WO2005104514A1 - Procede et dispositif permettant de photographier avec un telephone mobile - Google Patents

Procede et dispositif permettant de photographier avec un telephone mobile Download PDF

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Publication number
WO2005104514A1
WO2005104514A1 PCT/CN2004/000392 CN2004000392W WO2005104514A1 WO 2005104514 A1 WO2005104514 A1 WO 2005104514A1 CN 2004000392 W CN2004000392 W CN 2004000392W WO 2005104514 A1 WO2005104514 A1 WO 2005104514A1
Authority
WO
WIPO (PCT)
Prior art keywords
image data
camera
preview
gsp
mobile phone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2004/000392
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English (en)
Chinese (zh)
Inventor
Rong Zhang
Changqing Ye
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huizhou TCL Mobile Communication Co Ltd
Original Assignee
Huizhou TCL Mobile Communication Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huizhou TCL Mobile Communication Co Ltd filed Critical Huizhou TCL Mobile Communication Co Ltd
Priority to PCT/CN2004/000392 priority Critical patent/WO2005104514A1/fr
Publication of WO2005104514A1 publication Critical patent/WO2005104514A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00307—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a mobile telephone apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0034—Details of the connection, e.g. connector, interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0034—Details of the connection, e.g. connector, interface
    • H04N2201/0046—Software interface details, e.g. interaction of operating systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0065—Converting image data to a format usable by the connected apparatus or vice versa
    • H04N2201/0068—Converting from still picture data

