WO2010038341A1 - Image processing device - Google Patents

Image processing device Download PDF

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Publication number
WO2010038341A1
WO2010038341A1 PCT/JP2009/003512 JP2009003512W WO2010038341A1 WO 2010038341 A1 WO2010038341 A1 WO 2010038341A1 JP 2009003512 W JP2009003512 W JP 2009003512W WO 2010038341 A1 WO2010038341 A1 WO 2010038341A1
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WO
WIPO (PCT)
Prior art keywords
moving image
image processing
image data
brightness
display
Prior art date
Application number
PCT/JP2009/003512
Other languages
French (fr)
Japanese (ja)
Inventor
村田竜一
小林豊
平井久志
佐藤光弘
Original Assignee
パナソニック株式会社
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Publication of WO2010038341A1 publication Critical patent/WO2010038341A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • H04N1/00885—Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
    • H04N1/00888—Control thereof
    • H04N1/00896—Control thereof using a low-power mode, e.g. standby
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
    • H04W52/027—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components by controlling a display operation or backlight unit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
    • 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
    • H04N2201/0096—Portable devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to an image processing apparatus suitable for use in an electronic device provided with a brightness-controllable display such as a mobile phone.
  • Patent Document 1 in a liquid crystal display device provided with a backlight in which the brightness of the backlight as the display means is switched in three or more steps, an optimal frame frequency is obtained so that the flicker rate becomes zero according to the switched brightness.
  • the technology which reduces the power consumption of a liquid crystal display device is described by switching to.
  • the above-described technology only aims to reduce the power consumption by lowering the frame frequency for driving the display panel together with the decrease in the luminance of the backlight, and there is a demand for further reduction of the power consumption.
  • a mobile phone there is a demand to make the time available for one charge as long as possible.
  • the present invention has been made in view of such circumstances, and provides an image processing apparatus capable of further promoting power saving obtained by changing a frame frequency according to a decrease in backlight brightness and the brightness of the backlight.
  • the purpose is to
  • the image processing apparatus is characterized in that the moving image is displayed based on the display means for displaying the decoded moving image data, a brightness adjusting means for adjusting the brightness of the display means, and the brightness adjusted by the brightness adjusting means. And moving image processing means for changing data decoding processing.
  • the moving image processing means adjusts a frame rate of the moving image data as a change of the decoding process.
  • the processing amount per unit time can be reduced, and power saving can be achieved.
  • the moving image processing means adjusts the stage of decoding completion in the case of content data which is compressed so that the moving image data can be expanded stepwise as a change of the decoding process.
  • the amount of processing can be reduced and power saving can be achieved by treating as decoding completion in the middle of the decoding process.
  • the moving image processing means adjusts the number of components constituting the color space of the moving image data, which is a target of the decoding process, as a change of the decoding process.
  • the amount of decoding processing can be reduced, and power saving can be achieved.
  • the image processing apparatus further includes storage means for storing moving image data having a first resolution and moving image data having a second resolution lower than the first resolution, wherein the moving image processing means The moving image data having the first resolution and the moving image data having the second resolution are switched based on the brightness adjusted by the brightness adjusting means.
  • two moving image data having different resolutions are separately stored, and when adjusting to low luminance, moving image data having low resolution is used, so that the processing amount can be reduced and power saving can be achieved.
  • the moving image processing means adjusts the decoding process of the moving image data when the display means displays the moving image data and image data different from the moving image data.
  • the display device further includes a display control unit that controls display of the moving image data on the display unit, and the display control unit displays the moving image data based on the brightness adjusted by the brightness adjusting unit.
  • the display control of the moving image data is changed based on the brightness adjusted by the brightness adjusting means. Therefore, the control can be performed with the processing amount reduced smaller than usual, and power saving can be achieved.
  • the display control means performs color reduction processing on the decoded moving image data, changing display control of moving image data, and changes a transfer rate to the display means.
  • the display control means decodes the image data by the number of frames, changing display control of moving image data, and transfers only data of a number of frames smaller than the number of frames to the display means.
  • the display control means changes the display control of the moving image data, reduces the number of color components of the decoded moving image data, and transfers it to the display means.
  • the apparatus further comprises: input means for receiving an input instruction; and time monitoring means for monitoring whether or not the input instruction to the input means has a predetermined time, and the brightness adjusting means comprises the time monitoring means. The brightness of the display means is adjusted according to the monitoring result of
  • the brightness adjustment means adjusts the brightness of the display means when there is no input instruction for a predetermined time, it is possible to reduce the power consumption at the time of no operation, and it is possible to save power as a whole.
  • the display device further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery that supplies power to each unit, and the brightness adjusting unit displays the display according to the detection result of the battery remaining amount detecting unit. Adjust the brightness of the means.
  • the brightness adjustment means adjusts the brightness of the display means according to the battery remaining amount, so power consumption can be reduced when the battery remaining amount is reduced, and power saving can be achieved as a whole.
  • the apparatus further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery supplying power to each unit, and the decoding process of the moving image data is performed according to the detection result of the battery remaining amount detecting unit. change.
  • the decoding process of the moving image data is changed according to the battery remaining amount, so power consumption can be reduced when the battery remaining amount is reduced, and power saving can be achieved as a whole.
  • the brightness adjusting unit has a plurality of stages of different brightness
  • the moving image processing unit processes the moving image data at a frame rate corresponding to the brightness adjusted by the brightness adjusting unit.
  • the brightness adjustment can be performed in two or more stages, and the decoding process is changed based on the adjusted brightness, so power saving can be achieved.
  • the moving image is displayed based on the display step of displaying the decoded moving image data, the brightness adjustment step of adjusting the brightness in the display step, and the brightness adjusted in the brightness adjustment step. And d) a moving image processing step of changing a decoding process of the image data.
  • the present invention can provide an image processing apparatus capable of further promoting power saving obtained by changing the frame frequency in accordance with the decrease in the brightness of the backlight as the display means and the brightness of the backlight.
  • Block diagram showing a schematic configuration of the image processing apparatus according to Embodiment 1 of the present invention The figure for demonstrating the frame rate adjustment of the moving image data in the image processing apparatus of FIG.
  • the figure for demonstrating the frame rate adjustment of the moving image data in the image processing apparatus of FIG. Flow chart for explaining the operation of the image processing apparatus of FIG. 1
  • FIG. 1 is a block diagram showing a schematic configuration of an image processing apparatus according to Embodiment 1 of the present invention. It is assumed that the image processing device 1 of the present embodiment is applied to a mobile phone. As shown in FIG. 1, the image processing apparatus 1 according to the present embodiment includes a user input unit 2, a time monitoring unit 3, a luminance control unit 5, a moving image control unit 6, a decoder 7, and a display control unit 9. , A background display control unit 10, and a display 11 capable of controlling brightness (hereinafter, simply referred to as "display").
  • the user input unit 2 receives an input instruction by key operation or the like.
  • the time monitoring unit 3 monitors whether there is no input instruction to the user input unit 2 for a certain period of time, and notifies the luminance control unit 5 to that effect when there is no input instruction after the certain period of time.
  • the background display control unit 10 controls to display still image data or moving image data other than moving images controlled by the moving image control unit 6.
  • the brightness control unit 5 controls the brightness of the display 11 mounted on the mobile phone to which the image processing apparatus 1 of the present embodiment is applied.
  • the brightness control unit 5 adjusts the brightness of the backlight when the display 11 is, for example, a liquid crystal display, and adjusts the brightness of the organic EL display itself when the display 11 is an organic EL display.
  • the display 11 is not limited to a liquid crystal display or an organic EL display, and may be another display.
  • the brightness of the backlight of the display 11 is set to two levels of “full light” and “low light”.
  • the brightness control unit 5 When the brightness control unit 5 receives a notification from the time monitoring unit 3 that there is no input instruction by the user operation, the brightness control unit 5 switches the brightness of the backlight of the display 11 from “all lights” to “lights”. Switch to "all lights” when notified that there is an input instruction in the status.
