TWI407769B - Method for controlling audio gain of a mobile phone and mobile phone capable of controlling audio gain thereof - Google Patents

Abstract

A method for controlling audio gain of a mobile phone includes the steps of determining whether the mobile phone is in a speaker mode, determining whether a present playback file is a designated format to generate a judgment result when the mobile phone is in the speaker mode, determining whether to start an automatic gain control function for adjusting the audio gain of the present playback file according to the judgment result. When the present playback file is a first designated audio format or a first designated video format, start the automatic gain control function.

Description

Method of controlling the volume gain of a mobile phone and a mobile phone capable of controlling volume gain

The invention relates to a method for controlling the volume gain of a mobile phone and a mobile phone capable of controlling the volume gain, in particular, when the mobile phone system is in the speaker mode, determining whether a current play file is in a specific format to determine whether to activate a phone. Automatic gain control function method and mobile phone.

In the modern information society where the wireless communication network is booming, mobile phones have become one of the most commonly used communication tools for the public. Mobile phones allow users to communicate wirelessly anytime, anywhere, and easily communicate voice. At present, mobile phones provide more and more applications, and users can use mobile phones to realize multimedia functions such as watching movies, playing music, watching news, recording and recording.

Since the size of a mobile phone is usually small, the size of the speaker is usually limited to a limited space and is not too large, which also causes the playback volume of the mobile phone to be limited. Different audio file sources have different volume levels and different dynamic distribution ranges, so the speaker of the mobile phone is difficult to meet all the requirements. Therefore, when the volume of the file source played by the mobile phone is too small, the output of the speaker is hard to be heard, which is more serious in noisy environments.

Accordingly, it is an object of the present invention to provide a method of controlling the volume gain of a mobile phone and a mobile phone capable of controlling the volume gain to solve the above problems.

The present invention discloses a method of controlling the volume gain of a mobile phone. The method includes: determining whether the mobile phone is in the speaker mode; determining whether the current play file is in a specific format to generate a determination result when determining that the mobile phone is in the speaker mode; and determining whether to activate according to the determination result An automatic gain control function to adjust the volume gain of the currently playing file. When the current play file is the first specific video format (eg, wmv format, mp4 format, avi format, 3gp format, 3g2 format, and m4v format) or the first specific audio format (eg, wav format, mp3 format, and mid format) The automatic gain control function is activated.

The invention further discloses a mobile phone capable of controlling volume gain. The mobile phone includes an audio codec unit, an operation amplification unit, a sound output device, a detection and determination unit, and a micro processing unit. The audio codec unit is used to process a currently playing file. The operation amplifying unit is coupled to the audio codec unit, and includes an automatic gain controller and an amplifier, wherein the automatic gain controller is used to adjust the volume gain of the currently playing file, and the amplifier is coupled to the automatic gain controller. To zoom in on the volume gain of the currently playing file to a fixed multiple. The sound output device is coupled to the operational amplification unit. When the mobile phone is in the speaker mode, the mobile phone uses the sound output device to play the current play file. The detecting and determining unit is configured to determine whether the current playing file is in a specific format when the mobile phone system is in the speaker mode to generate a determination result. The micro processing unit is coupled to the audio codec unit, the operational amplification unit, and the detection and determination unit, and is configured to determine whether to activate an automatic gain control function of the automatic gain controller according to the determination result.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a first embodiment of a mobile phone 100 capable of controlling volume gain according to the present invention. As shown in FIG. 1, the mobile phone 100 includes, but is not limited to, a micro processing unit 110, a detection and determination unit 120, an audio codec unit 130, an operational amplification unit 140, and a sound output device 170. The audio codec unit 130 is coupled to the micro processing unit 110 for processing a current play file PF1. The operation amplifying unit 140 is coupled to the audio codec unit 130, and includes an automatic gain controller 150 and an amplifier 160. The automatic gain controller 150 is configured to adjust the volume gain of the currently playing file PF1 to generate the current play file PF2. The amplifier 160 is coupled to the automatic gain controller 150 for amplifying the volume gain of the currently playing file PF2 to a fixed multiple to generate the current play file PF3. The detecting and determining unit 120 is configured to determine whether the current playing file PF1 is in a specific format to generate the determination result DR1 when the mobile phone system is in the speaker mode. The micro-processing unit 110 is coupled to the audio codec unit 130, the operational amplification unit 140, and the detection and determination unit 120 for generating the control signal SC to the automatic gain controller 150 according to the determination result DR1 to determine whether to start the automatic gain. The automatic gain control function of the controller 150. The sound output device 170 can be a speaker. How the micro processing unit 110 determines whether to activate the automatic gain control function of the automatic gain controller 150 according to the file format of the currently playing file PF1 will be described in detail in the following embodiments.

