic 5.1-channel stereo sound. Moreover, it was difficult to listen to movies or music files with near-original sound.

Therefore, most personal computer users still receive the audio data from the personal computer and the A / V device while the 5.1-channel output terminal and the receiving module of the A / V device are connected by separate connectors. The audio data received by the amplifier stage provided by the amplifier is amplified to a predetermined level to listen to the 5.1 channel audio data output. In addition, recently, a communication method such as S / PDIF (Sony / Philips Digital Signal Rule) has been applied, allowing users to enjoy 5.1-channel sound with a personal computer.

However, when a separate A / V device is used or when a separate receiver is to be installed for the S / PDIF communication method, the purchase cost increases and the installation is not smooth when the installation space is small. . Since a recent personal computer is also used as an interior accessory, attaching a separate receiver to the personal computer externally as described above in order to enjoy 5.1 channels results in contrary to the needs of the user.

Accordingly, an object of the present invention is a personal computer equipped with a digital amplifier module capable of providing a 5.1-channel digital sound data with only a personal computer without a separate receiver connected to the personal computer, and the 5.1-channel of the digital amplifier module. To provide a control method.

The personal computer equipped with the digital amplifier module of the present invention for achieving the above object is controlled by the central processing unit when the 5.1-channel music or movie data provided to the personal computer is reproduced in the reproduction program. And an audio codec IC for converting and outputting an analog signal for 5.1 channel, and receiving the 5.1 channel analog signal from the audio codec IC in a state of being interfaced with the audio codec IC and converting it into a digital signal. Characterized in that it comprises a digital amplifier module unit for outputting an analog 1-channel signal through the speaker.

The digital amplifier module unit includes an A / D conversion unit for converting and outputting only 5 channel signals from among 5.1 channel signals output from the audio codec IC, and a pulse width modulator for modulating a pulse width of the converted signal. And a digital amplifier for amplifying the modulated signal to a predetermined level, a first low pass filter for removing a signal included in a predetermined band from the amplified signal and passing only a desired signal, and being output from the audio codec IC. And a second low pass filter for processing only one channel analog signal, and a control unit for controlling the components.

The control unit is connected to the mute switch to selectively suppress the output of the one-channel analog signal output through the second low pass filter.

In addition, the personal computer equipped with the digital amplifier module of the present invention for achieving the above object is to convert the 5.1-channel digital signal of the 5.1-channel music or movie data provided to the personal computer into a 5.1-channel analog signal It is supported by a main board of a personal computer having a codec IC and at least one support pin installed at a predetermined position of the main board, and is spaced apart from the main board by a predetermined distance, and is provided with a 5.1-channel analog signal from the audio codec IC. It is characterized by consisting of a digital amplifier module that is applied to receive and process through the 5 channel digital signal and 1 channel analog signal respectively.

In addition, the 5.1-channel control method of the digital amplifier module in the personal computer of the present invention for achieving the above object is to convert the 5.1-channel digital signal selected by the user request into a 5.1-channel analog signal by the audio codec IC. A first conversion step, a second conversion step of converting an analog signal of five channels among the 5.1 channel analog signals into a five channel digital signal, and a five channel digital signal converted by the second conversion step and the remaining one channel analog signal And outputting a signal.

The second converting step includes converting the 5-channel analog signal into a digital signal, modulating the converted digital signal to a predetermined level by a pulse width modulation method, and amplifying the modulated digital signal. Amplifying step, and passing through only the desired band from the amplified digital signal to provide to the speaker.

The output of the one-channel analog signal is selectively suppressed, so that only the digitally converted five-channel signal can be output.

According to the present invention having the above-described configuration, 5.1-channel digital sound data can be generated using only a personal computer without applying a separate A / V device or a communication method such as S / PDIF (Sony / Phillips Digital Signal Rule). It can be provided to output a three-dimensional home theater sound.

Hereinafter, a preferred embodiment of a digital amplifier module according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

2 illustrates a configuration in which a digital amplifier module is mounted on an upper side of a main board of a personal computer according to an embodiment of the present invention, and FIG. 3 is a block diagram of the digital amplifier module of FIG. 2.

