KR100706890B1 - Mobile communication terminal having multimedia function, and method for recording and playing - Google Patents

Abstract

In a mobile communication terminal having an external (native number) external camera and external sound input units, an m (natural number) external display unit, and an external sound output unit, an image captured by the external camera is input and recorded from the external sound input unit. An input port for receiving the received sound; An output port for outputting an image to be displayed on the external display unit and outputting a sound to be output from the external sound output unit; A memory configured to store an image and sound input through the input port; And process the image and sound received through the input port, synchronize and record the image and sound, and store the image and sound in the memory, and store the image and sound recorded through the output port or the image and sound stored in the memory. The present invention relates to a mobile communication terminal including a digital signal processing unit for reproducing. By having a digital signal processing unit that processes both video and audio related tasks, the load on the CPU can be minimized, and the number and cost of components in the hardware configuration of the mobile communication terminal are handled by the digital signal processing unit. Has the effect of reducing

Mobile Terminals, Digital Signal Processors, Multimedia, Recording, Playback

Description

Mobile communication terminal having multimedia function, and method for recording and playing

1 to 2 is a schematic structural diagram of a mobile communication terminal capable of shooting a video according to the prior art.

3 is a view showing a schematic structure of a mobile communication terminal having a digital signal processing unit according to an embodiment of the present invention.

4 is a block diagram illustrating a schematic structure of a digital signal processor 310 according to an exemplary embodiment of the present invention.

5 is a flowchart of a recording method in a mobile communication terminal 300 including a digital signal processor 310 according to an exemplary embodiment of the present invention.

6 is a flowchart of a reproduction method in a mobile communication terminal 300 including a digital signal processor 310 according to an exemplary embodiment of the present invention.

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

300: mobile communication terminal

310: digital signal processing unit 320: control unit

330-1, 330-2: built-in camera 340-1, 340-2: built-in display

350: key input unit 360: memory

370: sound input unit 380: sound output unit

450: input port 460: output port

335-1, 335-2,... , 335-n: external camera

345-1, 345-2,... , 345-m: external display

The present invention relates to a portable terminal, and more particularly, to a portable terminal equipped with a plurality of cameras and a display unit device.

The portable terminal refers to an electronic device that is formed in a small size to facilitate a function of a game, mobile communication, and the like, so that the user can easily carry it. Portable terminals include mobile communication terminals, personal digital assistants (PDAs), and portable multimedia terminals (PMPs).

Among them, the mobile communication terminal is essentially a device implemented so that a mobile user can make a phone call with a remote receiver. However, due to the development of science and technology, recent mobile communication terminals have additional functions such as a camera function and a multimedia playback function in addition to the essential functions such as a phone call function, a short message transmission and reception function, and an address book management function.

1 to 2 is a schematic structural diagram of a mobile communication terminal capable of shooting a video according to the prior art.

Referring to FIG. 1, the mobile communication terminal 100 includes a control unit 110, an audio codec 120, cameras 130-1 and 130-2 (hereinafter referred to as 130), and display units 140-1 and 140-2; 140), a key input unit 150, a memory 160, a sound input unit 170, and a sound output unit 180. An essential high frequency processor, an antenna, a power supply, and the like for communication, which are essential functions of a phone call function and a short message transmission and reception function, may be further included.

The controller 110 controls the overall operation of the mobile communication terminal 100. The controller 110 may include a central processing unit (CPU) or a micro-controller.

The audio codec 120 performs and processes an operation related to an acoustic signal. A / D conversion of the sound signal input through the sound input unit 170 may be reprocessed by a predetermined method, or digital / analog conversion may be performed by reprocessing a signal transmitted from a remote receiver. / A conversion) and outputs to the outside through the sound output unit 180. In addition, the audio codec 120 is in charge of processing a sound signal for playing a music file such as mp3 or a video such as avi or mpeg due to the recent addition of a multimedia playback function.

The camera 130 captures an external image, and the display unit 140 displays an operation state of the mobile communication terminal 100 and an external image captured by the camera 130. The camera 130 may shoot an external image as a still image or continuously shoot as a video.

The key input unit 150 generates key data for performing various function setting, dialing, etc. of the mobile communication terminal 100 and transmits the generated key data to the controller 110.