In the present embodiment, the detection and determination unit 120 and the audio codec unit 130 are disposed outside the micro processing unit 110, but the present invention is not limited thereto. In other embodiments, the detection and determination unit 120 and the audio codec unit 130 may also be disposed inside the micro processing unit 110. Please refer to FIG. 2, which is a schematic diagram of a second embodiment of a mobile phone 200 capable of controlling volume gain according to the present invention. In FIG. 2, the architecture of the mobile phone 200 is similar to that of the mobile phone 100 shown in FIG. 1, and the difference is that the detection and determination unit 220 of the mobile phone 200 and the audio codec unit 230 are set in the microphone. The interior of the processing unit 210. In other words, the detection and determination unit 220 and the audio codec unit 230 and the micro processing unit 210 are disposed on the same integrated circuit, which is also within the scope of the present invention.

Please refer to Figure 3, which is a schematic diagram showing the volume distribution characteristics of playback files in different formats. In Fig. 3, the left side represents the volume distribution characteristics of a file of a specific format, and the right side represents the volume distribution characteristic of a file of a non-specific format. The "specific format" referred to herein can be further divided into two types - a first specific video format and a first specific audio format, wherein the first specific video format includes wmv format, mp4 format, avi format, 3gp format, 3g2 format or The m4v format, while the first specific audio format includes the wav format, the mp3 format, or the mid format, which are commonly found in the voice portion of a movie play file, a news play file, or a satellite navigation file. As can be seen from Figure 3, the dynamic distribution of files in a specific format is wider, and the average volume falls at -27 dB; the dynamic distribution of files that are not in a specific format (such as a general music play file) is small. And the average volume falls at -10dB, which is many times higher than the average volume of a particular format file (-10dB>-27dB). At this time, if the mobile phone uses the same speaker to play the above-mentioned specific format and non-specific format files, it will be found that the voice part of the movie play file, news play file or satellite navigation file often appears very small and not easy to hear clearly. And the general music play files will not have these problems. In order to solve this problem, the present invention proposes a mobile phone 100, 200, which can decide whether to activate the automatic gain control function of the automatic gain controller 150 according to the file format of the currently playing file PF1.

Please refer to FIG. 4, which is a flow chart of an operation example of a method for controlling the volume gain of a mobile phone according to the present invention, which includes the following steps (the following steps are not limited to be performed according to the sequence shown in FIG. , you can do the appropriate modulation to get the desired result): Step 402: Start.

Step 404: Determine whether the mobile phone is in the speaker mode. When the mobile phone is in the speaker mode, step 406 is performed; otherwise, step 410 is performed.

Step 406: Determine whether the currently playing file is in a specific format to generate a judgment result. When the result of the judgment indicates that the current play file is in the specific format, step 408 is performed; otherwise, step 410 is performed.

Step 408: Start the automatic gain control function.

Step 410: The automatic gain control function is not activated.

For each step shown in Figure 4, please refer to the components shown in Figure 1 or Figure 2 to understand how each component operates. For the sake of brevity of the description, the steps in Figure 4 are The operation will not be described again. It should be noted that steps 404, 406 are performed by the detection and determination unit 120, 220, and steps 408, 410 are performed by the micro processing units 110, 210.

Please refer to FIG. 5, which is a flowchart of another operation example of the method for controlling the volume gain of a mobile phone according to the present invention. As shown in FIG. 5A, it includes, but is not limited to, the following steps: Step 402: Start.

Step 404: Determine whether the mobile phone is in the speaker mode. When the mobile phone is in the speaker mode, step 510 is performed; otherwise, step 410 is performed.

Step 510: Determine whether the current play file is the first specific video format to generate a first determination result. When the currently playing file is the first specific video format, step 408 is performed; otherwise, step 512 is performed.

Step 512: Determine whether the current play file is the first specific audio format to generate a second determination result. When the currently playing file is in the first specific audio format, step 408 is performed; otherwise, step 410 is performed.

Step 408: Start the automatic gain control function.

Step 410: The automatic gain control function is not activated.

As shown in FIG. 5B, it includes, but is not limited to, the following steps: Step 402: Start.

Step 404: Determine whether the mobile phone is in the speaker mode. When the mobile phone is in the speaker mode, step 520 is performed; otherwise, step 410 is performed.

Step 520: Determine whether the current play file is the first specific audio format to generate a first determination result. When the currently playing file is in the first specific audio format, step 408 is performed; otherwise, step 522 is performed.

