WO2008122184A1 - Dispositif video et procede de reglage des caracteristiques d'une image video - Google Patents

Dispositif video et procede de reglage des caracteristiques d'une image video Download PDF

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Publication number
WO2008122184A1
WO2008122184A1 PCT/CN2007/071346 CN2007071346W WO2008122184A1 WO 2008122184 A1 WO2008122184 A1 WO 2008122184A1 CN 2007071346 W CN2007071346 W CN 2007071346W WO 2008122184 A1 WO2008122184 A1 WO 2008122184A1
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WO
WIPO (PCT)
Prior art keywords
information
video image
video
unit
image characteristic
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PCT/CN2007/071346
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English (en)
French (fr)
Inventor
Guiming Shu
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008122184A1 publication Critical patent/WO2008122184A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57Control of contrast or brightness
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/422Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42202Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4318Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Communication protocols
    • H04N21/64322IP

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a video device and a method for adjusting video image characteristics.
  • the current IPTV set-top box can provide a good visual experience for users to watch video programs in different light and brightness environments, and most of them provide an operation interface for manually adjusting the brightness, chromaticity and contrast of the output video image.
  • the light intensity of the video program has a large change, or the image characteristics of the video programs of different channels are greatly different, and the user can obtain different types of services (such as browsing the web, video on demand, text reading or editing) through the set top box.
  • the interface manually adjusts the brightness, contrast, etc. of the output video to improve the characteristics of the output video image, thereby giving the user a better visual experience.
  • the shortcomings of this user's manual adjustment of video characteristics are obvious: when the user's viewing environment has a large change in light, or the brightness, contrast, etc.
  • embodiments of the present invention provide a video device and a method for adjusting video image characteristics to automate the adjustment of video image characteristics, overcome the defects of "glare glare" at a low cost, and improve the user experience.
  • the embodiment of the invention provides a video device, including:
  • a network communication unit configured to receive service content information from a network side
  • a video image characteristic processing unit configured to acquire element information that affects video image characteristics, and send the element information to a video image characteristic adjustment unit;
  • a video image characteristic adjustment unit configured to determine adjustment information according to the element information provided by the video image characteristic processing unit, and adjust a video characteristic of the service content information according to the adjustment information.
  • the embodiment of the invention further provides a method for adjusting video image characteristics, including:
  • the method and device of the embodiment of the present invention by acquiring element information that affects video image characteristics, include: ambient light, service type, and the like, determining adjustment information according to the element information, and performing video image data corresponding to the service content information. Adjust, or, adjust the display circuit.
  • the utility model realizes the "screen change, the automation and the intelligence, the human visual fatigue is alleviated, the manual trouble is reduced, and the user experience is enhanced; the technical solution of the embodiment of the invention can be applied to various types of displays, and the application range is wide; It is realized by software, does not depend on a dedicated chip, and is scalable and maintainable, reducing costs.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of an apparatus according to the present invention.
  • Embodiment 2 is a schematic structural diagram of Embodiment 2 of the device according to the present invention.
  • FIG. 3 is a schematic structural diagram of an ambient light detecting unit according to Embodiment 2 of the device of the present invention.
  • Embodiment 3 is a schematic structural diagram of Embodiment 3 of the device according to the present invention.
  • Figure 5-1 is a schematic structural diagram of Embodiment 4 of the device of the present invention.
  • FIG. 5-2 is a schematic structural diagram of a video image characteristic statistical unit according to Embodiment 4 of the present invention
  • FIG. 6 is a flowchart of Embodiment 1 of the method according to the present invention
  • Embodiment 8 is a flowchart of Embodiment 3 of a method according to the present invention.
  • FIG. 9 is a flowchart of Embodiment 4 of the method of the present invention.
  • Embodiments of the present invention provide a video device and a method for adjusting video image characteristics.
  • the present invention will be further described in detail below.
  • a video device 100 includes: a control unit 102, a network communication unit 104, an audio and video decoding unit 106, a video image characteristic processing unit 108, and a video image characteristic adjustment unit 110.
  • the network communication unit 104 is configured to communicate with the network device, and connect the video device to the network to receive service content information from the network side.
  • the control unit 102 is configured to use between the functional units that constitute the video device.