Definitions

  • the present invention relates to the technical field of imaging of mobile communication terminals, and in particular, to a method of imaging a mobile phone and an imaging device used in a mobile phone. Background technique
  • Camera-capable mobile phones are not only integrated with functions such as calling and video, but also easy to carry, so that people can not only use the mobile phone to call anytime, anywhere, but also take photos or videos anytime, anywhere, and take the photos or video streams Upload it to the Internet, or send it to the mobile phone or e-mail of relatives and friends to share the fun with relatives and friends.
  • FIG. 1A it is a block diagram of a device related to a camera function in a conventional mobile phone.
  • the mobile phone baseband CPU 2 directly controls the camera 3's shooting, compression, and operation of transmitting images to the LCD display 1. Therefore, the program of the camera function When running, it often brings a lot of load to the mobile phone system and affects the basic functions of the mobile phone. If there is an incoming call while the camera program is running, the baseband CPU2 may not be able to start the call processing program normally because it takes too much time with the camera function program. Therefore, although the camera function is added to the mobile phone, the camera function affects Basic functions (such as calling).
  • Basic functions such as calling
  • FIG. 1B it is a block diagram of another existing camera-related device in a mobile phone.
  • a mobile phone graphics processing chip 4 is added between the baseband CPU2 and the camera 3, and the mobile phone graphics processing chip 4 and the baseband CPU2 are added.
  • the image sensor (not shown) in the camera 3 and the LCD display 1 are connected.
  • an object of the present invention is to provide a mobile phone camera method, which can reduce the CPU time occupied by a mobile phone when running a camera program without adding a mobile phone graphics processing chip, without affecting At the same time as the basic functions of the mobile phone, it achieves better image quality and faster preview speed, thereby reducing the difficulty and cost of manufacturing a camera-capable mobile phone.
  • the present invention provides a mobile phone camera method including: Step S11: The central processing unit sets the DMA controller and the GSP interface to a preview mode capable of receiving and processing preview image data, and sends a preview instruction to all The GSP interface described above; step S12: the GSP interface sends a preview control command to the camera through the I2C bus, and receives preview image data output by the camera;
  • Step S13 the DMA controller receives the preview image data output from the GSP interface and stores the preview image data in the DMA buffer area;
  • Step S14 when the DMA buffer area is full, the DMA controller notifies the central processing unit in an interrupt manner;
  • Step S15 The central processing unit displays the preview image data on a display screen.
  • the step S12 further includes a step S121: the GSP interface converts the format of the received preview image data into the format of the preview image data required for the display screen display and outputs; and the GSP interface
  • the format of the received preview image data is RGB888 format; the format of the preview image data required for display screen display is RGB565 format.
  • the mobile phone camera method of the present invention further includes:
  • Step S16 The central processing unit sets the GSP interface to a photographing mode capable of receiving and processing photographic image data, and sends a photographing instruction to the GSP interface. Sudden
  • Step S17 a step in which the GSP interface sends a photographing control command to the camera through the I2C bus, and receives photographed image data output by the camera;
  • Step S18 a step in which the DMA controller receives the photographed image data output by the GSP interface and stores it in a DMA buffer area;
  • Step S19 a step of the DMA controller transmitting the photographed image data in an image buffer
  • Step S20 The central processing unit soft-decodes the photographed image data and displays it on the display screen or saves the data.
  • the format of the captured image data is a JPEG format.
  • the present invention directly uses the baseband serial port of the mobile phone to implement the camera function.
  • the CPU presets the DMA controller and GSP, and sends a preview or camera instruction to the GSP interface on the baseband.
  • Most of the process of the camera program can run automatically.
  • the CPU only processes the final image during the entire process, such as displaying the RGB565 format data used for browsing to the display, and decoding the JPEG format data used for taking pictures, displaying the image to the display, or saving.
  • the camera function program when running, it generally does not occupy more than 50% of the CPU time, which reduces the system load.
  • the present invention also provides a camera device used in a mobile phone, which is characterized in that the camera device is connected to a central processing unit, a display screen, and a camera, and includes a GSP interface and a DMA controller connected in sequence;
  • the camera device described above operates in a camera mode, and the camera mode includes the following preview modes:
  • the central processing unit sets the DMA controller and the GSP interface so that it can receive and process preview image data, and sends a preview instruction to the GSP interface;
  • the GSP interface sends a preview control command to the camera through the I2C bus, and receives preview image data output by the camera;
  • the DMA controller receives preview image data output from the GSP interface, and The preview image data is stored in a DMA buffer area, and when the DMA buffer area is full, the central processing unit is notified in an interrupt manner, and the latter displays the preview image data on the display screen.
  • the preview image data received by the GSP interface is RGB888 format data, and the RGB888 format data is converted into RGB565 format data and output.
  • the camera device in the mobile phone of the present invention further includes an image buffer.
  • the camera mode includes the following camera modes:
  • the central processing unit resets the GSP interface so that it can receive and process photographic image data, and sends a photographing instruction to the GSP interface;
  • the GSP interface sends a camera control command to the camera through the I2C bus, receives camera image data output by the camera, and stores the camera image data into the DMA buffer area through the DMA controller;