Step 522: Determine whether the current play file is the first specific video format to generate a second determination result. When the currently playing file is the first specific video format, step 408 is performed; otherwise, step 410 is performed.

Step 408: Start the automatic gain control function.

Step 410: The automatic gain control function is not activated.

Note that the steps shown in FIGS. 5A and 5B are similar to the steps in FIG. 4, which are respectively modified embodiments of FIG. In FIG. 5A, the difference from the step of FIG. 4 is that the flow of FIG. 5A subdivides the step 406 of FIG. 4 into two steps (ie, steps 510-512); likewise, in FIG. 5B, The difference from the step of FIG. 4 is that the flow of FIG. 5B subdivides step 406 of FIG. 4 into two steps (ie, steps 520-522). It should be noted that the order of the steps for judging whether the currently playing file is the first specific video format or the first specific audio format is not a limitation of the present invention.

It should be noted that the steps of the above various processes are merely examples of the present invention, and are not intended to limit the present invention, and the method may further include other intermediate steps or may be omitted without departing from the spirit of the present invention. Combine several steps into a single step to make the appropriate changes.

The embodiments described above are only intended to illustrate the technical features of the present invention and are not intended to limit the scope of the present invention. As can be seen from the above, the present invention provides a mobile phone capable of controlling volume gain and a method of controlling the volume gain of a mobile phone. Since different audio file sources have different volume levels and different dynamic distribution ranges, it is difficult for the speaker of the mobile phone to meet all the requirements. Therefore, the mobile phone disclosed in the present invention determines whether to activate the automatic gain control function of the automatic gain controller by determining the file format of the currently playing file. When playing a general music file (that is, the above-mentioned non-specific format file), since the dynamic distribution range is small and the average volume is large, the micro processing unit does not need to activate the automatic gain control function of the automatic gain controller; When the voice part of a movie play file, a news play file or a satellite navigation file (that is, the file of a specific format mentioned above) is large, the micro processing unit must start the automatic gain control function because of its large dynamic distribution range and small average volume. Optimize the volume gain of the currently playing file. As a result, the mobile phone disclosed in the present invention does not have problems such as the output of the speaker. In addition, the automatic gain controller 150 and the amplifier 160 described above can use the same wafer without adding additional space for placement.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100, 200. . . mobile phone

110, 210. . . Micro processing unit

120, 220. . . Detection and judgment unit

130, 230. . . Audio codec unit

140. . . Operational amplification unit

150. . . Automatic gain controller

160. . . Amplifier

170. . . Sound output device

PF1, PF2, PF3. . . Currently playing the file

DR1. . . critical result

SC. . . Control signal

402-410, 510-512, 520-522. . . step

1 is a schematic diagram of a first embodiment of a mobile phone capable of controlling volume gain according to the present invention.

2 is a schematic diagram of a second embodiment of a mobile phone capable of controlling volume gain according to the present invention.

Figure 3 is a schematic diagram showing the volume distribution characteristics of playback files in different formats.

Figure 4 is a flow chart showing an example of the operation of one method of controlling the volume gain of a mobile phone according to the present invention.

Figure 5 (comprising Figures 5A and 5B) is a flow chart showing another example of the operation of the method of controlling the volume gain of a mobile phone.

100. . . mobile phone

110. . . Micro processing unit

120. . . Detection and judgment unit

130. . . Audio codec unit

140. . . Operational amplification unit

150. . . Automatic gain controller

160. . . Amplifier

170. . . Sound output device

PF1, PF2, PF3. . . Currently playing the file

DR1. . . critical result

SC. . . Control signal

Claims (18)