  • the moving image control unit 6 performs control to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5.
  • the frame rate of moving image data is adjusted. For example, when the luminance of the display 11 is switched to "full light", the number of drawn frames per unit time is adjusted to 6 fps as shown in FIG. 2, and when switched to "light", as shown in FIG. As shown, the number of drawn frames per unit time is adjusted to 4 fps.
  • the decoder 7 and the display control unit 9 operate, and the integration operation time per unit becomes shorter as the number of drawn frames becomes smaller. Power consumption is reduced by shortening the operation time of the decoder 7 and the display control unit 9. In the state of slight lighting, the screen of the display 11 becomes somewhat difficult to see, and even with a low frame rate, it is possible to give the same viewing feeling as drawing at a normal frame rate.
  • the moving image control unit 6 and the decoder 7 constitute moving image processing means 8, and the moving image processing means 8 adjusts the frame rate of moving image data as a change of decoding processing of moving image data (1) moving image
  • a method of adjusting the stage of decoding and (2) a method of adjusting color components for decoding moving image data may be mentioned.
  • Scalable compression is a compression method that can be decoded stepwise and can improve image quality by performing decoding stepwise.
  • the moving image processing means 8 constituted by the moving image control unit 6 and the decoder 7 is such that the display 11 is moving image data and image data different from the moving image data (still image data of the background by the background display control unit 10 or When simultaneously displaying moving image data), decoding processing of both moving image data and background image data or decoding processing of only moving image data is performed.
  • the decoder 7 may use the same decoder for both the moving image control unit 6 and the background display control unit 10, or may use separate decoders.
  • the display control unit 9 controls the display 11 to display moving image data decoded by the decoder. At this time, the display control unit 9 controls the display control of the moving image data decoded by the decoder based on the luminance adjusted by the luminance control unit 5 and the display control of the moving image data at the adjusted frame rate. Do. Further, the display control unit 9 may perform display control from the moving image control unit 6 and the background display control unit 10 independently. As an example, the moving image control unit 6 decodes and displays the animation of the character on a part of the screen, and the background display control unit 10 decodes and displays the standby screen, menu screen, status display icon, etc. on the entire screen. I do. The display control unit 9 controls the display 11 to display an animation of a character, a standby screen, a menu screen, a status display icon, and the like.
  • FIG. 4 is a flowchart showing an operation in the case of adjusting a frame rate as a change in the decoding process of moving image data.
  • step S1 it is determined whether or not moving image drawing processing
  • step S2 no-operation detection is performed for a fixed time
  • step S3 the brightness of the backlight of the display 11 is set to the slight light level
  • step S4 user operation detection is performed.
  • step S6 step S5 If the user's operation is detected, full-light control is performed, the brightness of the display 11 is set to the full-light level, and the process proceeds to step S6 (step S5). If no operation for a predetermined time is detected and no user operation is detected, the process proceeds to step S6 without performing full light control or small light control.
  • step S6 it is determined whether the brightness control state is a slight light or a full light. In this determination, if the luminance control state is full lighting, decoding processing at a normal frame rate is performed as shown in FIG. 2 (step S7), and the moving image is displayed on the display 11 (step S8). On the other hand, if the luminance control state is a slight light, for example, decoding processing at a low frame rate is performed as shown in FIG. 3 (step S9), and the moving image is displayed on the display 11 (step S8). After the display process with the full light or the slight light is performed, the process returns to step S1 and the same process as described above is repeated.
  • the brightness control unit 5 sets the brightness of the display 11 to the slight light level when no operation is detected for a predetermined time in the moving image drawing process.
  • the light control is performed, and when no operation is detected for a predetermined period of time and the user operation is detected, the full light control is performed to set the brightness of the display 11 to the full light level. If the luminance control state is all lights, decoding processing is performed at the normal frame rate, if the luminance control state in the luminance control unit 5 is slight lighting, decoding processing is performed at the low frame rate, and the display control unit 9
  • the moving image data decoded by the processing means 8 is displayed.
  • the frame rate of moving image data is adjusted based on the brightness adjustment, but the following method can also be adopted. That is, a memory (storage means, not shown) for storing moving image data having a first resolution and moving image data having a second resolution lower than the first resolution is provided, and the moving image processing means 8 Based on the luminance adjusted by the luminance control unit 5, the moving image data having the first resolution and the moving image data having the second resolution are replaced. For example, when the light control of the display 11 is performed, moving image data having a first resolution is replaced with moving image data having a second resolution.
  • the luminance adjustment is performed in two stages of "full light” and “minute light”, but may be performed in three or more stages.
  • the luminance control unit 5 has a plurality of stages with different luminances, and the moving image processing means 8 performs moving images at a frame rate corresponding to the luminance adjusted by the luminance control unit 5 Process data
  • FIG. 5 is a block diagram showing a schematic configuration of an image processing apparatus according to Embodiment 2 of the present invention.
  • the image processing apparatus 1A of the present embodiment is provided with a battery remaining amount detection unit 4.
  • the battery remaining amount detection unit 4 detects a voltage of a battery (not shown) mounted on a mobile phone to which the image processing apparatus 1A of the present embodiment is applied, and outputs a detection value.
  • the same parts as those of the image processing apparatus 1 of the first embodiment are designated by the same reference numerals, and the description thereof is omitted.
  • the battery remaining amount detection unit 4 notifies the luminance control unit 5 when the battery remaining amount or the estimated usable time becomes equal to or less than a predetermined value.
  • the brightness control unit 5 adjusts the brightness of the backlight when the display 11 is, for example, a liquid crystal display, and adjusts the brightness of the organic EL display itself when the display 11 is an organic EL display.
  • the brightness control unit 5 switches the brightness of the backlight of the display 11 from “full light” to "slight light” when receiving notification from the battery remaining amount detection unit 4 that the battery remaining amount is equal to or less than the predetermined value. In the state of "light", when the notification that the battery remaining amount exceeds the predetermined value or the estimated usable time has been recovered to the predetermined value or more by charging is switched to "all lights".
  • control is performed to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5.
  • decoding processing color components to be decoded are adjusted to only partial color components. For example, when the luminance of the display 11 is switched to "full light”, adjustment is made so that all components of the luminance, blue difference component and red difference component are decoded, and when switched to "light” Adjustment is performed only to the luminance component, or adjustment is performed so as to decode only the luminance and the blue difference component, or the luminance and the red difference component.
  • the decoder 7 operates to decode each frame, and the power consumption is reduced by shortening the decoding processing time required per frame. In the state of slight lighting, the screen of the display 11 becomes somewhat difficult to see, and even on a screen that is difficult to see, even with the decoding processing by a part of luminance or color components, it is possible to give the same viewing feeling as drawing normal decoding results. It is.
  • the display control unit performs control to display moving image data decoded by the decoder on the display 11.
  • Embodiment 4 The configuration of the image processing apparatus according to the fourth embodiment of the present invention is the same as the configuration of the image processing apparatus 1 according to the first embodiment, and the description will be omitted.
  • control is performed to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5.
  • the decoding stage is adjusted so that the decoding process being performed in stages is treated as the decoding completion in the middle stage as the decoding process.
  • the decoding process completed by repeating decoding six times is adjusted to perform decoding six times repeatedly, and switched to "slight light”
  • the decoding process to be completed by repeating the decoding six times is adjusted to perform the decoding four times.
  • the decoder 7 operates to decode each frame, and the power consumption is reduced by shortening the decoding processing time required per frame. In the state of the dim light, the screen of the display 11 becomes slightly difficult to see, and even on the way of decoding, it is possible to give the same viewing feeling as drawing of a normal decoding result.
  • the display control unit performs control to display moving image data decoded by the decoder on the display 11.
  • the configuration of the image processing apparatus according to the fifth embodiment of the present invention is the same as the configuration of the image processing apparatus 1 according to the first embodiment, and the description will be omitted.