  • Cooperating for control and coordination; audio and video decoding unit 106 is configured to decode received service content information to obtain audio and video streams; video image characteristics
  • the processing unit 108 is configured to acquire element information that affects video image characteristics, process the element information, and feed back the processing result to the video image characteristic adjustment unit 110.
  • the video image characteristic adjustment unit 110 is configured to use the video image characteristic processing unit.
  • the processing result provided by 108 determines the adjustment information, adjusts the video image data corresponding to the service content information, or adjusts the display circuit.
  • the video image characteristic adjustment unit 110 includes means for adjusting video image data corresponding to the service content information according to the adjustment information; and/or a module for adjusting the display circuit according to the adjustment information.
  • the video device 100 of this embodiment further includes a video post-processing unit 114, an audio post-processing unit 112, a media play interface unit 116, a peripheral device, and an extension interface unit 118.
  • the video post-processing unit 114 is configured to perform corresponding transform processing on the video data output by the video image feature adjustment unit 110 according to the mode of the media play interface provided by the video device; the audio post-processing unit 112 is configured to use the audio/video codec unit 106.
  • the output audio data is correspondingly transformed according to the mode of the media play interface provided by the video device; the media play interface unit 116 is an interface between the video device and the play unit/device, and the unit is used for the audio and video post-processing unit.
  • the output audio and video stream is adjusted and output to a playback device, such as a television or display terminal.
  • the video device 200 provided in this embodiment is different from the device embodiment 1 in that the video image feature processing unit 108 is specifically configured to: the ambient light detecting unit 202 is configured to measure the light of the environment in which the user is located, and record Storing measurement results, preset ambient brightness and corresponding video image characteristic reference information; processing and calculating the measurement result, and feeding back the processing result to the video image characteristic adjustment unit 110; the processing result may be directly output to the video image characteristic adjustment unit 110, may also be output to the control unit 102, and then further output to the video image characteristic adjustment unit 110 by the control unit 102.
  • the ambient light detecting unit 202 includes:
  • One or more photosensors 302 for performing real-time measurement of ambient light are provided.
  • the storage unit 304 is configured to store preset ambient brightness and corresponding video image characteristic reference information, and information such as an ambient brightness value measured when the previous video image characteristic is adjusted;
  • the processing unit 306 is configured to perform processing according to the measurement result and the information in the storage unit 304, and feed back the processing result to the video image characteristic adjustment unit 110.
  • the ambient light detecting unit 202 performs real-time measurement of the light intensity of the environment by the photosensitive device (when there are a plurality of photosensitive devices, comprehensive measurement of the measurement results of each photosensitive device is required).
  • the storage unit 304 stores a reference value of the preset ambient brightness and the corresponding video image characteristic information, and the reference value may be updated according to the previous adjustment information, and the characteristic information of the current video image can be obtained from the video image characteristic adjustment unit 110. .
  • the processing unit 306 records the ambient brightness value of the time to the storage unit 304 after outputting the result for the video image characteristic adjustment unit 110, and finds the real-time detected ambient brightness value and the previously recorded ambient brightness value in the subsequent time period. When the difference is greater than the preset threshold, the video image characteristic adjustment unit 110 outputs a new result again, and the ambient luminance value at that moment is recorded to the storage unit 304.
  • the video image characteristic adjustment unit 110 is configured to determine the adjustment information according to the received light measurement and processing result output by the ambient light detecting unit 202, and adjust the video image data output by the audio/video codec unit 106. Since this processing is mainly directed to the user's visual needs due to changes in ambient light, the method of "linear grayscale transformation" in image processing technology can be used. According to this method, the image output by the audio/video codec unit is assumed.
  • the gray level at the pixel point (x, y) is f ( X, y ), and the gray level at the corresponding pixel point after processing is g ( x, y ), if the gray of f ( x, y )
  • the degree range is [a, b]
  • the dynamic range of the gray image of the transformed image g ( x , y ) is expected to be [c, d], which can be achieved by the following transformation:
  • a, b can be obtained by counting the current video image data output by the audio and video codec unit 106, c, d is a reference value of the preset ambient brightness and the corresponding video image characteristic information, and the ambient light detecting unit 202
  • the output video image characteristic adjustment information is comprehensively determined according to a predetermined adjustment strategy.
  • the method for adjusting the characteristics of the video image in the above scheme is realized by transforming the image decoded data by a software function, and does not require a dedicated chip.