A method for controlling a volume gain of a mobile phone, comprising: determining whether the mobile phone is in a speaker mode; determining whether the current play file is in a specific format to determine whether the mobile phone is in the speaker mode Determining a result; and determining whether to activate an automatic gain control function according to the determination result to adjust a volume gain of the currently playing file. The method of claim 1, wherein the step of determining whether to activate the automatic gain control function according to the determination result comprises: starting the automatic display file when the current playback file is in the specific format; The gain control function; and when the judgment result indicates that the current play file is not in the specific format, the automatic gain control function is not activated. The method of claim 1, wherein the step of determining whether the current play file is the specific format comprises: determining whether the current play file is a first specific video format to generate a first determination result; The step of determining whether to activate the automatic gain control function according to the first determination result comprises: when the first determination result indicates that the current play file is the first specific video format, the automatic gain control function is activated. The method of claim 3, wherein the step of determining whether the current play file is the specific format further comprises: determining, when the first judgment result indicates that the current play file is not the first specific video format, Whether the current play file is a first specific audio format to generate a second determination result; and determining whether to activate the automatic gain control function according to the second determination result further includes: when the second determination result displays the current When the play file is in the first specific audio format, the automatic gain control function is activated; and when the second determination result indicates that the current play file is not the first specific audio format, the automatic gain control function is not activated. The method of claim 4, wherein the first specific video format is one of a wmv format, an mp4 format, an avi format, a 3gp format, a 3g2 format, and an m4v format, and the first specific audio format system It is one of wav format, mp3 format and mid format. The method of claim 1, wherein the step of determining whether the current play file is the specific format comprises: determining whether the current play file is a first specific audio format to generate a first determination result; The step of determining whether to activate the automatic gain control function according to the first determination result comprises: when the first determination result indicates that the current play file is the first specific audio format, the automatic gain control function is activated. The method of claim 6, wherein the step of determining whether the current play file is the specific format further comprises: determining, when the first judgment result indicates that the current play file is not the first specific audio format, Whether the current playback file is a first specific video format to generate a second determination result; and determining whether to activate the automatic gain control function according to the second determination result further includes: when the second determination result displays the current When the play file is the first specific video format, the automatic gain control function is activated; and when the second determination result indicates that the current play file is not the first specific video format, the automatic gain control function is not activated. The method of claim 7, wherein the first specific video format is one of a wmv format, an mp4 format, an avi format, a 3gp format, a 3g2 format, and an m4v format, and the first specific audio format system It is one of wav format, mp3 format and mid format. A mobile phone capable of controlling volume gain includes: an audio codec unit for processing a current play file; an operational amplifier unit coupled to the audio codec unit, comprising: an automatic gain controller, Adjusting the volume gain of the current playback file; and an amplifier coupled to the automatic gain controller for amplifying the volume gain of the current playback file to a fixed multiple; an audio output device coupled to the operational amplification unit When the mobile phone is in a speaker mode, the mobile phone uses the voice output device to play the current play file; and a detecting and determining unit is configured to use the mobile phone system in the speaker mode. Determining whether the current playback file is in a specific format to generate a determination result; and a micro processing unit coupled to the audio codec unit, the operational amplification unit, and the detection and determination unit for using the determination result A control signal is generated to determine whether to activate an automatic gain control function of the automatic gain controller. The mobile phone of claim 9, wherein the sound output device is a speaker. The mobile phone according to claim 9, wherein the micro processing unit, the audio codec, and the detecting and determining unit are disposed on the same integrated circuit. The mobile phone according to claim 9 , wherein the micro processing unit starts the automatic gain control function of the automatic gain controller when the judgment result indicates that the current play file is in the specific format; When the judgment result indicates that the current playback file is not in the specific format, the automatic gain control function of the automatic gain controller is not activated. The mobile phone of claim 9, wherein the detecting and determining unit is configured to determine whether the current playing file is a first specific video format to generate a first determination result; and the micro processing unit is And the automatic gain control function of the automatic gain controller is activated when the first determination result indicates that the current playback file is the first specific video format. The mobile phone according to claim 13 , wherein the detecting and determining unit is further configured to determine, according to the determining result, that the current playing file is not the first specific video format, determining whether the current playing file is a The first specific audio format is used to generate a second determination result; and the micro processing unit is further configured to activate the automatic gain controller when the second determination result indicates that the current playback file is the first specific audio format The automatic gain control function; and when the second determination result indicates that the current play file is not the first specific audio format, the automatic gain control function of the automatic gain controller is not activated. The mobile phone according to claim 14, wherein the first specific video format is one of a wmv format, an mp4 format, an avi format, a 3gp format, a 3g2 format, and an m4v format, and the first specific audio format. It is one of wav format, mp3 format and mid format. The mobile phone of claim 9, wherein the detecting and determining unit is configured to determine whether the current playing file is a first specific audio format to generate a first determination result; and the micro processing unit is The automatic gain control function of the automatic gain controller is activated when the first determination result indicates that the current playback file is the first specific audio format. The mobile phone according to claim 16 , wherein the detecting and determining unit is further configured to determine, according to the first determining result, that the current playing file is not the first specific audio format, determining whether the current playing file is a first specific video format to generate a second determination result; and the micro processing unit is further configured to activate the automatic gain controller when the second determination result indicates that the current playback file is the first specific video format The automatic gain control function; and when the second determination result indicates that the current play file is not the first specific video format, the automatic gain control function of the automatic gain controller is not activated. The mobile phone according to claim 17, wherein the first specific video format is one of a wmv format, an mp4 format, an avi format, a 3gp format, a 3g2 format, and an m4v format, and the first specific audio format. It is one of wav format, mp3 format and mid format.