The memory 160 stores an operation program, various data, and the like of the mobile communication terminal 100. An external image of the camera 130 processed through the controller 110 and an audio signal processed by the audio codec 120 may be stored.

The sound input unit 170 receives a sound signal from the outside of the mobile communication terminal 100. The sound input unit 170 may be a microphone.

The sound output unit 180 outputs the sound signal transmitted through the audio codec 120 to the outside. The sound output unit 180 may be a speaker.

The controller 110 performs the camera 130, the display 140, and the audio codec 120 to perform camera functions, multimedia functions, etc. in addition to functions such as phone calls and short message transmission and reception, which are essential functions of the mobile communication terminal 100. You have to control all of your lights. As a result, the controller 110 is easily subjected to excessive load, and the number of cameras 130 and the display unit 140 may be mounted to smoothly perform the function of the controller 110.

Referring to FIG. 2, as the multimedia function is emphasized in the mobile communication terminal 100, a digital signal processor 200 may be further included to perform the multimedia function.

The digital signal processor (DSP) 200 is connected to the camera 130 and the display unit 140 among the components of the mobile communication terminal 100 illustrated in FIG. 1. The external image photographed by the camera 130 is processed, and the external image is displayed through the display unit 140.

Although the image processing function is performed through the digital signal processing unit 200, in the case of still video recording, the digital signal processing unit 200 and the audio codec 120 are processed by the controller 110 to synchronize the image and the audio. There was a difficulty in bringing video and audio to match real-time sync. As a result, the control unit 110 allocates resources to perform multimedia functions in addition to the essential functions such as communication, and there is still a problem in that a load is applied. In addition, there are limitations on the number of controllable cameras and displays due to constraints such as the size and internal structure of the mobile communication terminal 100.

Accordingly, an object of the present invention for solving the above problems is to provide a mobile communication terminal having a digital signal processing unit that can be equipped with a plurality of cameras and displays.

Another object of the present invention is to provide a mobile communication terminal having a digital signal processing unit capable of processing all of shooting, playback, sync of image and sound, and the like with respect to still images and moving images.

Another object of the present invention is to provide a mobile communication terminal having a digital signal processing unit for processing both video and audio related tasks so as to minimize the load on the control unit (CPU).

It is still another object of the present invention to provide a mobile communication terminal capable of reducing the number and cost of components in hardware configuration of a mobile communication terminal by performing the function of an audio codec in a digital signal processing unit.

Other objects of the present invention will be readily understood through the following description.

In order to achieve the above object, according to an aspect of the present invention, in the mobile communication terminal connected to the n (natural number) external camera and the external sound input unit, m (natural number) external display unit and the external sound output unit, the external An input port configured to receive an image captured by a camera and to receive a recorded sound from the external sound input unit; An output port for outputting an image to be displayed on the external display unit and outputting a sound to be output from the external sound output unit; A memory configured to store an image and sound input through the input port; And process the image and sound received through the input port, synchronize and record the image and sound, and store the image and sound in the memory, and store the image and sound recorded through the output port or the image and sound stored in the memory. There may be provided a mobile communication terminal including a digital signal processing unit for outputting reproducibly.

Preferably, the apparatus may further include a key input unit connected to the digital signal processing unit to receive key data, wherein the key data may perform a recording or reproducing function in the digital signal processing unit.

The apparatus may further include a controller configured to control the digital signal processor to perform a recording or reproducing function.

In addition, a built-in camera built in the mobile communication terminal for taking an external image; And a built-in sound input unit embedded in the mobile communication terminal and recording external sound.

In addition, a built-in display unit embedded in the mobile communication terminal for displaying the image; And a built-in sound output unit embedded in the mobile communication terminal and outputting the sound. The image may be a still image or a moving image.

Also preferably, the digital signal processor may include an image processor configured to process an input image; A sound processor configured to process the input sound by analog / digital conversion; An image and sound synthesizer configured to generate a synthesized signal by synchronizing the image processed by the image processor and the sound processed by the sound processor; A storage unit to store the synthesized signal in the memory; A reproducing unit reproducing the synthesized signal stored in the memory; An input / output interface that receives the image and transmits the image to the image processor, receives the sound, transmits the synthesized signal to the memory, and receives the synthesized signal from the memory; A first digital signal that selects one or more of the n external cameras and an external sound input unit to receive the image and sound, and selects one or more of the m external display units and an external sound output unit to output the synthesized signal It may include a digital signal controller for generating a second digital signal.