As shown in these figures, the digital amplifier module 100 according to the present invention is designed in the form of a PCB substrate and is located on the upper side of the main board 1 of the personal computer. Two or more (preferably four) support pins 30 are provided on the main board 1, and the digital amplifier module 100 is physically spaced apart by a predetermined interval by the support pins 30. do. In addition, the audio codec IC 10 provided in the motherboard 1 and the digital amplifier module 100 are transmitted to each other so that a signal output from the main board 1 is transmitted to the digital amplifier module 100. The interface unit 20 should be provided. In order to dissipate heat generated when the digital amplifier module 100 is driven to the outside, the digital amplifier module 100 may be configured in close proximity to a blowing fan (not shown) provided in the personal computer. In other words, the digital amplifier module 100 is installed on the main board 1, but the mounting portion is preferably configured to be close to the direction side in which the blowing fan is installed.

The digital amplifier module 100 receives an A / D conversion unit 102 that receives a 5-channel signal from among the 5.1-channel signals applied through the interface unit 20 from the audio codec IC 10 and converts it into a digital signal. ), A pulse width modulator 104 for modulating a pulse width of the converted signal, a digital amplifier 106 for amplifying the modulated signal to a predetermined level, and a predetermined band among the amplified signals. The first low pass filter 108 removes the signal and passes only the desired signal. In addition, a second low pass filter 112 is configured to receive the remaining one channel signal from the 5.1 channel signals output from the audio codec IC 10 and pass only a desired signal. Therefore, a total of six channels of signals are output through the speaker through the first low pass filter 108 and the second low pass filter 112. In addition, the speaker is provided with a 5.1-channel speaker to provide 5.1-channel sound, one of the speakers is configured to output the bass through the second low pass filter (112).

Operating power must be supplied for normal operation of the digital amplifier module 100. The operating power is 5V, 12V, 25V power through the power supply (not shown) of the personal computer, respectively. In addition, the oscillator 118 is configured to provide a clock frequency to the rectifier 116 for rectifying power supplied from the power supply device, the A / D converter 102, and the pulse width modulator 104.

It has a control unit 110 for the digital amplifier module to control the components as a whole, the control unit 110 is configured to suppress the output of the one-channel signal to the speaker through the second low pass filter 112 The mute switch 114 is controlled. In addition, the control unit 110 is connected to the power S / W to control the on / off of the digital amplifier module 100.

Hereinafter, a process of controlling and outputting a 5.1 channel signal by the digital amplifier module of the present invention having the above configuration will be described in detail.

When the user turns on the personal computer and selects a music file or a movie file that supports 5.1 channel sound, the selected file is ready for playback in accordance with the execution of the audio playback program or video related program (step 100).

Then, the audio codec IC 10 converts the 5.1-channel digital signal for the selected file into a 5.1-channel analog signal, and the converted 5.1-channel signal is separated from the main board 1 by the digital amplifier module unit 100. (Step 102).

The digital amplifier module unit 100 independently processes the 5 channel analog signal and the 1 channel analog signal among the 5.1 channels. First, only the 5 channel analog signal is applied to the A / D converter 102 in step 104. Let's do it. At this time, the A / D converter 102 is operated by the clock frequency provided by the oscillator.

The A / D converter 102 converts the 5-channel analog signal into a 5-channel digital signal, and provides the converted 5-channel digital signal to the pulse width modulator 104. In step 106, the pulse width modulator 104 performs a modulation function at a predetermined level according to information such as a volume or a tone specified by a user. The 5-channel digital signal thus modulated is provided to the digital amplifying unit 106 and amplified to a predetermined level value based on the volume information designated by the user (step 108).

Since the amplified digital signal is amplified into a digital signal unlike the analog amplification performed in the amplifier stage provided in the conventional personal computer, the signal quality is improved. In other words, since the digital amplifier module 100 of the present invention amplifies the digital signal converted by the A / D converter 102 into a digital signal without converting the analog signal into an analog signal, the digital signal is converted into an analog signal. Since a D / A converter for amplifying is not provided, the configuration is simplified.

The five-channel signal amplified by the digital amplifier 106 to a predetermined level is transferred to the first low pass filter 108, and the first low pass filter 108 is included in an undesired band as in step 110. After the sound is removed, the speaker outputs it. Therefore, the separation of sound is assured and clearer sound can be realized than analog amplification.

In this case, the 5-channel digital signal may be output together with the 1-channel analog signal (step 112), or only the 5-channel digital signal except for the 1-channel analog signal may be output (step 124).

That is, in step 102, one channel analog signal from the 5.1 channels provided from the audio codec IC 10 is transferred to the second low pass filter 112 without going through the digital amplifier module 100 and proceeding to step 120. do. The one-channel analog signal is a signal for reinforcing only a strong bass portion that normally appears in the first half of the signal.