  • the decoder 7 performs a decoding process
  • the display control process in the display control unit 9 changes the display transfer rate according to the brightness setting by the brightness control unit 5.
  • the present invention is not limited to the above embodiment, and can be implemented with appropriate modifications.
  • the method of changing the decoding process of moving image data, the method of changing display control of moving image data, and the like in the above-described embodiment are an example, and combinations and various changes may be made within the scope of the effects of the present invention. Is possible. In addition, without departing from the scope of the object of the present invention, it is possible to appropriately change and implement.
  • the present invention has the effect that power saving obtained by changing the frame frequency according to the brightness of the backlight can be further promoted, and it is possible to provide an electronic device equipped with a brightness-controllable display such as a mobile phone. It is applicable.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Image Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Telephone Function (AREA)
  • Storing Facsimile Image Data (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Disclosed is an image processing device capable of promoting an increased reduction in energy consumption by reducing the backlight brightness and by changing the frame frequency according to the backlight brightness. A brightness control unit (5) sets the brightness of a display (11) to a low lighting level when no operation is detected for a prescribed period of time in a moving picture drawing process, and sets the brightness of the display (11) to a full lighting level when the prescribed period of time of no operation is not detected and user operation is detected. A moving picture processing means (8) performs decoding at a normal frame rate when the brightness control state of brightness control unit (5) is full lighting and performs decoding at a low frame rate when the brightness control state of the brightness control unit (5) is low lighting. A display control unit (9) displays the moving picture data decoded by the moving picture processing means (8).

Description

画像処理装置Image processing device
　本発明は、携帯電話等の輝度制御可能なディスプレイを備えた電子機器に用いて好適な画像処理装置に関する。 BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an image processing apparatus suitable for use in an electronic device provided with a brightness-controllable display such as a mobile phone.
　特許文献１には、表示手段としてのバックライトの輝度が３段階以上に切り換えられるバックライトを備えた液晶表示装置において、切り換えた輝度に応じてフリッカ率がゼロになるように、最適なフレーム周波数に切り換えることにより、液晶表示装置の消費電力を低減する技術が記載されている。 In Patent Document 1, in a liquid crystal display device provided with a backlight in which the brightness of the backlight as the display means is switched in three or more steps, an optimal frame frequency is obtained so that the flicker rate becomes zero according to the switched brightness. The technology which reduces the power consumption of a liquid crystal display device is described by switching to.
日本国特開２００８－１３４２９１号公報Japanese Patent Application Laid-Open No. 2008-134291
　しかしながら、上述した技術は、バックライトの輝度の低下と共に表示パネルを駆動するフレーム周波数を下げることで、消費電力の低減を図っているだけであり、更なる低消費電力化が要望されている。例えば、携帯電話では１回の充電で使用できる時間をできるだけ長くしたいという要望がある。 However, the above-described technology only aims to reduce the power consumption by lowering the frame frequency for driving the display panel together with the decrease in the luminance of the backlight, and there is a demand for further reduction of the power consumption. For example, in a mobile phone, there is a demand to make the time available for one charge as long as possible.
　本発明は、係る事情に鑑みてなされたものであり、バックライト輝度の低下やバックライトの輝度に応じてフレーム周波数を変えることで得られる省電力化をさらに推し進めることができる画像処理装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and provides an image processing apparatus capable of further promoting power saving obtained by changing a frame frequency according to a decrease in backlight brightness and the brightness of the backlight. The purpose is to
　本発明の画像処理装置は、デコード処理された動画像データを表示する表示手段と、前記表示手段の輝度を調整する輝度調整手段と、前記輝度調整手段で調整された輝度に基づき、前記動画像データのデコード処理を変更する動画像処理手段と、を備えた。 The image processing apparatus according to the present invention is characterized in that the moving image is displayed based on the display means for displaying the decoded moving image data, a brightness adjusting means for adjusting the brightness of the display means, and the brightness adjusted by the brightness adjusting means. And moving image processing means for changing data decoding processing.
　上記構成によれば、輝度調整手段で調整された輝度に基づいてデコード処理を変更するので、省電力化が可能となる。 According to the above configuration, since the decoding process is changed based on the brightness adjusted by the brightness adjusting means, power saving can be achieved.
　前記動画像処理手段は、デコード処理の変更として、前記動画像データのフレームレートを調整する。 The moving image processing means adjusts a frame rate of the moving image data as a change of the decoding process.
　上記構成によれば、動画像データのフレームレートを低くすることで、単位時間当たりの処理量が減り、省電力化が図れる。 According to the above configuration, by reducing the frame rate of moving image data, the processing amount per unit time can be reduced, and power saving can be achieved.
　前記動画像処理手段は、デコード処理の変更として、前記動画像データが段階的に展開できる圧縮が行われているコンテンツデータの場合、デコード完了の段階を調整する。 The moving image processing means adjusts the stage of decoding completion in the case of content data which is compressed so that the moving image data can be expanded stepwise as a change of the decoding process.
　上記構成によれば、デコード処理の途中でデコード完了として扱うことで、処理量が減り、省電力化が図れる。 According to the above configuration, the amount of processing can be reduced and power saving can be achieved by treating as decoding completion in the middle of the decoding process.
　前記動画像処理手段は、デコード処理の変更として、デコード処理の対象とする、前記動画像データの色空間を構成する成分の数を調整する。 The moving image processing means adjusts the number of components constituting the color space of the moving image data, which is a target of the decoding process, as a change of the decoding process.
　上記構成によれば、デコード対象の色成分数を減らすことで、デコード処理量が減り、省電力化が図れる。 According to the above configuration, by reducing the number of color components to be decoded, the amount of decoding processing can be reduced, and power saving can be achieved.
　また、上記構成において、第１の解像度を有する動画像データと、前記第１の解像度より低い第２の解像度を有する動画像データとを記憶する記憶手段をさらに備え、前記動画像処理手段は、前記輝度調整手段で調整された輝度に基づき、前記第１の解像度を有する動画像データと前記第２の解像度を有する動画像データとを差し替える。 Further, in the above configuration, the image processing apparatus further includes storage means for storing moving image data having a first resolution and moving image data having a second resolution lower than the first resolution, wherein the moving image processing means The moving image data having the first resolution and the moving image data having the second resolution are switched based on the brightness adjusted by the brightness adjusting means.
　上記構成によれば、解像度の異なる２つの動画像データを別々に記憶し、低い輝度に調整された場合に解像度の低い動画像データを使用するため、処理量が減り、省電力化が図れる。 According to the above configuration, two moving image data having different resolutions are separately stored, and when adjusting to low luminance, moving image data having low resolution is used, so that the processing amount can be reduced and power saving can be achieved.
　因みに、輝度が低い状態では表示画面が若干見難くなるので、通常よりも低いフレームレートや、解像度が低いまたは、一部の色成分のみの動画像表示データでも十分実用化が可能である。 Incidentally, since the display screen is somewhat difficult to see in a low luminance state, practical use is possible even with moving image display data having a frame rate lower than usual, a low resolution, or only a part of color components.
　また、上記構成において、前記動画像処理手段は、前記表示手段が前記動画像データと、前記動画像データとは異なる画像データを表示するとき、前記動画像データのデコード処理を調整する。 Further, in the above configuration, the moving image processing means adjusts the decoding process of the moving image data when the display means displays the moving image data and image data different from the moving image data.
　また、上記構成において、前記表示手段に対する前記動画像データの表示を制御する表示制御手段をさらに備え、前記表示制御手段は、前記輝度調整手段で調整された輝度に基づき、前記動画像データの表示制御を変更する。 Further, in the above configuration, the display device further includes a display control unit that controls display of the moving image data on the display unit, and the display control unit displays the moving image data based on the brightness adjusted by the brightness adjusting unit. Change control
　上記構成によれば、輝度調整手段で調整された輝度に基づいて動画像データの表示制御を変更するので、通常よりも処理量を減らしての制御となり、省電力化が可能となる。 According to the above configuration, the display control of the moving image data is changed based on the brightness adjusted by the brightness adjusting means. Therefore, the control can be performed with the processing amount reduced smaller than usual, and power saving can be achieved.