  • the DMA controller separately stores the photographed image data in the image buffer, and the central processing unit soft-decodes the photographed image data, and displays it on the display screen or Save it.
  • the image buffer is a JPEG image buffer.
  • the design method provided by the present invention, appropriate design is performed, and the central processing unit, GSP interface, DMA controller, and JPEG image buffer are coordinated to complete the camera function.
  • the invention only uses the existing baseband processing capabilities to process and display the video data stream, without adding an additional image processing chip, and without increasing the burden on the CPU. It can not only achieve better image preview effects, but also take pictures. You can take pictures with good image quality in JPEG format and save them in your phone. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1A is a block diagram of a device related to a camera function in a conventional mobile phone
  • FIG. 1B is a block diagram of another camera-related device in a conventional mobile phone
  • FIG. FIG. 2A is a flowchart of a first embodiment of a mobile phone camera method provided by the present invention
  • FIG. 2B is a flowchart of a second embodiment of a mobile phone camera method provided by the present invention
  • FIG. 3A is a camera phone in the mobile phone of the present invention A block diagram of a first embodiment of the device
  • FIG. 3B is a block diagram of a second embodiment of the camera device in the mobile phone of the present invention.
  • the mobile phone camera method of the present invention is developed on the ADI hardware platform and the TTPcom software platform.
  • the program of the entire camera function generally only consumes less than 30% of the CPU time.
  • FIG. 2A is a flowchart of a first embodiment of a mobile phone camera method provided by the present invention; it includes 5 steps such as S11 to S15, and the details are as follows:
  • Step S11 The central processing unit sets the DMA controller and the GSP interface to a preview mode capable of receiving and processing preview image data, and sends a preview instruction to the GSP interface.
  • GSP interface 24 that is, the universal serial interface is a multifunctional serial port, which can run automatically independently of the CPU, and its communication protocol is programmable.
  • GSP interface 24 Through the skillful processing of the program code, see Figure 4 to make the execution length of the communication protocol code variable, so that the sampling points of the data waveform have a certain self-adaptation ability, so that it can adapt to higher-speed data.
  • the characteristics of serial data and GSP instruction execution time are combined, and the data sampling point is appropriately advanced so that it can receive double the data.
  • the central processing unit sets the DMA controller and the GSP interface to a preview mode capable of receiving and processing the 'preview image data', that is, the communication protocol used when the DMA controller and the GSP interface run preview.
  • This setting enables the DMA controller and the GSP The interface can recognize another image, receive preview image data output by the camera, and process the image data.
  • Step S12 The GSP interface sends a preview control command to the camera through the I2C bus, and receives preview image data output by the camera.
  • the camera converts the captured image into RGB888 format data, and Output through the control of GSP interface.
  • a step S121 is further included.
  • the SP: GSP interface receives the data while discarding part of the data that does not affect the image quality, and receives the RGB888 format data transmitted by the camera, and converts it into the display required by the LCD. Format, that is, RGB565 format data.
  • Step S13 The DMA controller receives the preview image data output from the GSP interface and stores the preview image data in the DMA buffer area.
  • the DMA buffer receives RGB565 format data under the control of the DMA controller.
  • Step S14 When the DMA buffer area is full, the DMA controller notifies the central processing unit in an interrupt manner.
  • RGB565 format data is sent directly to the LCD display screen through the DMA controller.
  • the image data bypasses the display cache of the system.
  • Step S15 The central processing unit displays the preview image data on a display screen.
  • a new refresh mechanism is adopted on the LCD display screen: other refresh requests are shielded so that the image data stream from the camera 30 has the highest priority for the LCD to avoid screen conflicts; through such settings, The invention has better image quality and faster preview speed on the LCD display.
  • the LCD display screen 10 has a size of 128 * 160 pixels, it can reach 11 frames / second.
  • FIG. 2B is a flowchart of a second embodiment of the mobile phone camera method provided by the present invention, including 10 steps from S11 to S20, which adds a photographing function to the preview function of the first embodiment of the mobile phone camera method Therefore, steps S11 to S15 in this embodiment are the same as steps S11 to S15 in FIG. 2A, and are not repeated here.
  • the five steps of S16 to S20 in this embodiment are described in detail as follows:
  • Step S16 The central processing unit sets the GSP interface to a photographing mode capable of receiving and processing photographed image data, and sends a photographing instruction to the GSP interface.
  • the GSP interface can run automatically independently of the CPU, and its communication protocol is programmable.
  • the central processing unit resets the GSP to work in the JPEG image data receiving mode. under.
  • Step S17 The GSP interface sends a camera control command to the camera through the I2C bus, and receives camera image data output by the camera.
  • the camera converts the captured image into JPEG format data and outputs it through the control of the GSP interface.
  • Step S18 The DMA controller receives the photographed image data output from the GSP interface and stores it in the DMA buffer area.
  • the JPEG format data is buffered by the DMA controller.
  • Step S19 The DMA controller stores the photographed image data in an image buffer.
  • the DMA controller and the GSP interface work together to automatically store the JPEG image into the image buffer.
  • Separating the RGB format data from the JPEG format data in the DMA buffer 4021 and directly displaying the RGB format data by the DMA controller 402 will greatly simplify the operation of DMA control and increase the speed of data reception.
  • Step S20 The central processing unit soft-decodes the photographed image data and displays it on the display screen or saves it.