In order to achieve the above objects, according to another aspect of the present invention, n (natural number) external camera and external sound input unit, m (natural number) external display unit and external sound output unit are connected to the outside, and the digital signal processing unit and memory A recording method in a mobile communication terminal, comprising: receiving a recording request from the digital signal processor; Selecting at least one of the n external cameras and an external sound input unit; Receiving an image and a sound from the selected external camera and an external sound input unit; Selecting at least one of the m external display units and an external sound output unit; Previewing the received image and sound through the selected external display unit and external sound output unit and checking whether the output is normal; Generating a synthesized signal by synchronizing the received image and sound when the check result is normal; And storing the synthesized signal in the memory.

In order to achieve the above objects, according to another aspect of the present invention, in the reproducing method in a mobile communication terminal having m (natural number) external display unit and external sound output unit connected to the outside, and having a digital signal processing unit and a memory, (a) receiving a request to play the digital signal processor; (b) selecting at least one of the m external display units and an external sound output unit; (c) receiving composite data from the memory, wherein the memory stores composite data of pre-recorded video and sound; (d) confirming an abnormality of the synthetic data; (e) reproducing the synthesized data when there is no abnormality in the confirmation result; And (f) displaying and outputting the synthesized data to be reproduced through the external display unit and the external sound output unit selected in the step (b).

Preferably, the method further comprises (g) checking whether there is other synthetic data to be reproduced after the reproduction of the synthesized data is completed. g) step may be repeated.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art, although not explicitly described or shown herein, can embody the principles of the present invention and invent various methods and apparatus using the same that are included in the concept and scope of the present invention. In addition, it is to be understood that all detailed descriptions, including the principles, aspects, and embodiments of the present invention, as well as listing specific embodiments, are intended to include structural and functional equivalents.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Numbers (eg, first, second, etc.) used in the description of the present specification are merely identification symbols for sequentially distinguishing identical or similar entities.

In the present invention, the multimedia function means that an external still image can be captured, a video can be captured, a sound signal can be recorded, a still image or a video reproduced, and a recorded sound signal can be reproduced.

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

3 is a view showing a schematic structure of a mobile communication terminal having a digital signal processing unit according to an embodiment of the present invention.

Referring to FIG. 3, the mobile communication terminal 300 includes a digital signal processor 310, a controller 320, a memory 360, an input port 450, and an output port 460. The mobile communication terminal 300 includes a built-in camera 330-1 and 330-2 (hereinafter referred to as 330), a built-in display unit 340-1 and 340-2 (hereinafter referred to as 340), a key input unit 350, and a built-in sound input unit. 370 and a built-in sound output unit 380 may be further included. The n (natural number) external cameras 335-1, 335-2, ..., 335-n (hereinafter referred to as 335) and the n external sound input units 375-1, 375-2, through the input port 450 375-n (hereinafter referred to as 375), and m (natural numbers) external display units 345-1, 345-2, ..., 345-m (hereinafter referred to as 345) through the output port 460. And m external sound outputs 385-1, 385-2, ..., 385-m (hereinafter referred to as 385). Where n or m is any natural number.

An essential function of the mobile communication terminal is a high frequency processor, an antenna, a power supply, and the like for communication such as a telephone call, a short message transmission and the like, which are obvious to those skilled in the art and a detailed description thereof will be omitted.

The key input unit 350 generates key data for performing various function setting, dialing, etc. of the mobile communication terminal, and transmits the generated key data to the controller 310 and / or the digital signal processor 310. In addition, the key input unit 350 selects and utilizes various functions of the digital signal processor 310 to be described later through the key data. That is, a predetermined button or key is designated in advance in the key input unit 350, and when the button or key is input, the function of the digital signal processing unit 310 is selected to select a play function, a recording function, a recording function, or the like, so that the corresponding function is exerted. Can be.

The memory 360 stores an operation program, various data, and the like of the mobile communication terminal 300. The memory 360 may be a flash memory embedded in the mobile communication terminal 300 or an external memory. The memory 360 stores image and sound data processed by the digital signal processor 310 or stores image and sound data to be processed.

The sound input unit includes a built-in sound input unit 370 or an external sound input unit 375. The sound input unit receives a sound signal from the outside of the mobile communication terminal 300. The sound input unit may include an analog / digital converter (A / D converter) for converting an external analog sound signal to digital.