　前記表示制御手段は、動画像データの表示制御を変更として、前記デコード処理された動画像データを減色処理し、前記表示手段への転送レートを変化させる。 The display control means performs color reduction processing on the decoded moving image data, changing display control of moving image data, and changes a transfer rate to the display means.
　前記表示制御手段は、動画像データの表示制御を変更として、前記画像データをフレーム数分デコードし、前記表示手段へは該フレーム数より少ないフレーム数のデータのみ転送する。 The display control means decodes the image data by the number of frames, changing display control of moving image data, and transfers only data of a number of frames smaller than the number of frames to the display means.
　前記表示制御手段は、動画像データの表示制御を変更として、前記デコード処理された動画像データの色成分数を減らし、前記表示手段へ転送する。 The display control means changes the display control of the moving image data, reduces the number of color components of the decoded moving image data, and transfers it to the display means.
　また、上記構成において、入力指示を受付ける入力手段と、前記入力手段への入力指示が所定時間あるか否かを監視する時間監視手段と、をさらに備え、前記輝度調整手段は、前記時間監視手段の監視結果に応じて、前記表示手段の輝度を調整する。 In the above configuration, the apparatus further comprises: input means for receiving an input instruction; and time monitoring means for monitoring whether or not the input instruction to the input means has a predetermined time, and the brightness adjusting means comprises the time monitoring means. The brightness of the display means is adjusted according to the monitoring result of
　上記構成によれば、輝度調整手段は、入力指示が所定時間無い場合に表示手段の輝度を調整するので、無操作時における消費電力の低減が図れ、全体的に省電力化が可能となる。 According to the above configuration, since the brightness adjustment means adjusts the brightness of the display means when there is no input instruction for a predetermined time, it is possible to reduce the power consumption at the time of no operation, and it is possible to save power as a whole.
　また、上記構成において、各手段に電力を供給する電池の残量を検出する電池残量検出手段をさらに備え、前記輝度調整手段は、前記電池残量検出手段の検出結果に応じて、前記表示手段の輝度を調整する。 Further, in the above configuration, the display device further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery that supplies power to each unit, and the brightness adjusting unit displays the display according to the detection result of the battery remaining amount detecting unit. Adjust the brightness of the means.
　上記構成によれば、輝度調整手段は、電池残量に応じて表示手段の輝度を調整するので、電池残量低減時における消費電力の低減が図れ、全体的に省電力化が可能となる。 According to the above configuration, the brightness adjustment means adjusts the brightness of the display means according to the battery remaining amount, so power consumption can be reduced when the battery remaining amount is reduced, and power saving can be achieved as a whole.
　また、上記構成において、各手段に電力を供給する電池の残量を検出する電池残量検出手段をさらに備え、前記電池残量検出手段の検出結果に応じて、前記動画像データのデコード処理を変更する。 Further, in the above configuration, the apparatus further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery supplying power to each unit, and the decoding process of the moving image data is performed according to the detection result of the battery remaining amount detecting unit. change.
　上記構成によれば、電池残量に応じて動画像データのデコード処理を変更するので、電池残量低減時における消費電力の低減が図れ、全体的に省電力化が可能となる。 According to the above configuration, the decoding process of the moving image data is changed according to the battery remaining amount, so power consumption can be reduced when the battery remaining amount is reduced, and power saving can be achieved as a whole.
　また、上記構成において、前記輝度調整手段は、輝度の異なる複数の段階を有し、前記動画像処理手段は、前記輝度調整手段で調整された輝度に対応するフレームレートで前記動画像データを処理する。 Further, in the above configuration, the brightness adjusting unit has a plurality of stages of different brightness, and the moving image processing unit processes the moving image data at a frame rate corresponding to the brightness adjusted by the brightness adjusting unit. Do.
　上記構成によれば、２段階以上の輝度調整ができ、調整された輝度に基づいてデコード処理を変更するので、省電力化が可能となる。 According to the above configuration, the brightness adjustment can be performed in two or more stages, and the decoding process is changed based on the adjusted brightness, so power saving can be achieved.
　本発明の画像処理方法は、デコード処理された動画像データを表示する表示ステップと、前記表示ステップでの輝度を調整する輝度調整ステップと、前記輝度調整ステップで調整された輝度に基づき、前記動画像データのデコード処理を変更する動画像処理ステップと、を備えた。 In the image processing method according to the present invention, the moving image is displayed based on the display step of displaying the decoded moving image data, the brightness adjustment step of adjusting the brightness in the display step, and the brightness adjusted in the brightness adjustment step. And d) a moving image processing step of changing a decoding process of the image data.
　上記方法によれば、輝度調整ステップで調整された輝度に基づいてデコード処理を変更するので、省電力化が可能となる。 According to the above method, since the decoding process is changed based on the brightness adjusted in the brightness adjusting step, power saving can be achieved.
　本発明は、表示手段としてのバックライトの輝度の低下やバックライトの輝度に応じてフレーム周波数を変えることで得られる省電力化をさらに推し進めることができる画像処理装置を提供できる。 The present invention can provide an image processing apparatus capable of further promoting power saving obtained by changing the frame frequency in accordance with the decrease in the brightness of the backlight as the display means and the brightness of the backlight.
本発明の実施の形態１に係る画像処理装置の概略構成を示すブロック図Block diagram showing a schematic configuration of the image processing apparatus according to Embodiment 1 of the present invention 図１の画像処理装置における動画像データのフレームレート調整を説明するための図The figure for demonstrating the frame rate adjustment of the moving image data in the image processing apparatus of FIG. 図１の画像処理装置における動画像データのフレームレート調整を説明するための図The figure for demonstrating the frame rate adjustment of the moving image data in the image processing apparatus of FIG. 図１の画像処理装置の動作を説明するためのフローチャートFlow chart for explaining the operation of the image processing apparatus of FIG. 1 本発明の実施の形態２に係る画像処理装置の概略構成を示すブロック図Block diagram showing a schematic configuration of an image processing apparatus according to Embodiment 2 of the present invention
　以下、本発明を実施するための好適な実施の形態について、図面を参照して詳細に説明する。 Hereinafter, preferred embodiments for carrying out the present invention will be described in detail with reference to the drawings.
　（実施の形態１）
　図１は、本発明の実施の形態１に係る画像処理装置の概略構成を示すブロック図である。本実施の形態の画像処理装置１は、携帯電話機に適用したものとする。図１に示すように、本実施の形態の画像処理装置１は、ユーザ入力部２と、時間監視部３と、輝度制御部５と、動画制御部６と、デコーダ７と、表示制御部９と、背景表示制御部１０と、輝度制御可能なディスプレイ（以下、単に「ディスプレイ」と言う。）１１とを備える。ユーザ入力部２は、キー操作などによる入力指示を受け付ける。時間監視部３は、ユーザ入力部２への入力指示が一定時間無いかどうか監視し、一定時間を超えて入力指示が無い場合は、その旨を輝度制御部５に通知する。背景表示制御部１０は、動画制御部６により制御される動画像以外の静止画像データもしくは動画像データを表示制御する。 Embodiment 1
FIG. 1 is a block diagram showing a schematic configuration of an image processing apparatus according to Embodiment 1 of the present invention. It is assumed that the image processing device 1 of the present embodiment is applied to a mobile phone. As shown in FIG. 1, the image processing apparatus 1 according to the present embodiment includes a user input unit 2, a time monitoring unit 3, a luminance control unit 5, a moving image control unit 6, a decoder 7, and a display control unit 9. , A background display control unit 10, and a display 11 capable of controlling brightness (hereinafter, simply referred to as "display"). The user input unit 2 receives an input instruction by key operation or the like. The time monitoring unit 3 monitors whether there is no input instruction to the user input unit 2 for a certain period of time, and notifies the luminance control unit 5 to that effect when there is no input instruction after the certain period of time. The background display control unit 10 controls to display still image data or moving image data other than moving images controlled by the moving image control unit 6.
