KR100501273B1 - Method for improvement of image quality according to audio/video mode selecting of mobile phone - Google Patents

Abstract

The present invention provides a method of improving image quality according to voice / video mode selection of a mobile communication terminal that allows a user to widen the range of selection by adjusting the image quality according to the AMR bitrate selection during a video call of the mobile communication terminal. The purpose is.

To this end, the present invention provides a method of improving image quality according to a voice / video mode selection by a user of a mobile communication terminal. AMR bitrate is set and the number of bytes of the video data is adjusted according to the set AMR bitrate, and the adjusted audio data and the video data are transmitted to the receiving terminal of the other party. It provides a useful effect to select the best high-definition for the terminal user who needs to transmit the video signal.

Description

Method for improvement of image quality according to audio / video mode selecting of mobile phone}

The present invention relates to a method for improving image quality according to voice / video mode selection of a mobile communication terminal. More particularly, the present invention relates to a method of allowing a user to adjust the image quality according to the AMR bit rate selection during a video call. The present invention relates to a method for improving image quality according to a voice / video mode selection of a mobile communication terminal that allows a wider range.

Conventionally, image processing is possible by bypassing image data without going through an interworking function (IWF) in a wireless network section for image processing such as H.324, which is a kind of video terminal.

Hereinafter, the prior art will be described with reference to the accompanying drawings.

1 is a block diagram showing a conventional video call connection method.

First, the video terminals 10 and 20 for initiating video call setup initiate a call directly through a user interface inside the terminal and start a video call through a bypass video service option.

After the base station 30 recognizes the video call service option, the exchange station 40 uses the service option and the other party's telephone number to set up a video call through the base station where the other terminal is located.

Then, a traffic channel of the transmitting terminal 10 side is opened and a radio link protocol (RLP) is connected between the transmitting terminal 10 and the base station 30 (S1).

The data of the upper video application layer of the transmitting terminal 10 is transmitted to the base station 30.

The receiving terminal 20 confirms that it is a video call through a service option downloaded from the base station 30 and informs the user of the video call.

 The user answers after determining whether to receive a video call.

The receiving terminal 20 according to this service option drives the base station and the radio link protocol after opening the traffic channel (S2).

The base station 30 and the switching center 40 connect them, and as a result, the data between the terminals 10 and 20 is directly connected without passing through an IWF or a packet data service node (PDSN). do.

Therefore, the upper application layer between both terminals is connected to the bypass service option as described above to transmit video and audio to maintain a video call.

At this time, the receiving terminal 20 confirms that the video call through the service option down from the base station 30 and informs the user of the video call, the user determines whether to receive the video call and responds.

In the video call as described above, one bit rate (12.2 kbps) is fixedly used when an AMR (Adaptive Multi-Rate) voice codec is used.

Therefore, the video call quality is fixed and transmitted, and there is a problem in that a terminal user who needs to transmit a higher quality video signal than sound quality does not provide room for selecting high quality.

Accordingly, the present invention has been proposed to solve the above-mentioned problems. The mobile communication terminal allows the user to expand the range of selection by adjusting the image quality according to the AMR bitrate selection during the video call of the mobile communication terminal. The purpose of the present invention is to provide a method for improving image quality according to voice / video mode selection.

In order to achieve the above object, the present invention provides a method of improving image quality according to a voice / video mode selection by a user of a mobile communication terminal. Setting the corresponding AMR bitrate as a value of the rate, and adjusting the number of bytes of the image data according to the set AMR bitrate, and transmitting the adjusted audio data and the image data to the receiving terminal of the other party. .

The AMR bitrate is processed in the voice codec of the terminal, the AMR bitrate selectively uses any of four modes among the eight modes, and any of the four AMR bitrate modes is 5.15kbps, 7.40kbps, 10.2 kbps and 12.2 kbps.

The AMR bitrate is selected so that the terminal user presses a predetermined key button on the keypad and the side key of the user terminal, and the predetermined key button on the keypad and the side key of the user terminal corresponds to the AMR bit rate. Key buttons are assigned, and any of the four key buttons corresponding to the predetermined AMR bit rate is set to 6, 7, 8, and 9 key buttons.

When the number of bytes of video data is adjusted according to the set AMR bitrate, the encoded data is encoded according to the adjusted value, and the adjusted audio data and video data are muxed in International Standard H.223 and transmitted to the receiving terminal of the other party. In the receiving terminal, the received voice data and the image data are demuxed in the international standard H.223, and then the demuxed voice data and the image data in the receiving terminal are decoded and processed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a control block diagram of an image data input / output using an image mobile communication terminal to which the present invention is applied.