  • the video device 400 provided in this embodiment is different from the device embodiment 1 in that the video image feature processing unit 108 is specifically configured to: store a type of service content information and Corresponding information of the video image characteristics; obtaining type information of the service content information received by the current video device, and determining a video corresponding thereto according to the type information Information of the image characteristics; the information is fed back to the video image characteristic adjustment unit 110.
  • the video image characteristic adjustment unit 110 receives the information from the service type sensing unit 402, determines the video image characteristic adjustment information, adjusts the video image data corresponding to the service content information according to the adjustment information, or adjusts the display circuit.
  • the service type sensing unit 402 includes: a storage unit, a service type acquiring unit, and a video image characteristic determining unit.
  • the storage unit is configured to store the type of the preset service content information and the adjustment information of the corresponding video image characteristics;
  • the service type obtaining unit is configured to acquire the type information of the service content information received by the current video device;
  • the determining unit is configured to determine video image characteristic information corresponding to the type information according to the storage information in the second storage unit, and transmit the determined video image characteristic information to the video image characteristic adjusting unit.
  • users have different visual requirements for different business content information, such as web pages, movies, games, electronic documents, etc., for a movie, color brightness is relatively clear, and for electronic documents, brightness is relatively soft and dim.
  • Users can preset their corresponding video image characteristics for different types of business content information, such as movies, set brightness 80, contrast 75; for electronic document reading, set brightness 70, contrast 55.
  • the unit senses the change of the service content information in real time, and feeds back the information to the video image characteristic adjustment unit 110 according to the change.
  • the specific implementation of the video image characteristic adjustment unit can be implemented by software or hardware.
  • the video image characteristic adjustment unit may be a software module, and the video image data is decoded.
  • the specific technical details are described in detail in the second embodiment of the device, and details are not described herein.
  • the video image characteristic adjustment unit may also be a hardware circuit that adjusts corresponding signal components in the analog video stream synthesized after the D/A conversion during image post-processing.
  • the video device 500 provided in this embodiment is different from the device embodiment 1 in that the video image feature processing unit 108 is specifically: a video image feature statistics unit 502, which may specifically include :
  • the storage unit 504 is configured to store preset reference video image characteristic information.
  • the statistical calculation unit 506 is configured to perform statistics on the video image data output by the audio/video codec unit 106, compare the statistical result with the reference video image characteristic information preset in the storage unit 504, and feed back the processing result to the video image.
  • Feature adjustment unit 110 The video image characteristic adjustment unit 110 determines adjustment information for the current video image characteristic according to the processing result, and adjusts the video image data corresponding to the service content information according to the adjustment information.
  • the video device provided by the device embodiment of the present invention may be a set top box, a display terminal integrated with a set top box function, a home media device, a television set, a computer display terminal, a video glasses, a mobile communication terminal (such as a mobile phone, etc.), and a mobile digital entertainment device (such as MP4 player).
  • each of the foregoing embodiments separately uses information such as ambient light and service type as reference information for adjusting video image data, and describes a method for adjusting video image characteristics.
  • the present invention is not limited to these methods, and may also be comprehensively considered.
  • This information is used to determine reference information for adjusting the video image data.
  • the video image characteristic processing unit may comprehensively consider the information to determine reference information for adjusting the video image data; or the video image characteristic processing unit may report the information to the video image characteristic adjustment unit, and then the video The image characteristic adjustment unit comprehensively considers such information to determine reference information for adjusting the video image data.
  • the embodiment provides a method for adjusting video image characteristics, which is applied to a video device, including:
  • the video device receives service content information from a network side.
  • the video device acquires element information that affects video image characteristics, processes the element information, and determines adjustment information.
  • the video device adjusts video image data corresponding to the service content information according to the adjustment information, or adjusts the display circuit.
  • the method of this embodiment is based on the extension of the method embodiment 1.
  • the step of "acquiring the element information that affects the characteristics of the video image” includes: measuring the light of the environment in which the user is located. Refer to Figure 7:
  • the video device receives service content information from a network side.
  • the video device decodes the service content information, and restores the data of the audio and video; and S706, the video device measures the light of the environment where the user is located;
  • the video device determines, according to the measurement result of the ambient light, a preset ring stored on the video device.
  • the ambient brightness and its corresponding image characteristic reference information, and the previously measured ambient brightness value are processed and calculated to obtain adjustment information;
  • the video device adjusts the video image data according to the adjustment information, or adjusts the display circuit.