　輝度制御部５は、本実施の形態の画像処理装置１が適用された携帯電話機に搭載されたディスプレイ１１の輝度を制御する。輝度制御部５は、ディスプレイ１１が例えば液晶ディスプレイの場合はバックライトの明るさを調整し、有機ＥＬディスプレイの場合は有機ＥＬディスプレイ自体の明るさを調整する。なお、ディスプレイ１１は、液晶ディスプレイや有機ＥＬディスプレイに限定されず、他のディスプレイであっても良いことは勿論である。本実施の形態では、ディスプレイ１１のバックライトの輝度を“全灯”と“微灯”の２段階とする。輝度制御部５は、時間監視部３からユーザ操作による入力指示が無い旨の通知を受けると、ディスプレイ１１のバックライトの輝度を“全灯”から“微灯”に切り換え、“微灯”の状態で入力指示がある旨の通知を受けると“全灯”に切り換える。 The brightness control unit 5 controls the brightness of the display 11 mounted on the mobile phone to which the image processing apparatus 1 of the present embodiment is applied. The brightness control unit 5 adjusts the brightness of the backlight when the display 11 is, for example, a liquid crystal display, and adjusts the brightness of the organic EL display itself when the display 11 is an organic EL display. Of course, the display 11 is not limited to a liquid crystal display or an organic EL display, and may be another display. In the present embodiment, the brightness of the backlight of the display 11 is set to two levels of “full light” and “low light”. When the brightness control unit 5 receives a notification from the time monitoring unit 3 that there is no input instruction by the user operation, the brightness control unit 5 switches the brightness of the backlight of the display 11 from "all lights" to "lights". Switch to "all lights" when notified that there is an input instruction in the status.
　動画制御部６は、デコーダ７におけるデコード処理を輝度制御部５による輝度設定に応じて変更する制御を行う。デコード処理として、動画像データのフレームレートを調整する。例えばディスプレイ１１の輝度が“全灯”に切り換わった場合は、図２に示すように単位時間当たりのフレーム描画枚数を６ｆｐｓに調整し、“微灯”に切り換わった場合は、図３に示すように単位時間当たりのフレーム描画枚数を４ｆｐｓに調整する。各フレームの描画時にはデコーダ７と表示制御部９が動作し、その単位あたりの積算動作時間はフレーム描画枚数が少なくなるに従って短くなる。デコーダ７と表示制御部９の動作時間が短くなることで電力消費が低減する。微灯の状態ではディスプレイ１１の画面が若干見難くなり、この見え難い画面では低フレームレートであっても通常のフレームレートでの描画と同等の視聴感覚を与えることが可能である。 The moving image control unit 6 performs control to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5. As a decoding process, the frame rate of moving image data is adjusted. For example, when the luminance of the display 11 is switched to "full light", the number of drawn frames per unit time is adjusted to 6 fps as shown in FIG. 2, and when switched to "light", as shown in FIG. As shown, the number of drawn frames per unit time is adjusted to 4 fps. At the time of drawing each frame, the decoder 7 and the display control unit 9 operate, and the integration operation time per unit becomes shorter as the number of drawn frames becomes smaller. Power consumption is reduced by shortening the operation time of the decoder 7 and the display control unit 9. In the state of slight lighting, the screen of the display 11 becomes somewhat difficult to see, and even with a low frame rate, it is possible to give the same viewing feeling as drawing at a normal frame rate.
　動画制御部６とデコーダ７は動画像処理手段８を構成し、動画像処理手段８は、動画像データのデコード処理の変更として動画像データのフレームレートを調整する以外に、（１）動画像データがスケーラブル圧縮コンテンツデータの場合に、デコードの段階を調整する方法や、（２）動画像データをデコードする色成分を調整する方法が挙げられる。スケーラブル圧縮とは、段階的にデコードが可能且つ、デコードを段階的に行うことで画質を高めることが可能な圧縮方式である。動画像データをデコードする色成分を調整する場合、例えば輝度成分のみに調整するか、輝度と青色差成分又は、輝度と赤色差成分のみに調整する。 The moving image control unit 6 and the decoder 7 constitute moving image processing means 8, and the moving image processing means 8 adjusts the frame rate of moving image data as a change of decoding processing of moving image data (1) moving image When the data is scalable compressed content data, a method of adjusting the stage of decoding, and (2) a method of adjusting color components for decoding moving image data may be mentioned. Scalable compression is a compression method that can be decoded stepwise and can improve image quality by performing decoding stepwise. When adjusting color components for decoding moving image data, for example, adjustment is made only to the luminance component, or adjustment is made to only the luminance and the blue difference component or only the luminance and the red difference component.
　また、動画制御部６とデコーダ７により構成される動画像処理手段８は、ディスプレイ１１が動画像データと、該動画像データとは異なる画像データ（背景表示制御部１０による背景の静止画像データもしくは動画像データ）とを同時に表示するときは、動画像データ及び背景画像データの両方のデコード処理あるいは動画像データのみのデコード処理を行う。なお、デコーダ７は、動画制御部６と背景表示制御部１０の両方に対して同じデコーダを使用しても良いし、別々なデコーダを使用しても良い。 Further, the moving image processing means 8 constituted by the moving image control unit 6 and the decoder 7 is such that the display 11 is moving image data and image data different from the moving image data (still image data of the background by the background display control unit 10 or When simultaneously displaying moving image data), decoding processing of both moving image data and background image data or decoding processing of only moving image data is performed. The decoder 7 may use the same decoder for both the moving image control unit 6 and the background display control unit 10, or may use separate decoders.
　表示制御部９は、前記デコーダによりデコードされた動画像データをディスプレイ１１に表示する制御を行う。このとき、表示制御部９は、輝度制御部５で調整された輝度に基づき、前記デコーダによりデコードされた動画像データの表示制御を、調整された前記フレームレートで、動画像データの表示制御を行う。また、表示制御部９は動画制御部６と背景表示制御部１０からの表示制御を独立して行っても良い。例として、動画制御部６は画面の一部分へキャラクタのアニメーションについてのデコードと表示制御を行い、背景表示制御部１０は、画面全体へ待ち受け画面やメニュー画面、状態表示アイコン等についてのデコードと表示制御を行う。表示制御部９はキャラクタのアニメーションと待ち受け画面やメニュー画面、状態表示アイコン等を、ディスプレイ１１に表示する制御を行う。 The display control unit 9 controls the display 11 to display moving image data decoded by the decoder. At this time, the display control unit 9 controls the display control of the moving image data decoded by the decoder based on the luminance adjusted by the luminance control unit 5 and the display control of the moving image data at the adjusted frame rate. Do. Further, the display control unit 9 may perform display control from the moving image control unit 6 and the background display control unit 10 independently. As an example, the moving image control unit 6 decodes and displays the animation of the character on a part of the screen, and the background display control unit 10 decodes and displays the standby screen, menu screen, status display icon, etc. on the entire screen. I do. The display control unit 9 controls the display 11 to display an animation of a character, a standby screen, a menu screen, a status display icon, and the like.