As shown in FIG. 2, the video codec 110 for processing the video signal 100 into a digital signal, the microphone 120 for inputting the audio signal, the speaker 130 for outputting the audio signal, and the voice. A voice codec 140 for converting a signal into a digital signal is provided, and a modem 150 for converting a digital signal converted from the video codec 110 and the voice codec 140 according to a communication mode, and the digital signal The wireless communication module 160 for transmitting to the other side, the memory 190 for storing the video signal and the audio signal input by the user, and the digital signal converted by the audio codec 140 and the video codec 110 It is configured to include a memory interface 180 to be delivered to the memory 190 to store.

In addition, the external system 210 outputs the video signal and the audio signal input by the terminal user to the other side, and the external system interface 220 provided to transmit the video signal and the audio signal input by the user to the external system 210. ), An input / output interface 220 for inputting / outputting the video signal 100 to the terminal, a liquid crystal display 230 of the terminal for outputting the video signal output from the input / output interface 220, and the image signal for transmitting. And a main control unit 170 for inputting a telephone number and selecting a communication mode, and a main control unit 170 for controlling the input and output of the video signal according to the communication mode input to the keypad 240. .

The overall control operation of the present invention is made by the main controller 170.

In the above configuration, the present invention is any of four AMR bitrates processed in the voice codec 140 (4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, 12.2 or more, and the unit is kbps). Branch modes (5.15, 7.40, 10.2, 12.2 kbps) can be selected by the terminal user to adjust the sound quality and the image quality of the voice data and the image data transmitted to the counterpart receiving terminal.

The four modes (5.15, 7.40, 10.2, 12.2kbps) is selected for convenience as an embodiment of the present invention, it can be changed to any combination of modes other than the above.

When the terminal user wants to convert the bitrate of 12.2kbps set as the default during a video call, any predetermined key button on the terminal keypad 240, for example, four keys according to four modes of 6, 7, 8, and 9 Use the button to change the bit rate.

In addition to the above, the bit rate is changed by using a side key button provided on the side of the terminal.

The four (6, 7, 8, 9) is also selected for convenience as an embodiment of the present invention, it is possible to change any number of key button combinations in addition to the key button.

When the sixth key button is pressed on the keypad 240 of the terminal, the AMR bit rate is set to 5.15 kbps among the four modes (5.15, 7.40, 10.2, 12.2 kbps).

At this time, the number of bytes occupied by the voice data of the voice codec 140 is set from 31 bytes to 14 bytes.

That is, since the terminal user selects 5.15 kbps while transmitting voice data at 31 bytes for 12.2 kbps, the 14 bytes used for 5.15 kbps are set.

Therefore, subtracting 14 bytes of 5.15kbps (31 bytes-14 bytes = 17 bytes) from 31 bytes of 12.2kbps set as the above defaults, 17 bytes are left, and this remaining 17 bytes of audio data is used for video data. Since it can be converted and processed by the image codec 110 and used for predetermined image data, the image quality transmitted to the counterpart receiving terminal can be improved accordingly.

In particular, when the user wants a high quality video call without any voice call, the AMR bit rate can be used as the bit rate for the video call, thereby further improving the best high quality video call.

As described above, when the seventh key button is pressed on the keypad 240 of the terminal, the AMR bit rate is set to 7.40 kbps among the four modes (5.15, 7.40, 10.2, 12.2 kbps).

At this time, the number of bytes occupied by the voice data of the voice codec 140 is set from 31 bytes to 19 bytes.

That is, since the terminal user selects 7.40 kbps while transmitting voice data at 31 bytes for 12.2 kbps, the 19 bytes used for 7.40 kbps are set.

Therefore, by subtracting 19 bytes of 7.40kbps (31 bytes-19 bytes = 12 bytes) from 31 bytes of 12.2kbps set as the above-mentioned (12 bytes-19 bytes = 12 bytes), 12 bytes remain, and the remaining 12 bytes of audio data are used for video data. Since it can be switched, the image quality transmitted to the other receiving terminal can be improved.

In addition, when the eight key buttons are pressed on the keypad 240 of the terminal, the AMR bit rate is set to 10.2 kbps among the four modes (5.15, 7.40, 10.2, 12.2 kbps).

At this time, the number of bytes occupied by the voice data of the voice codec 140 is set from 31 bytes to 26 bytes.

That is, since the terminal user selects 10.2 kbps while transmitting voice data at 31 bytes for 12.2 kbps, the 26 bytes used for 10.2 kbps are set.

Therefore, subtracting 26 bytes of 10.2kbps (31 bytes-26 bytes = 5 bytes) from 31 bytes of 12.2kbps set as the above defaults, 5 bytes are left, and this remaining 5 bytes of audio data is used for video data. Since it can be switched, the image quality transmitted to the other receiving terminal can be improved.