  • the baseband CPU when the program of the camera function is running, the baseband CPU only needs to send a preview or camera instruction to the GSP interface provided on the baseband.
  • the program for taking pictures can run automatically, including: GSP interface sends control commands to the camera, and receives the image data transmitted by the camera, and performs corresponding format conversion on the image data, and then displays it on the display screen through the DMA controller, or DMA controller and image buffer, which are finally displayed on the display after being soft decoded by the CPU On screen. Since these programs of the present invention run independently of the CPU, the programs of the camera function only occupy about 30% of the CPU time when running. At the same time, the present invention directly displays the image data on the display screen by the DMA controller, which simplifies the processing of the image data and improves the image preview speed. ⁇
  • a block diagram of a first embodiment of a mobile phone camera device includes an LCD display 10, a baseband CPU 20, a camera 30, and a mobile phone camera device 40 connected to each other.
  • the devices 40 all belong to the baseband circuit part.
  • the mobile phone camera 40 includes a GSP interface 401 and a DMA controller 402 connected in this order.
  • the DMA controller 402 includes a DMA buffer 4021.
  • the GSP interface 401 that is, the universal serial interface is a multifunctional serial port, which can run automatically independently of the CPU, and its communication protocol is programmable.
  • the baseband CPU 20 sends a preview command to the GSP interface 401.
  • the GSP interface 401 sends a control command to the camera 30 through the I2C bus 50. After the camera 30 converts the captured image into RGB888 data, it passes the GSP The interface 401 is downloaded to the DMA buffer 4021 of the mobile camera device 40.
  • the GSP interface 401 When previewing, the GSP interface 401 receives data while discarding part of the data that does not affect the image quality, and while receiving the RGB888 format data transmitted by the camera, it converts to the display format required by the LCD, that is, RGB565 format data.
  • the DMA buffer 4021 receives RGB565 format data under the control of the DMA controller 402 and displays it on the LCD display 10;
  • the frame synchronization information is hidden in the blue data information which is insensitive to the human eye, further reducing the data and processing time. Among them, due to the high-speed switching of the DMA controller 402, data can be prevented from being lost during the switching.
  • the RGB565 format data is sent directly to the LCD display through the DMA controller 402. 10 on.
  • the image data bypasses the display cache of the system.
  • a new refresh mechanism is adopted on the LCD display screen 10: other refresh requests are shielded, so that the image data stream from the camera 30 has the highest priority for the LCD to avoid screen conflicts; through such settings, the present invention It has better image quality and faster preview speed on the LCD.
  • the LCD display 10 is 128 * 160 pixels, it can reach 11 frames / second.
  • a block diagram of a mobile phone camera device and a second embodiment of the device according to the present invention includes an LCD display screen 10, a baseband CPU 20, a camera 30, and a mobile phone camera device 40 connected to each other. Both the baseband CPU 20 and the mobile phone camera device 40 belong to the baseband circuit portion.
  • the mobile phone camera device 40 includes a GSP interface 401, a DMA controller 402, and a JPEG image buffer 403 connected in this order.
  • the DMA controller 402 includes a DMA buffer 4021.
  • a JPEG image buffer 403 is added on the basis of the first embodiment, so that the mobile phone has a photographing function.
  • the central processing unit In the photographing mode in the camera mode, the central processing unit resets the GSP so that it works in the mode of receiving JPEG image data, and sends a photographing instruction to the GSP interface, the DMA and GSP works together to automatically store JPEG images into the image buffer.
  • the baseband CPU 20 sends a photographing instruction to the GSP interface 401, and the GSP interface 401 switches to another communication program for the characteristics of JPEG data, using unnecessary data transmission time to perform necessary data receiving program flow control and JPEG data merge operations, such as 2 One l-bit data is combined into one 16-bit data.
  • the GSP interface 401 sends a control command to the camera 30 through the I2C bus 50, and the camera 30 converts the captured image into JPEG format data.
  • the GSP interface receives the JPEG format data and buffers it through the DMA controller to download it. It enters the DMA buffer 4021, and then transfers to the JPEG image buffer 403.
  • the baseband CPU 20 performs soft decoding (SW JPEG Decode) on the JPEG image and displays it on the LCD display screen 10.
  • SW JPEG Decode soft decoding
  • RGB format data Separate RGB format data from JPEG format data in DMA buffer 4021.
  • the controller 402 directly displays the RGB format data, which greatly simplifies the DMA control operation and increases the data receiving speed.
  • the JPEG data used for taking pictures is buffered separately for soft decompression, display or storage in FLASH.
  • the CPU sends a preview or photographing instruction to a GSP interface provided on the baseband, and the GSP interface can automatically run.
  • the GSP program of the present invention runs independently of the CPU and performs technical processing in terms of data reception and processing, the present invention has a good performance in the camera function while reducing the burden on the CPU, that is, it achieves a relatively Good image quality and faster preview speed. Therefore, the present invention reduces the manufacturing difficulty and cost of camera-enabled mobile phones.
  • the baseband CPU only needs to send a preview or camera instruction to the GSP interface provided on the baseband when the camera function program is running.
  • the program can run automatically, so that the camera function program only consumes about 30% of the CPU time when running.
  • the present invention directly displays the image data on the display screen by the DMA controller, which simplifies the processing of the image data and achieves better image quality and faster preview speed. Therefore, the present invention reduces the manufacturing difficulty and cost of camera-enabled mobile phones.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Studio Devices (AREA)
  • Telephone Function (AREA)