　次に、本実施の形態の画像処理装置１の動作を説明する。図４は、動画像データのデコード処理の変更として、フレームレートの調整を行う場合の動作を示すフローチャートである。図４において、まず動画描画処理かどうか判定し（ステップＳ１）、動画描画処理でない場合は本処理を終える。動画描画処理の場合は一定時間無操作検出を行う（ステップＳ２）。一定時間無操作を検出した場合は微灯制御を行い、ディスプレイ１１のバックライトの輝度を微灯レベルに設定してステップＳ６に移行する（ステップＳ３）。一方、一定時間無操作を検出しない場合はユーザ操作検出を行う（ステップＳ４）。ユーザ操作を検出した場合は全灯制御を行い、ディスプレイ１１の輝度を全灯レベルに設定してステップＳ６に移行する（ステップＳ５）。一定時間無操作を検出せず、かつユーザ操作を検出しない場合は、全灯制御も微灯制御もせずステップＳ６に移行する。 Next, the operation of the image processing apparatus 1 of the present embodiment will be described. FIG. 4 is a flowchart showing an operation in the case of adjusting a frame rate as a change in the decoding process of moving image data. In FIG. 4, first, it is determined whether or not moving image drawing processing (step S1), and if it is not moving image drawing processing, this processing ends. In the case of moving image drawing processing, no-operation detection is performed for a fixed time (step S2). When no operation is detected for a predetermined time, the slight light control is performed, the brightness of the backlight of the display 11 is set to the slight light level, and the process proceeds to step S6 (step S3). On the other hand, when no operation for a fixed time is detected, user operation detection is performed (step S4). If the user's operation is detected, full-light control is performed, the brightness of the display 11 is set to the full-light level, and the process proceeds to step S6 (step S5). If no operation for a predetermined time is detected and no user operation is detected, the process proceeds to step S6 without performing full light control or small light control.
　ステップＳ６では、輝度制御状態が微灯か全灯かを判定する。この判定において、輝度制御状態が全灯であれば、例えば図２に示すように通常フレームレートでのデコード処理を行い（ステップＳ７）、その動画像をディスプレイ１１に表示する（ステップＳ８）。これに対して、輝度制御状態が微灯であれば、例えば図３に示すように低フレームレートでのデコード処理を行い（ステップＳ９）、その動画像をディスプレイ１１に表示する（ステップＳ８）。全灯又は微灯での表示処理を行った後、ステップＳ１に戻り、上記同様の処理を繰り返す。 In step S6, it is determined whether the brightness control state is a slight light or a full light. In this determination, if the luminance control state is full lighting, decoding processing at a normal frame rate is performed as shown in FIG. 2 (step S7), and the moving image is displayed on the display 11 (step S8). On the other hand, if the luminance control state is a slight light, for example, decoding processing at a low frame rate is performed as shown in FIG. 3 (step S9), and the moving image is displayed on the display 11 (step S8). After the display process with the full light or the slight light is performed, the process returns to step S1 and the same process as described above is repeated.
　以上のように本実施の形態の画像処理装置１によれば、輝度制御部５は、動画描画処理において一定時間無操作が検出された場合は、ディスプレイ１１の輝度を微灯レベルに設定する微灯制御し、一定時間無操作が検出されずユーザ操作が検出された場合は、ディスプレイ１１の輝度を全灯レベルに設定する全灯制御し、動画像処理手段８は、輝度制御部５での輝度制御状態が全灯であれば通常フレームレートでデコード処理を行い、輝度制御部５での輝度制御状態が微灯であれば低フレームレートでデコード処理を行い、表示制御部９は、動画像処理手段８でデコード処理された動画像データを表示する。このように、消費電力の抑制のための一定時間経過時のディスプレイ１１のバックライトの輝度制御に応じてデコード処理及び表示制御を可変的に変更するので、ユーザに違和感を与えることなく省電力化が図れる。 As described above, according to the image processing apparatus 1 of the present embodiment, the brightness control unit 5 sets the brightness of the display 11 to the slight light level when no operation is detected for a predetermined time in the moving image drawing process. The light control is performed, and when no operation is detected for a predetermined period of time and the user operation is detected, the full light control is performed to set the brightness of the display 11 to the full light level. If the luminance control state is all lights, decoding processing is performed at the normal frame rate, if the luminance control state in the luminance control unit 5 is slight lighting, decoding processing is performed at the low frame rate, and the display control unit 9 The moving image data decoded by the processing means 8 is displayed. As described above, since the decoding process and the display control are variably changed according to the brightness control of the backlight of the display 11 when a predetermined time has elapsed for suppression of power consumption, power saving can be achieved without giving a sense of discomfort to the user. Can be
　なお、上記実施の形態では、動画像処理手段８による省電力化として、輝度調整に基づく動画像データのフレームレートを調整する等を行ったが、次の方法も採用可能である。すなわち、第１の解像度を有する動画像データと、第１の解像度より低い第２の解像度を有する動画像データとを記憶するメモリ（記憶手段、図示略）を設け、動画像処理手段８が、輝度制御部５で調整された輝度に基づき、第１の解像度を有する動画像データと第２の解像度を有する動画像データとを差し替える。例えば、ディスプレイ１１を微灯制御する場合、第１の解像度を有する動画像データを第２の解像度を有する動画像データに差し替える。 In the above embodiment, as the power saving by the moving image processing means 8, the frame rate of moving image data is adjusted based on the brightness adjustment, but the following method can also be adopted. That is, a memory (storage means, not shown) for storing moving image data having a first resolution and moving image data having a second resolution lower than the first resolution is provided, and the moving image processing means 8 Based on the luminance adjusted by the luminance control unit 5, the moving image data having the first resolution and the moving image data having the second resolution are replaced. For example, when the light control of the display 11 is performed, moving image data having a first resolution is replaced with moving image data having a second resolution.
　なお、上記実施の形態では、輝度調整を“全灯”と“微灯”の２段階としたが、３段階以上にしてもよい。輝度調整を３段階以上にする場合、輝度制御部５は、輝度の異なる複数の段階を有し、動画像処理手段８は、輝度制御部５で調整された輝度に対応するフレームレートで動画像データを処理する。 In the above embodiment, the luminance adjustment is performed in two stages of "full light" and "minute light", but may be performed in three or more stages. When the luminance adjustment is performed in three or more stages, the luminance control unit 5 has a plurality of stages with different luminances, and the moving image processing means 8 performs moving images at a frame rate corresponding to the luminance adjusted by the luminance control unit 5 Process data
　（実施の形態２）
　図５は、本発明の実施の形態２に係る画像処理装置の概略構成を示すブロック図である。本実施の形態の画像処理装置１Ａは、実施の形態１の画像処理装置１の構成に加えて、電池残量検出部４を設けている。電池残量検出部４は、本実施の形態の画像処理装置１Ａが適用された携帯電話機に搭載された電池（図示略）の電圧を検出し、検出値を出力するものである。なお、実施の形態１の画像処理装置１と同一の部分には同一の符号を付し説明を省略する。 Second Embodiment
FIG. 5 is a block diagram showing a schematic configuration of an image processing apparatus according to Embodiment 2 of the present invention. In addition to the configuration of the image processing apparatus 1 of the first embodiment, the image processing apparatus 1A of the present embodiment is provided with a battery remaining amount detection unit 4. The battery remaining amount detection unit 4 detects a voltage of a battery (not shown) mounted on a mobile phone to which the image processing apparatus 1A of the present embodiment is applied, and outputs a detection value. The same parts as those of the image processing apparatus 1 of the first embodiment are designated by the same reference numerals, and the description thereof is omitted.
　本実施の形態において、電池残量検出部４は、電池電圧の検出値に基づき、電池残量または、推定使用可能時間が所定値以下になった場合に、輝度制御部５に通知する。輝度制御部５は、ディスプレイ１１が例えば液晶ディスプレイの場合はバックライトの明るさを調整し、有機ＥＬディスプレイの場合は有機ＥＬディスプレイ自体の明るさを調整する。輝度制御部５は、電池残量検出部４から電池残量所定値以下である旨の通知を受けると、ディスプレイ１１のバックライトの輝度を“全灯”から“微灯”に切り換え、“微灯”の状態で充電開始または、充電により電池残量が所定値以上または、推定使用可能時間が所定値以上に回復した旨の通知を受けると“全灯”に切り換える。 In the present embodiment, based on the detected value of the battery voltage, the battery remaining amount detection unit 4 notifies the luminance control unit 5 when the battery remaining amount or the estimated usable time becomes equal to or less than a predetermined value. The brightness control unit 5 adjusts the brightness of the backlight when the display 11 is, for example, a liquid crystal display, and adjusts the brightness of the organic EL display itself when the display 11 is an organic EL display. The brightness control unit 5 switches the brightness of the backlight of the display 11 from "full light" to "slight light" when receiving notification from the battery remaining amount detection unit 4 that the battery remaining amount is equal to or less than the predetermined value. In the state of "light", when the notification that the battery remaining amount exceeds the predetermined value or the estimated usable time has been recovered to the predetermined value or more by charging is switched to "all lights".