3 is a flowchart illustrating the overall operation flow of the image quality improving method according to the voice / video mode selection according to the embodiment of the present invention. When a terminal user starts a video call, first, an arbitrary key button is pressed on the keypad 240 of the terminal. AMR bit rate is selected (301).

The AMR bitrates are bitrates according to four modes (5.15, 7.40, 10.2, 12.2kbps) and correspond to four (6, 7, 8, 9) key buttons on the keypad 240 of the terminal, respectively. .

After selecting (301) the AMR bitrate, it is determined whether the selected bitrate is 5.15kbps (302), and if it is correct, the AMR bitrate is set to the selected value (305).

At this time, subtracting 14 bytes of 5.15kbps (31 bytes-14 bytes = 17 bytes) from 31 bytes of 12.2kbps set as the above defaults and converting the remaining 17 bytes of audio data for video data is used.

If it is determined that the selected bit rate is 5.15 kbps (302), if it is wrong, it is determined whether the selected bit rate is 7.40 kbps (303). If it is correct, the AMR bit rate is set to the selected value (305).

In this case, subtract 19 bytes of 7.40kbps (31 bytes-19 bytes = 12 bytes) from 31 bytes of 12.2 kbps set as the basic data, and convert the remaining 12 bytes of audio data for video data.

If it is determined that the selected bitrate is 7.40 kbps (303), and if it is wrong, it is determined whether the selected bitrate is 10.2 kbps (304), and if it is correct, the AMR bitrate is set to the selected value (305).

At this time, subtracting 26 bytes of 10.2kbps (31 bytes-26 bytes = 5 bytes) from 31 bytes of 12.2kbps set as the basic data, and converting the remaining 5 bytes of audio data for video data.

If it is determined that the selected bit rate is 10.2 kbps (304), the selected bit rate is the remaining 12.2 kbps, so the AMR bit rate is set to the selected value (305).

In this case, since 31 bytes of 12.2kbps set as the basic data are used as they are for audio data, there is no bit rate for extra video data.

In this way, the AMR bitrate is set to each selected value (305), and then the number of bytes of image data is adjusted (306) according to the corresponding selected AMR bitrate.

The number of bytes of the image data is adjusted 306 according to the corresponding selected AMR bit rate, and then the audio data and the image data encoded according to the adjusted number of bytes are transmitted to the receiving terminal 250 of the other party. 307) and the operation ends.

When transmitting to the receiving terminal of the other party (307), the voice data and video data of each data size is muxed in the international standard H.223 (muxing) and transmitted to the receiving terminal 250 of the other party, the receiving terminal of the other party 250 receives the demuxed signal from the international standard H.223 and decodes the audio data and the image data.

As described in detail above, the present invention allows the user to widen the selection by adjusting the height of the image quality according to the AMR bitrate selection during the video call of the mobile communication terminal, and transmit a higher quality video signal than the sound quality. It provides a useful effect for the terminal user in need to select the best high quality.

1 is a block diagram showing a conventional video call connection method.

Figure 2 is a control configuration for operating the video data input and output using the video mobile communication terminal to which the present invention is applied.

3 is a flowchart showing the overall operation of the image quality improving method according to the voice / video mode selection of an embodiment of the present invention.

Claims (10)

In the method of the user of the mobile terminal to improve the image quality according to the voice / video mode selection, Selecting one of a plurality of AMR bitrate modes in which the number of bytes of voice data is less than or equal to the recommended bitrate of the international standard during video calls of the user terminal to reduce the number of bytes of the voice data; Adjusting the number of bytes of the image data to be increased by the number of bytes of the audio data; And transmitting the adjusted voice data and video data to a receiving terminal of the other party. delete The method according to claim 1, The plurality of AMR bitrates are of the four modes of 5.15kbps, 7.40kbps, 10.2kbps and 12.2kbps among 8 modes, and the image quality improvement method according to the voice / video mode selection of the mobile communication terminal. delete The method according to claim 1, And the user selects the AMR bit rate by pressing a predetermined key button on a keypad or side key of the terminal. The method according to claim 5, And a key button corresponding to each of the plurality of AMR bitrates to a keypad or a side key of the terminal. The method according to claim 1, The image quality improvement method according to the voice / video mode selection of the mobile terminal for encoding the adjusted image data to match the adjusted value. The method according to claim 1, The image quality improvement method according to the voice / video mode selection of the mobile communication terminal, characterized in that the muxing the adjusted audio data and video data to the international standard H.223 to be transmitted to the receiving terminal of the other party. The method according to claim 8, The receiving terminal of the other party is to improve the image quality according to the voice / video mode selection of the mobile communication terminal, characterized in that for demuxing the audio data and video data received from the user terminal to the international standard H.223. The method according to claim 9, The image quality improvement method according to the voice / video mode selection of the mobile communication terminal to decode and process the demuxed audio data and video data.