Accordingly, when the one-channel signal through the second low pass filter 112 is output through the speaker together with the five-channel signal in step 112, the mute switch 114 is not operated in step 122. to be. When the 5.1 channel is output, the stereoscopic sound by the digital signal can be enjoyed, and since the bass part is reinforced and output, the realism is also excellent.

However, when the mute switch 114 is turned on in operation 122, the one-channel signal may be suppressed by the user. That is, when the user drives the mute switch 114 on, the controller 110 may prevent the one-channel signal applied to the second low pass filter 112 from being output to the speaker. Therefore, as in step 124, the user is provided with only the digital amplified signal consisting of five channels except for the signal separated by the bass.

As described above, the present invention described in the above embodiments enables the user to faithfully enjoy 5.1-channel digital sound using only a personal computer without using an A / V device provided to enjoy 5.1-channel home theater sound. do. In addition, it is possible to selectively suppress the bass-reinforced signal of one channel, thereby widening user selection.

As described above, according to the present invention, it is possible to enjoy music or movies supporting 5.1-channel digital sound only with a personal computer. This eliminates the hassle of connecting A / V devices or installing receivers to support conventional 5.1 channel sound on a personal computer, and also enables users to enjoy 5.1 channels with only a personal computer even when the installation location is small. There is.

Moreover, equipment corresponding to a home theater package can be used without purchasing expensive A / V equipment.

As described above, the present invention has been described with reference to the illustrated embodiment, which is merely exemplary, and those having ordinary skill in the art to which the present invention pertains may use various modifications without departing from the spirit and scope of the present invention. It will be apparent that other variations and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (9)

An audio codec IC for converting and outputting 5.1 channel music or movie data provided to a personal computer to a personal computer according to a user's request, converting the 5.1 channel analog signal to a 5.1 channel analog signal according to the control operation of the central processing unit; And a digital amplifier module unit which receives the 5.1-channel analog signal from the audio codec IC and converts it into a digital signal and outputs the remaining analog 1-channel signal through a speaker while being interfaced with the audio codec IC. Personal computer equipped with a digital amplifier module, characterized in that. The method of claim 1, The digital amplifier module unit includes an A / D converter for converting only 5 channel signals from among 5.1 channel signals output from the audio codec IC into a digital signal, a pulse width modulator for modulating a pulse width of the converted signal; A digital amplifier for amplifying the modulated signal to a predetermined level, a first low pass filter for removing a signal included in a predetermined band from the amplified signal and passing only a desired signal, and one channel output from the audio codec IC And a second low pass filter for processing only an analog signal, and a control unit for controlling the components. The personal computer with a digital amplifier module according to claim 2, wherein the control unit is connected with a mute switch to selectively suppress the output of the one-channel analog signal output through the second low pass filter. A main board of a personal computer in which an audio codec IC is configured to convert a 5.1-channel digital signal of 5.1-channel music or movie data provided to a personal computer into a 5.1-channel analog signal; It is supported by at least one support pin installed at a predetermined position of the main board and is spaced apart from the main board by a predetermined distance. A personal computer equipped with a digital amplifier module, characterized in that each processing is configured to output a digital amplifier module through the speaker. The method of claim 4, wherein The audio codec IC and the digital amplifier module is a personal computer having a digital amplifier module, characterized in that the interface is connected via a signal transmission cable. A first conversion step of converting a 5.1 channel digital signal selected by a user request into a 5.1 channel analog signal by an audio codec IC, A second conversion step of converting an analog signal of five channels among the 5.1 channel analog signals into a five channel digital signal; And outputting the five-channel digital signal converted by the second conversion step and the remaining one-channel analog signal. The method of claim 6, The second conversion step, Converting the 5-channel analog signal into a digital signal; Modulating the converted digital signal to a predetermined level by a pulse width modulation method; An amplifying step of amplifying the modulated digital signal; 5.1 channel control method of a digital amplifier module, characterized in that the step of passing through the desired band from the amplified digital signal provided to the speaker. The method of claim 6, 5.1 channel control method of the digital amplifier module, characterized in that the one-channel analog signal is selectively controlled to suppress the output. The method according to claim 6 or 8, 5.1-channel control method of the digital amplifier module, characterized in that only the digitally converted five-channel signal is output.

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