　（実施の形態３）
　本発明の実施の形態３に係る画像処理装置の構成は実施の形態１の画像処理装置１の構成と同様であり、説明を省略する。本実施の形態において、デコーダ７におけるデコード処理を輝度制御部５による輝度設定に応じて変更する制御を行う。デコード処理として、デコードする色成分を一部色成分のみに調整する。例えばディスプレイ１１の輝度が“全灯”に切り換わった場合は、輝度と青色差成分と赤色差成分の全成分を対象にデコードするように調整し、“微灯”に切り換わった場合は、輝度成分のみに調整又は、輝度と青色差成分又は、輝度と赤色差成分のみを対象にデコードするように調整する。各フレームのデコード処理にはデコーダ７が動作し、１フレームあたりに要するデコード処理時間が短くなることで電力消費が低減する。微灯の状態ではディスプレイ１１の画面が若干見難くなり、この見え難い画面では一部の輝度または色成分によるデコード処理であっても通常のデコード結果の描画と同等の視聴感覚を与えることが可能である。表示制御部は、前記デコーダでデコードされた動画像データをディスプレイ１１に表示する制御を行う。 Third Embodiment
The configuration of the image processing apparatus according to the third embodiment of the present invention is the same as the configuration of the image processing apparatus 1 according to the first embodiment, and the description will be omitted. In the present embodiment, control is performed to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5. As decoding processing, color components to be decoded are adjusted to only partial color components. For example, when the luminance of the display 11 is switched to "full light", adjustment is made so that all components of the luminance, blue difference component and red difference component are decoded, and when switched to "light" Adjustment is performed only to the luminance component, or adjustment is performed so as to decode only the luminance and the blue difference component, or the luminance and the red difference component. The decoder 7 operates to decode each frame, and the power consumption is reduced by shortening the decoding processing time required per frame. In the state of slight lighting, the screen of the display 11 becomes somewhat difficult to see, and even on a screen that is difficult to see, even with the decoding processing by a part of luminance or color components, it is possible to give the same viewing feeling as drawing normal decoding results. It is. The display control unit performs control to display moving image data decoded by the decoder on the display 11.
　（実施の形態４）
　本発明の実施の形態４に係る画像処理装置の構成は実施の形態１の画像処理装置１の構成と同様であり、説明を省略する。本実施の形態において、デコーダ７におけるデコード処理を輝度制御部５による輝度設定に応じて変更する制御を行う。動画像データがスケーラブル圧縮コンテンツデータの場合に、デコード処理として、段階的に行われているデコード処理を途中段階でデコード完了として扱うようにデコード段階を調整する。例えばディスプレイ１１の輝度が“全灯”に切り換わった場合は、６回繰り返しデコードを行うことで完成するデコード処理を、６回繰り返しデコードを行うように調整し、“微灯”に切り換わった場合は、６回繰り返しデコードを行うことで完成するデコード処理を、４回繰り返しデコードを行うように調整する。各フレームのデコード処理にはデコーダ７が動作し、１フレームあたりに要するデコード処理時間が短くなることで電力消費が低減する。微灯の状態ではディスプレイ１１の画面が若干見難くなり、この見え難い画面ではデコード途中段階であっても通常のデコード結果の描画と同等の視聴感覚を与えることが可能である。表示制御部は、前記デコーダでデコードされた動画像データをディスプレイ１１に表示する制御を行う。 Embodiment 4
The configuration of the image processing apparatus according to the fourth embodiment of the present invention is the same as the configuration of the image processing apparatus 1 according to the first embodiment, and the description will be omitted. In the present embodiment, control is performed to change the decoding process in the decoder 7 according to the brightness setting by the brightness control unit 5. When the moving image data is scalable compressed content data, the decoding stage is adjusted so that the decoding process being performed in stages is treated as the decoding completion in the middle stage as the decoding process. For example, when the luminance of the display 11 is switched to "full light", the decoding process completed by repeating decoding six times is adjusted to perform decoding six times repeatedly, and switched to "slight light" In this case, the decoding process to be completed by repeating the decoding six times is adjusted to perform the decoding four times. The decoder 7 operates to decode each frame, and the power consumption is reduced by shortening the decoding processing time required per frame. In the state of the dim light, the screen of the display 11 becomes slightly difficult to see, and even on the way of decoding, it is possible to give the same viewing feeling as drawing of a normal decoding result. The display control unit performs control to display moving image data decoded by the decoder on the display 11.
　（実施の形態５）
　本発明の実施の形態５に係る画像処理装置の構成は実施の形態１の画像処理装置１の構成と同様であり、説明を省略する。本実施の形態において、デコーダ７でデコード処理を行い、表示制御部９における表示制御処理を、輝度制御部５による輝度設定に応じて表示転送レートを変更する。例えば転送レートの変更処理として（１）画像データをフレーム数分デコードされていても、ディスプレイ１１へは該フレーム数より少ないフレーム数のデータのみに間引いて転送する方法、（２）画像データのデコード結果がYUV444の場合にディスプレイ１１へ転送の際にYUV420で転送し転送データ量を減らす（３）ディスプレイ１１への動画像データの転送に対してその他の手段により転送レートを変化させる方法であってもよい。これにより、本来必要とする処理時間よりも短くなることで電力消費が低減する。微灯の状態ではディスプレイ１１の画面が若干見難くなり、この見え難い画面では表示に要しているデータ量が抑えられている条件下であっても通常の表示制御結果の描画と同等の視聴感覚を与えることが可能である。 Fifth Embodiment
The configuration of the image processing apparatus according to the fifth embodiment of the present invention is the same as the configuration of the image processing apparatus 1 according to the first embodiment, and the description will be omitted. In the present embodiment, the decoder 7 performs a decoding process, and the display control process in the display control unit 9 changes the display transfer rate according to the brightness setting by the brightness control unit 5. For example, (1) a method of decimating and transferring only data of a smaller number of frames to the display 11 even if the image data is decoded by the number of frames as transfer rate changing processing, (2) decoding of the image data When the result is YUV 444, it is transferred by YUV 420 at the time of transfer to the display 11 to reduce the amount of transferred data (3) A method of changing the transfer rate by other means for the transfer of moving image data to the display 11 It is also good. As a result, the power consumption is reduced by shortening the processing time originally required. In the state of a slight light, the screen of the display 11 becomes slightly difficult to see, and on this difficult-to-see screen, viewing equivalent to drawing of a normal display control result even under conditions where the amount of data required for display is suppressed It is possible to give a sense.
　本発明は上記実施の形態に限定されず、適宜変更して実施することができる。上記実施の形態における動画像データのデコード処理の変更方法、動画像データの表示制御の変更方法などは一例であり、本発明の効果を発揮する範囲内において組み合わせや、種々変更して実施することが可能である。その他、本発明の目的の範囲を逸脱しない限りにおいて適宜変更して実施することが可能である。 The present invention is not limited to the above embodiment, and can be implemented with appropriate modifications. The method of changing the decoding process of moving image data, the method of changing display control of moving image data, and the like in the above-described embodiment are an example, and combinations and various changes may be made within the scope of the effects of the present invention. Is possible. In addition, without departing from the scope of the object of the present invention, it is possible to appropriately change and implement.