The built-in sound input unit 370 may be a microphone built basically for a phone call in the mobile communication terminal 300. Alternatively, the plurality of external sound input units 375 may be microphones installed together in an external form corresponding to the positions of the plurality of external cameras 335 installed outside. The external sound input unit 375 inputs a sound signal to the digital signal processor 320 through an input port 450 which will be described later.

The sound output unit includes a built-in sound output unit 380 or an external sound output unit 385. The sound output unit outputs a sound signal to the outside. The sound output unit may be a speaker. The sound output unit may include a digital to analog converter (D / A converter) for converting a digital sound signal into an analog.

The built-in sound output unit 380 may be a speaker basically built in for communication in the mobile communication terminal 300. Alternatively, the plurality of external sound input units 385 may be speakers installed together in an external form corresponding to the positions of the plurality of external display units 345 installed outside. The external sound output unit 385 receives the sound signal output from the digital signal processor 320 through the output port 460 which will be described later.

The built-in camera 330 captures an external still image or video. The built-in camera 330 is limited to three or more embedded by the module size and function of the mobile communication terminal 300.

Thus, the mobile communication terminal 300 has an input port 450 to overcome the limitation. An external still image or a video captured by the plurality of external cameras 335 is received through the input port 450. An external camera that captures a still image or a moving image to be input through the input port 450 is selected, and receives a still image or a moving image captured therefrom. At this time, it is possible to simultaneously receive a sound signal recorded from the external sound input unit 370 installed corresponding to the position of the external camera.

The built-in display unit 340 displays an operation state of the mobile communication terminal 300 and an external still image or a video captured by the camera 330. The built-in display unit 340 is limited to three or more embedded by the module size and function of the mobile communication terminal 300. The built-in display unit 340 may be configured of an LCD, an OLED, or the like.

Thus, the mobile communication terminal 300 has an output port 460 to overcome the limitation. An external still image or video to be displayed on the plurality of external display units 345 is transmitted through the output port 460. An external display unit is selected through the output port 460 and a still image or a video to be output is transmitted. In this case, a sound signal recorded in correspondence with a still image or a moving image may be transmitted to the external sound output unit 380 installed corresponding to the position of the external display unit. The external display unit may be an image output device capable of outputting an image signal, that is, various devices such as a TV, a projector, and a computer.

The controller 320 controls the overall operation of the mobile communication terminal 300. The controller 320 may include a central processing unit (CPU) or a micro-controller.

The controller 320 performs an essential function of the mobile communication terminal 300. The essential function of the mobile communication terminal 300 means a function for communication, that is, a function such as a telephone call, a short message transmission and the like. In the present invention, the control unit 320 may control the digital signal processor 310 to perform a multimedia function. The input of the key or button input through the key input unit 350 may operate the digital signal processor 310 immediately according to the setting, or the control unit 320 may detect and determine the input of the key or button to determine the digital signal. The processor 310 may also perform a multimedia function.

The digital signal processor (DSP) 310 performs a multimedia function under the control of the controller 320 or a key or button input directly from the key input unit 350. The digital signal processor 310 may directly reduce the load of the controller 320 by using the built-in camera 330, the external camera 335, the built-in display unit 340, the external display unit 345, the key input unit 350, and the memory 360. ), A built-in sound input unit 370, an external sound input unit 375, a built-in sound output unit 380, and an external sound output unit 385. The external camera 335 and the external sound input unit 375 are connected through an input port 450, and the external display unit 345 and the external sound output unit 385 are connected through an output port 460.

The digital signal processor 310 includes a conventional audio codec to process a sound signal in order to synchronize the captured image and sound, that is, to sync, when the video is captured.

Hereinafter, the digital signal processor 310 will be described in detail with reference to FIG. 4.

4 is a block diagram illustrating a schematic structure of a digital signal processor 310 according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the digital signal processor 310 includes an image processor 311, a sound processor 312, an image and sound synthesizer 313, a storage 314, a playback unit 315, and an input / output interface 316. ) And a digital signal controller 317.

The image processor 311 processes a still image or a video input through the input / output interface 316. Image processing is an essential function of the digital signal processor 310 and processes the input image.

