KR20150115037A - The equipments and analysis method of checking editorial for the video data taken by a mobile camera - Google Patents

Abstract

Provided is a method for accurately decoding whether a start and an end of a video filmed by a mobile phone are edited or not. The method comprises the following steps: delivering a signal between a storage device of a mobile phone camera module and a central processing unit (CPU); delivering a signal between the CPU and a direct memory access (DMA) controller; delivering data reading between the DMA controller and the storage device of the camera module; delivering data reading/writing between the DMA controller and internal/external storage devices; and delivering data writing between the DMA controller and a display device.

Description

Technical Field [0001] The present invention relates to a method and an apparatus for analyzing video data captured by a mobile phone camera,

[0001] The present invention relates to the presence or absence of video editing captured by a mobile phone camera, and more particularly, to a video editing method capable of editing information relating to video editing, including a central processing unit of a mobile phone and a direct memory access controller : A process of reading / writing data), and reading out whether or not the edited video starts and ends.

In general, a popular mobile phone camera has a function to shoot moving images and still images. Currently, digital camcorders are used for video recording, but they are only used in special places due to their weight and weight. Video camera function of mobile camera which is an alternative mechanism of digital camcorder has an advantage that it can be used easily anywhere. In particular, cell phone cameras are used in many cases at present when there are social incidents. Social crime cases, when used for crime, are often used as critical information to establish an alibi by editing crime time if they have knowledge of video editing. In the case of a moving image photographed by a mobile phone camera, basic information of the shooting time and the ending time is recorded when the metadata is observed. Since the user can edit the beginning and ending time of the photographed video about the start time and the end time of the mobile phone camera, there is a great possibility of a problem in a major incident. At present, there is no analysis of the editing of the start and end times of the video taken for the mobile camera. Therefore, it is a reality that can not be solved when the general people edit the start and end time of the photographed video about the mobile phone camera.

The general public can know the basic information of the photographed moving picture of the mobile phone camera from the metadata, and when the editing is operated by exploiting the basic information, it is urgently required to read whether or not the editing of the start and end times of the photographed moving picture is performed. Photographed on a mobile phone camera It is easy to edit the start and end times of a video, and if it is abused by a crime, there can be a serious social problem that can cause social confusion.

In the case of a video taken by a mobile phone camera, which is a social problem, it is necessary to analyze whether or not the video is edited when the start and end times of the video are arbitrarily edited. Therefore, this problem must be solved because it provides an important clue to judge whether or not the event is manipulated according to whether or not the start and end time of the photographed moving picture is edited.

The present invention provides a technique for correctly reading whether or not editing is performed on start and end times of a moving picture photographed by a mobile phone camera. In addition, the present invention accurately measures whether the start time and the end time are edited by measuring the time of storage from the mobile phone camera to the storage device.

According to the present invention, the access time of a storage device is measured by a central processing unit (CPU) and a DMA controller of a mobile phone, and it is possible to accurately read whether the start time and the end time of the photographed moving picture are edited by comparing the correct access time and the edited time.

Transmitting signals between a storage device of a mobile phone camera module and a central processing unit (CPU) according to an embodiment of the present invention; Passing signals between the central processing unit and a direct memory access (DMA) controller; Reading and delivering data between the DMA controller and a storage device of the camera module; A data read / write transfer step between the DMA controller and the internal / external storage device, and a data write / transfer step between the DMA controller and the display device.

At this time, when the cellular phone CPU receives a signal of photographing start from the cellular phone camera module, the CPU prepares to read data of the storage device of the camera module.

At this time, the mobile phone CPU and the DMA controller read the video data of the camera module by letting the CPU completely read the video data to the DMA controller. In order to do this, it includes a step of requesting and accepting the use of the data using the data and the use of the address and control buses with the DMA controller.

At this time, the mobile phone DMA controller includes a step of reading data of a storage device in a mobile phone camera module and writing the data to an internal / external storage device.

At this time, the mobile phone DMA controller includes reading data from the internal / external storage device and writing the video data to the display device.

The mobile phone display device includes reading the image data from the storage device of the mobile phone camera module through the DMA controller and displaying the image data on the screen.

The present invention provides a technique for correctly reading whether or not editing is performed on start and end times of a moving picture photographed by a mobile phone camera. The present invention accurately measures whether the start time and the end time are edited by measuring the time of storage from the mobile phone camera to the storage device.

According to the present invention, the access time of a storage device is measured by a central processing unit (CPU) and a DMA controller of a mobile phone, and it is possible to accurately read whether the start time and the end time of the photographed moving picture are edited by comparing the correct access time and the edited time.

1 is a diagram showing a data access processing system from a mobile phone camera to a display device according to an embodiment of the present invention.
2 is an operational flowchart showing a method of accessing photographed data from a cellular phone camera.

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

1 is a diagram showing a data access processing system from a mobile phone camera to a display device according to an embodiment of the present invention.