　本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明らかである。 Although the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
　本出願は、２００８年９月３０日出願の日本特許出願（特願２００８－２５４２５９）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on Japanese Patent Application (Japanese Patent Application No. 2008-254259) filed on September 30, 2008, the contents of which are incorporated herein by reference.
　本発明は、バックライトの輝度に応じてフレーム周波数を変えることで得られる省電力化をさらに推し進めることができるといった効果を有し、携帯電話等の輝度制御可能なディスプレイを備えた電子機器への適用が可能である。 The present invention has the effect that power saving obtained by changing the frame frequency according to the brightness of the backlight can be further promoted, and it is possible to provide an electronic device equipped with a brightness-controllable display such as a mobile phone. It is applicable.
　１、１Ａ　画像処理装置
　２　ユーザ入力部
　３　時間監視部
　４　電池残量検出部
　５　輝度制御部
　６　動作制御部
　７　デコーダ
　８　動画像処理手段
　９　表示制御部
　１０　背景表示制御部
　１１　ディスプレイ 1, 1A Image processing apparatus 2 User input unit 3 Time monitoring unit 4 Battery remaining amount detection unit 5 Brightness control unit 6 Operation control unit 7 Decoder 8 Moving image processing means 9 Display control unit 10 Background display control unit 11 Display

Claims (15)

  1. 　デコード処理された動画像データを表示する表示手段と、
    　前記表示手段の輝度を調整する輝度調整手段と、
    　前記輝度調整手段で調整された輝度に基づき、前記動画像データのデコード処理を変更する動画像処理手段と、
    　を備えた画像処理装置。     Display means for displaying the decoded moving image data;
    Brightness adjustment means for adjusting the brightness of the display means;
    Moving image processing means for changing the decoding process of the moving image data based on the brightness adjusted by the brightness adjusting means;
    Image processing device equipped with
  2. 　前記動画像処理手段は、前記動画像データのフレームレートを調整する請求項１に記載の画像処理装置。 The image processing apparatus according to claim 1, wherein the moving image processing unit adjusts a frame rate of the moving image data.
  3. 　前記動画像処理手段は、前記動画像データが段階的に展開できる圧縮が行われているコンテンツデータの場合、デコード完了の段階を調整する請求項１に記載の画像処理装置。 The image processing apparatus according to claim 1, wherein the moving image processing means adjusts a stage of decoding completion in the case of content data which is compressed so that the moving image data can be expanded stepwise.
  4. 　前記動画像処理手段は、デコード処理の対象とする、前記動画像データの色空間を構成する成分の数を調整する請求項１に記載の画像処理装置。 The image processing apparatus according to claim 1, wherein the moving image processing means adjusts the number of components constituting a color space of the moving image data to be decoded.
  5. 　第１の解像度を有する動画像データと、前記第１の解像度より低い第２の解像度を有する動画像データとを記憶する記憶手段をさらに備え、前記動画像処理手段は、前記輝度調整手段で調整された輝度に基づき、前記第１の解像度を有する動画像データと前記第２の解像度を有する動画像データとを差し替える請求項１に記載の画像処理装置。 The image processing apparatus further comprises storage means for storing moving image data having a first resolution and moving image data having a second resolution lower than the first resolution, wherein the moving image processing means is adjusted by the brightness adjusting means. The image processing apparatus according to claim 1, wherein the moving image data having the first resolution and the moving image data having the second resolution are replaced based on the determined luminance.
  6. 　前記動画像処理手段は、前記表示手段が前記動画像データと、前記動画像データとは異なる画像データを表示するとき、前記動画像データのデコード処理を調整する請求項１乃至請求項５のいずれかに記載の画像処理装置。 The moving image processing means adjusts the decoding process of the moving image data when the display means displays the moving image data and image data different from the moving image data. The image processing apparatus described in.
  7. 　前記表示手段に対する前記デコード処理された動画像データの表示を制御する表示制御手段をさらに備え、前記表示制御手段は、前記輝度調整手段で調整された輝度に基づき、前記動画像データの表示制御を変更する請求項１に記載の画像処理装置。 The display control means further controls display of the decoded moving image data on the display means, and the display control means controls display of the moving image data based on the brightness adjusted by the brightness adjusting means. The image processing apparatus according to claim 1, wherein the image processing apparatus changes.
  8. 　前記表示制御手段は、前記デコード処理された動画像データを減色処理し、前記表示手段への転送レートを変化させる請求項７に記載の画像処理装置。 The image processing apparatus according to claim 7, wherein the display control unit performs color reduction processing on the decoded moving image data to change a transfer rate to the display unit.
  9. 　前記表示制御手段は、前記画像データをフレーム数分デコードし、前記表示手段へは該フレーム数より少ないフレーム数のデータのみ転送する請求項７に記載の画像処理装置。 8. The image processing apparatus according to claim 7, wherein the display control means decodes the image data by the number of frames, and transfers only data of a smaller number of frames than the number of frames to the display means.
  10. 　前記表示制御手段は、前記デコード処理された動画像データの色成分数を減らし、前記表示手段へ転送する請求項７に記載の画像処理装置。 The image processing apparatus according to claim 7, wherein the display control unit reduces the number of color components of the decoded moving image data, and transfers the reduced number of color components to the display unit.
  11. 　入力指示を受付ける入力手段と、前記入力手段への入力指示が所定時間あるか否かを監視する時間監視手段と、をさらに備え、前記輝度調整手段は、前記時間監視手段の監視結果に応じて、前記表示手段の輝度を調整する請求項１に記載の画像処理装置。 The apparatus further comprises an input unit for receiving an input instruction, and a time monitoring unit for monitoring whether or not there is a predetermined time for an input instruction to the input unit, and the brightness adjustment unit responds to the monitoring result of the time monitoring unit. The image processing apparatus according to claim 1, wherein the luminance of the display means is adjusted.
  12. 　各手段に電力を供給する電池の残量を検出する電池残量検出手段をさらに備え、前記輝度調整手段は、前記電池残量検出手段の検出結果に応じて、前記表示手段の輝度を調整する請求項１に記載の画像処理装置。 The apparatus further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery supplying power to each unit, and the brightness adjusting unit adjusts the brightness of the display unit according to the detection result of the battery remaining amount detecting unit. The image processing apparatus according to claim 1.
  13. 　各手段に電力を供給する電池の残量を検出する電池残量検出手段をさらに備え、前記電池残量検出手段の検出結果に応じて、前記動画像データのデコード処理を変更する請求項１に記載の画像処理装置。 According to another aspect of the present invention, the apparatus further comprises a battery remaining amount detecting unit for detecting the remaining amount of the battery supplying power to each unit, and changing the decoding process of the moving image data according to the detection result of the battery remaining amount detecting unit. Image processing apparatus as described.
  14. 　前記輝度調整手段は、輝度の異なる複数の段階を有し、前記動画像処理手段は、前記輝度調整手段で調整された輝度に対応するフレームレートで前記動画像データを処理する請求項１に記載の画像処理装置。 The brightness adjustment means comprises a plurality of stages of different brightness, and the moving image processing means processes the moving image data at a frame rate corresponding to the brightness adjusted by the brightness adjustment means. Image processing device.
  15. 　デコード処理された動画像データを表示する表示ステップと、
    　前記表示ステップでの輝度を調整する輝度調整ステップと、
    　前記輝度調整ステップで調整された輝度に基づき、前記動画像データのデコード処理を変更する動画像処理ステップと、
    　を備えた画像処理方法。     A display step of displaying the decoded moving image data;
    A luminance adjustment step of adjusting the luminance in the display step;
    A moving image processing step of changing the decoding processing of the moving image data based on the brightness adjusted in the brightness adjusting step;
    Image processing method provided with
PCT/JP2009/003512 2008-09-30 2009-07-24 Image processing device WO2010038341A1 (en)

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