The sound processor 312 is in charge of the functions of the existing audio codec. The sound processor 312 performs and processes an operation related to a sound signal. A / D conversion of the sound signal input through the sound input unit 370 may be reprocessed by a predetermined method, or digital / analog conversion may be performed by reprocessing a signal transmitted from a remote receiver. / A conversion) and outputs to the outside through the sound output unit 380. In addition, the sound processor 312 is responsible for the processing of sound signals for playing music files such as mp3 or avi, mpeg, etc., due to the recent addition of multimedia playback functions.

The image and sound synthesizer 313 synchronizes and synthesizes the image signal processed by the image processor 311 and the sound signal processed by the sound processor 312. The video signal input from the external camera and the sound signal input from an external sound input unit 370 installed at the same or corresponding position as that of the external camera are synchronized. Synchronization, or sync, is an important part of capturing and reproducing a video. In the past, the controller 320 was heavily loaded by the controller 320. In the present invention, the image and sound synthesizer 313 of the digital signal processor 310 may be processed to minimize the load of the controller 320.

The video and sound synthesizer 313 synthesizes the video and audio signals and processes the video and sound signals to have a format such as MPEG4, MP4, JPEG, AVI, or the like.

The storage unit 314 stores the synthesized signal synthesized by the image and sound synthesizer 313 in the memory 360. The storage unit 314 of the digital signal processor 310 directly accesses and stores the memory by receiving a predetermined storage key input from the key input unit 350 without passing through the control unit 320. As a result, the load on the controller 320 can be reduced.

The playback unit 315 loads the synthesized signal stored in the memory 360 or directly reproduces the synthesized signal synthesized by the video and sound synthesizer 313. The playback is possible by directly receiving a predetermined playback key from the key input unit 350 without being controlled by the controller 320. As a result, the load on the controller 320 can be reduced.

The input / output interface 316 is in charge of input / output of a signal input to the digital signal processor 310 and a signal output from the digital signal processor 310. The following signals are input and output through the input / output interface 316.

The key data input from the key input unit 350 is received. The key data includes data of various keys such as a storage key, a recording key, a recording key, a playback key, and the like to directly perform a multimedia function in the digital signal processing unit 310 without passing through the control unit 320. This is set in advance in the mobile communication terminal 300.

Video signals and / or sound signals are received from the plurality of external cameras 335 and / or the plurality of external sound input units 375 through the input port 450. Alternatively, the video signal and / or audio signal may be directly received from the built-in camera 330 and / or the built-in sound input unit 370.

The output port 460 outputs an image signal and / or an audio signal to the plurality of external display units 345 and / or the plurality of external sound output units 385. Alternatively, the video signal and / or audio signal may be directly output from the built-in display unit 340 and / or the built-in sound output unit 380.

It is connected to the memory 360 and outputs a synthesized signal obtained by combining an image signal and an audio signal to be stored in the memory 360 or receives a synthesized signal stored in the memory 360 for reproduction.

The digital signal controller 317 generates a digital signal and selects any one of the plurality of external cameras 335 and / or the plurality of external sound input units 375 to receive an image signal and / or an audio signal. One of the display unit 345 and / or the plurality of external sound output units 385 is selected to control whether to output an image signal and / or an audio signal.

The plurality of external cameras 335 and / or the plurality of external sound input units 375 are connected to the digital signal processor 310 through the input port 450. The digital signal controller 317 of the digital signal processor 310 selects one external camera and / or an external sound input unit to selectively receive an image signal and / or an audio signal through the input port 450.

The plurality of external display units 345 and / or the plurality of external sound output units 385 are connected to the digital signal processor 310 through an output port 460. The digital signal controller 317 of the digital signal processor 310 selects any one of the external display unit and / or the external audio output unit to selectively output an image signal and / or an audio signal through the output port 460.

5 is a flowchart illustrating a recording method in the mobile communication terminal 300 including the digital signal processor 310 according to an exemplary embodiment of the present invention. In the present invention, recording refers to two processes of capturing an image and recording sound, and means recording and recording of an image.

Referring to FIG. 5, in step S510, the digital signal processor 310 is set to have a basic function as a default.

In operation S520, the digital signal processor 310 is commanded to perform a recording function through the key input unit 350. The command may control the digital signal processor 310 to be controlled by the controller 320 via the controller 320. In order to reduce the load of the controller 320, the digital signal processor 310 may be directly processed without passing through the controller 320. By the command, a corresponding component of the digital signal processor 310 for image and sound recording is activated in the digital signal processor 310.