Abstract

L'invention se rapporte à un procédé et à un dispositif permettant de photographier avec un téléphone mobile. Lors de l'exécution des programmes permettant d'effectuer les fonctions de photographie, l'unité centrale doit uniquement envoyer les instructions de prévisualisation ou de photographie à l'interface GSP (port série général) montée sur la bande de base, les autres programmes associés relatifs à la prévisualisation ou à la photographie pouvant être exécutés automatiquement, ce qui implique que l'interface GSP envoie les instructions de commande à la caméra, reçoit les données image envoyées par la caméra et convertit les données image dans le format correspondant, l'unité de commande DMA (accès mémoire direct) informant l'unité centrale au moyen d'une interruption, les données images de prévisualisation étant affichées sur l'afficheur par l'unité centrale ou affichées sur l'afficheur par l'intermédiaire de l'unité de commande DMA, du tampon d'images et du décodage pondéré de l'unité centrale. L'invention est telle que l'unité centrale ne requiert que 30 % du temps lors de l'exécution des programmes de la fonction de photographie ce qui permet de réduire la charge système ainsi que le coût de production du téléphone mobile.
PCT/CN2004/000392 2004-04-23 2004-04-23 Procede et dispositif permettant de photographier avec un telephone mobile Ceased WO2005104514A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2004/000392 WO2005104514A1 (fr) 2004-04-23 2004-04-23 Procede et dispositif permettant de photographier avec un telephone mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2004/000392 WO2005104514A1 (fr) 2004-04-23 2004-04-23 Procede et dispositif permettant de photographier avec un telephone mobile

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WO2005104514A1 true WO2005104514A1 (fr) 2005-11-03

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PCT/CN2004/000392 Ceased WO2005104514A1 (fr) 2004-04-23 2004-04-23 Procede et dispositif permettant de photographier avec un telephone mobile

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1379337A (zh) * 2001-04-02 2002-11-13 华邦电子股份有限公司 直接存储器存取至通用串行总线的转换电路及传输方法
JP2002344870A (ja) * 2001-05-15 2002-11-29 Casio Comput Co Ltd モニタ表示装置及びモニタ表示方法
CN1436333A (zh) * 2000-06-09 2003-08-13 摩托罗拉公司 支持无线手持多媒体设备的集成处理器平台
WO2004003760A1 (fr) * 2002-06-27 2004-01-08 Intel Corporation Procede et appareil permettant de transferer des informations
US20040064606A1 (en) * 2002-09-26 2004-04-01 Mitsubishi Denki Kabushi Kaisha Memory system allowing fast operation of processor while using flash memory incapable of random access
CN1487730A (zh) * 2002-08-30 2004-04-07 ��ķ�ɷ����޹�˾ 图像显示系统以及显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1436333A (zh) * 2000-06-09 2003-08-13 摩托罗拉公司 支持无线手持多媒体设备的集成处理器平台
CN1379337A (zh) * 2001-04-02 2002-11-13 华邦电子股份有限公司 直接存储器存取至通用串行总线的转换电路及传输方法
JP2002344870A (ja) * 2001-05-15 2002-11-29 Casio Comput Co Ltd モニタ表示装置及びモニタ表示方法
WO2004003760A1 (fr) * 2002-06-27 2004-01-08 Intel Corporation Procede et appareil permettant de transferer des informations
CN1487730A (zh) * 2002-08-30 2004-04-07 ��ķ�ɷ����޹�˾ 图像显示系统以及显示装置
US20040064606A1 (en) * 2002-09-26 2004-04-01 Mitsubishi Denki Kabushi Kaisha Memory system allowing fast operation of processor while using flash memory incapable of random access

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