Referring to FIG. 1, in the data access processing system from the mobile phone camera to the display device of the present invention, the central processing unit 110 in the mobile phone first receives a signal of starting shooting from the mobile phone camera. At this time, the central processing unit must access the storage device 120 data of the camera module. In order to access most of the bulk data, the DMA controller 130 performs its role. The DMA controller receives an instruction from the CPU to access the storage device 120 data of the camera module. At this time, the DMA controller starts accessing the data of the storage device 120 of the camera module and stores the data in the internal / external storage device 140. In addition, the display device 150 displays a memory after accessing the memory for the captured image of the mobile phone.

2 is an operational flowchart showing a method of accessing photographed data from a cellular phone camera.

Referring to FIG. 2, when a central processing unit of the mobile phone detects whether a mobile phone camera is being photographed, photographing is started (210). At this time, the mobile phone CPU receives the image acquisition signal from the mobile phone camera and prepares the image to be read from the temporary storage device of the camera to the internal storage device or the external storage device of the mobile phone (220). The CPU delegates the whole volume through direct memory access because the CPU takes a lot of load when reading / writing a large amount of memory directly. Therefore, the mobile phone's CPU sends a read command to the direct memory access (DMA) controller (230). In most cases, the amount of stored memory is directly read / written by the DMA controller. At this time, the mobile phone DMA controller sends (240) a signal requesting the CPU to use the control, address, and data bus used to perform a large amount of memory read / write operations. Since it is a necessary signal to access a large amount of data, the CPU sends a signal to the DMA controller to acknowledge the use of the control and address and data bus (250). At this time, the DMA controller accesses the memory until the camera of the mobile phone ends the shooting and stores the data in the built-in / external storage device (260, 270). When the cellular phone camera finishes photographing, the DMA controller terminates the data access and transfers the bus authority to the CPU (270).

Although not shown in FIGS. 1 and 2, a signal detector for transmitting a signal between a storage device of a mobile phone camera module and a central processing unit (CPU) according to the present invention; A signal transmitter for transmitting a signal between the central processing unit and a direct memory access (DMA) controller; An access unit for reading data between the DMA controller and a storage device of the camera module; A storage unit for reading / writing data between the DMA controller and the internal / external storage device, and a display unit for writing data to the display storage device in the DMA controller.

The present invention may have different access times depending on the performance of the CPU of the mobile phone. Therefore, the access time according to the performance of the mobile phone is proportional to the CPU performance and the access time of the DMA controller. The present invention can calculate the storage time from the start to the end of shooting in a method of accessing data photographed from a cellular phone camera.

Claims (12)

Transmitting signals between a storage device of the mobile phone camera module and a central processing unit (CPU);
Passing signals between the central processing unit and a direct memory access (DMA) controller;
Reading and delivering data between the DMA controller and a storage device of the camera module;
A data read / write transfer step between the DMA controller and an internal / external storage device; And the data write transfer step between the DMA controller and the display device
A method for accessing shooting data from a mobile phone camera The method according to claim 1,
When the mobile phone CPU receives a signal from the mobile phone camera module to start shooting, the CPU includes a step of preparing to read data of the storage device of the camera module, a method of accessing the shooting data from the mobile phone camera The method according to claim 1,
The mobile phone CPU and the DMA controller allow the CPU to read the image data of the camera module completely to the DMA controller. In order to execute this, there is a method of accessing photographed data from a mobile phone camera including a step of requesting and accepting the use of data and address and control bus of the DMA controller The method according to claim 1,
A mobile phone DMA controller is a method of reading data from a storage device in a mobile phone camera module and accessing shooting data from a mobile phone camera, including writing to an internal / external storage device The method according to claim 1,
A method for accessing photographed data from a mobile phone camera including a step of reading data from an internal / external storage device and writing data to a display device, The method according to claim 1,
A method for accessing photographed data from a mobile phone camera including a step of displaying data read from a storage device of a mobile phone camera module through a DMA controller on a mobile phone display device A signal detector for transmitting a signal between a storage device of the mobile phone camera module and a central processing unit (CPU);
A signal transmitter for transmitting a signal between the central processing unit and a direct memory access (DMA) controller;
An access unit for reading data between the DMA controller and a storage device of the camera module;
A storage unit for reading and writing data between the DMA controller and the internal / external storage device and storing the data;
A device for performing data access processing from a mobile phone camera to a display device including a display unit for writing data to the display storage device by the DMA controller 8. The method of claim 7,
The detecting unit may be a device for receiving data from the cellular phone camera and receiving data from the cellular phone camera and performing data access processing from the cellular phone camera to the display device, 8. The method of claim 7,
The mobile unit CPU of the mobile unit delegates the entire rights through the DMA controller because the mobile phone CPU takes a lot of load when the CPU directly reads / writes a large amount of memory. Thus, the CPU is a device that processes data access from the mobile phone camera to the display device, which sends a read command to the direct memory access (DMA) controller 8. The method of claim 7,
The access unit includes a mobile phone DMA controller that accesses data from the cellular phone camera to the display device by accessing the memory until the camera ends shooting and stores the data in the built-in / external storage device 8. The method of claim 7,
Wherein the DMA controller is a device for performing data access processing from a mobile phone camera to a display device for reading / writing data to / from an internal / external storage device, 8. The method of claim 7,
The display unit is a device for performing a data access process from a mobile phone camera to a display device so that a mobile phone DMA controller transmits a memory to a display device and displays an image on a mobile phone screen

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