In operation S530, the digital signal processor 310 selects one or more external cameras or built-in cameras 330 installed at positions where recording of video and audio signals is to be performed. Since there is only one input port 450 and one image signal line that can be input from an external camera through the input port 450, when two or more external cameras are selected, each of the input ports is sequentially received. In addition, since there is also one sound signal line that can be input from the external sound input unit, when two or more external sound input units are selected, the respective inputs are sequentially received. In this case, it is preferable that the external camera and the external sound input unit respectively accept inputs corresponding to each other.

In operation S540, the digital signal processor 310 selects a display unit and / or an audio output unit to output a synthesized signal obtained by combining the input image signal and the audio signal. The display unit may be one or more external display units or built-in display unit 340. The sound output unit may be one or more external sound output units (not shown) or the built-in output unit 380. Since there is only one output port 460 and one video signal line through which the video signal is output and one audio signal line through which the audio signal is output, the output port 460 is sequentially output when two or more display units are selected. do. Preferably, the external display unit is provided with a corresponding external sound output unit. Accordingly, the external display unit outputs an image signal, and the external sound output unit outputs an audio signal.

In operation S550, the display unit selected in operation S540 determines whether an image captured by the camera is previewed and whether the output of the display unit is normal.

If the check result is not normal, the process proceeds to step S590 where it is input whether to continue shooting.

If the result of the check is normal, the process proceeds to step S560 to store the image signal captured by the camera and the sound signal input through the sound input unit in the storage unit 314.

In operation S570, the synthesized video and audio signals are synthesized by the video and audio signal synthesizer 313 to generate a synthesized signal and stored in the memory 360. Alternatively, the control unit 320 separately transmits the control to the control unit 320.

In step S580, when the synthesis and storage of the image signal photographed by the camera and the sound signal input through the sound input unit are completed, the digital signal processor 310 temporarily waits in the stopped state.

In step S590, when the key input by the key input to continue shooting from the key input unit 350 or receives a control signal to continue shooting from the control unit 320, the process returns to step S510 and repeats the steps S510 to S590. . If there is no key input to continue shooting, recording ends.

6 is a flowchart of a reproducing method of the mobile communication terminal 300 including the digital signal processor 310 according to an exemplary embodiment of the present invention. In the present invention, the term "play" includes two processes of displaying a photographed image and outputting a recorded sound.

Referring to FIG. 6, in step S610, the digital signal processor 310 is set to have a basic function as a default.

In operation S620, the digital signal processing unit 310 is commanded to perform a reproduction function through the key input unit 350. The command may cause the control unit 320 to control the digital signal processor 310 via the control unit 320, but to reduce the load of the control unit 320, the digital signal processor 310 may not directly go through the control unit 320. It is preferred to be treated at. By the command, a corresponding component of the digital signal processor 310 for reproducing the image and audio signals is activated in the digital signal processor 310.

In operation S630, the digital signal processor 310 sets an output volume when the sound signal is output. The setting may be directly input through the key input unit 350 or controlled by the controller 320 as in step S620. Step S630 may be omitted.

In operation S640, the digital signal processing unit 310 selects one or more external display units or built-in display units 340 installed at positions where video and audio signals are to be reproduced. Since there is only one output port 460 and one image signal line that can be output to the external display unit through the output port 460, when two or more external display units are selected, the image signals are sequentially output. In addition, since there is also one sound signal line that can be output to the external sound output unit, when two or more external sound output units are selected, the respective sound signals are sequentially output. In this case, the external display unit and the external sound output unit are preferably output corresponding to each other.

In step S650, data previously recorded and stored in the memory 360 is received. In this case, although the data stored in the memory 360 may be received through the controller 320, this increases the load on the controller 320, so that the digital signal processor 310 directly stores the memory 360 without passing through the controller 320. Is preferably connected to receive data.

In step S660, it is checked whether or not the data received from the memory 360 is intact.

If there is a problem as a result of the above confirmation, the flow advances to step S690 to examine whether or not to reproduce the next data.

If there is no abnormality as a result of the confirmation, the flow advances to step S670 to reproduce the received data.

In step S680, the display unit and sound output unit selected in step S640 by the reproduction display and output an image signal and an audio signal as data is reproduced.

In step S690, after the reproduction of the data is completed, whether there is further reproduction of the next data is examined. If there is more data to be reproduced, the flow advances to step S610 to repeat steps S610 to S690. If there is no more data to be played back, playback ends.

As described above, the mobile communication terminal having the digital signal processing unit according to the present invention may be equipped with a plurality of cameras, display units, and the like.

In addition, a digital signal processing unit capable of all processing such as photographing, reproducing, synchronizing image and sound with respect to a still image and a moving image may be provided.

In addition, it may have a digital signal processing unit for processing both video and audio related tasks to minimize the load on the control unit (CPU).

In addition, the function of the audio codec is in charge of the digital signal processor to reduce the number and cost of components in the hardware configuration of the mobile communication terminal.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (10)

A mobile communication terminal in which n (natural numbers) external cameras and external sound input units, m (natural numbers) external display units, and external sound output units are connected to an external device, An input port configured to receive an image captured by the external camera and to receive a recorded sound from the external sound input unit; An output port for outputting an image to be displayed on the external display unit and outputting a sound to be output from the external sound output unit; A memory configured to store an image and sound input through the input port; And Process the image and sound input through the input port, synchronize and record the image and sound, and store in the memory, and play the image and sound recorded through the output port or the image and sound stored in the memory Including a digital signal processing unit for outputting The digital signal processing unit, An image processor which processes the input image; A sound processing unit for converting the input sound into analog / digital processing; An image and sound synthesizer configured to generate a synthesized signal by synchronizing the image processed by the image processor and the sound processed by the sound processor; A storage unit for storing the synthesized signal in the memory; A reproduction unit for reproducing the synthesized signal stored in the memory; An input / output interface that receives the image and transmits the image to the image processor, receives the sound, transmits the synthesized signal to the memory, receives the synthesized signal from the memory, and A first digital signal that selects one or more of the n external cameras and an external sound input unit to receive the image and sound, and selects one or more of the m external display units and an external sound output unit to output the synthesized signal And a digital signal controller for generating a second digital signal. The method of claim 1, Further comprising a key input unit connected to the digital signal processing unit for receiving key data, And the key data is performed by the digital signal processor to perform a recording or reproducing function. The method of claim 1, And a controller configured to control the digital signal processor to perform a recording or playback function. The method of claim 1, A built-in camera embedded in the mobile communication terminal and configured to capture an external image; And Built-in sound input unit embedded in the mobile communication terminal for recording the external sound A mobile communication terminal further comprising. The method of claim 1, A built-in display unit embedded in the mobile communication terminal to display the image; And A built-in sound output unit embedded in the mobile communication terminal and outputting the sound; A mobile communication terminal further comprising. Claim 6 was abandoned when the registration fee was paid. The method of claim 1, And the image is a still image or a moving image. delete In a recording method in a mobile communication terminal having n (natural numbers) external cameras and external sound input units, m (natural numbers) external display units and external sound output units connected to the outside, and having a digital signal processing unit and a memory, Receiving a request for recording by the digital signal processor; Selecting at least one of the n external cameras and an external sound input unit; Receiving an image and a sound from the selected external camera and an external sound input unit; Selecting at least one of the m external display units and an external sound output unit; Previewing the received image and sound through the selected external display unit and external sound output unit and checking whether the output is normal; Generating a synthesized signal by synchronizing the received image and sound when the check result is normal; And Storing the synthesized signal in the memory Recording method in a mobile communication terminal comprising a. A reproduction method in a mobile communication terminal having m (natural numbers) external display units and external sound output units connected to the outside, and having a digital signal processing unit and a memory, (a) receiving a request to play the digital signal processor; (b) selecting at least one of the m external display units and an external sound output unit; (c) receiving composite data from the memory, wherein the memory stores composite data of pre-recorded video and sound; (d) confirming an abnormality of the synthetic data; (e) reproducing the synthesized data when there is no abnormality in the confirmation result; And (f) displaying and outputting the reproduced composite data through the external display unit and the external sound output unit selected in step (b). Playback method in a mobile communication terminal comprising a. The method of claim 9, (g) after the reproduction of the synthesized data is completed, checking whether there is other synthetic data to be reproduced, And repeating steps (a) to (g) when there is other synthetic data to be reproduced as a result of the checking.

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