  • the method of this embodiment is based on the extension of the method embodiment 1.
  • the step of "acquiring the element information that affects the video image characteristics" includes: acquiring type information of the service content information received by the current video device. Refer to Figure 8:
  • the video device receives service content information from a network side.
  • S804 The video device acquires type information of the service content information received by the current video device.
  • the video device searches, according to the type information of the service content information, the preset adjustment information of the video image characteristics corresponding to the preset stored on the video device;
  • the video device adjusts the video image data according to the adjustment information, or adjusts the display circuit.
  • the method of this embodiment is based on the extension of the method embodiment 1.
  • the step of "acquiring the element information that affects the characteristics of the video image” includes: performing statistics on the video image data to obtain a statistical result. Refer to Figure 9:
  • the video device receives service content information from a network side.
  • the video device decodes the service content information, and restores the data of the audio and video.
  • the video device performs statistics on the video image data, and obtains a statistical result
  • the video device determines, according to the statistical result, the preset reference video image characteristic information stored on the video device, the adjustment information of the video image characteristic, and outputs the adjustment information;
  • the video device adjusts the video image data according to the adjustment information.
  • the device and the method of the embodiment of the present invention acquire the element information that affects the characteristics of the video image by using the video device, including: ambient light, service type, and the like, and determining the adjustment information according to the element information. And adjusting the video image data corresponding to the service content information, or adjusting the display circuit.

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Description

一种视频设备和调节视频图像特性的方法
本申请要求于 2007 年 4 月 9 日提交中国专利局、 申请号为 200710073824.1 , 发明名称为 "一种视频设备和调节视频图像特性的方法"的中 国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域,特别涉及一种视频设备和调节视频图像特性的 方法。
背景技术
现有的电视机屏幕会让人产生"眩光"——当人们观察某一视觉对象时,如 果视场中有一耀眼的发光点, 就会影响观察效果, 而且会使人感到不舒适, 这 就是眩光现象。相关调查表明,很多眼疾患者的疾病是由于长期观看高亮度的 电视造成的, 从医学上解释是由于一些电视的亮度过高而存在眩光污染引起 的。 液晶电视比普通电视更容易造成眩光污染, 这是因为液晶本身不能发光, 只能依靠背光源提供亮度。 因此, 液晶电视的亮度非常高, 看久了自然就会使 人视觉疲劳, 产生"眩光刺眼", 进而容易导致视力下降。 随着更多的液晶电视 走进普通消费者家庭,由亮度过高而引起的眩光污染引起了消费者和广大彩电 厂商的关注。
针对眩光污染的问题, "屏变 "技术应运而生, 这一被称为"屏变"的技术能 够根据收视环境自动变换亮度和色彩,从而使观众在收看电视时不会因为亮度 过高而感到刺眼、 眩晕。 "屏变,,技术能够解决传统液晶电视的眩光污染问题, 在于它不但可以从电视内部图像自身亮度的变换进行调节,而且还可以根据观 众的收视环境亮度的变化而变化。 "屏变 "的效果是由光感屏变和场景屏变两个 部分共同作用的结果。 光感屏变是指利用电视外置的光学感应器,通过对外界 环境亮度强弱的监测来调节背光灯管亮度等级和功率。场景屏变是利用芯片的 补偿处理, 自动跟踪输入信号的强弱, 对背光灯的亮度进行精确管理控制。
通过将 "屏变 "技术应用于新型液晶电视,较好地解决了传统液晶电视机的 眩光污染问题。但是在实现本发明的过程中,发明人发现应用该技术解决眩光 问题尚有如下不足:
( 1 ) "屏变,,技术依赖于专用的芯片, 增加了电视设备的成本; ( 2 ) "屏变 "技术主要是通过对背光强度的调节来实现的, 该技术也就只 能应用于使用了背光器件的液晶电视;
( 3 ) 目前市场上或正在使用中的大量 CRT ( Cathode Ray Tube, 阴极射线 管)及液晶电视都不支持"屏变"功能。
目前的 IPTV机顶盒为了使用户在不同光亮度环境下观看视频节目都能够 有一个好的视觉感受, 大都为用户提供了一个手动调节输出视频图像亮度、 色 度、 对比度的操作接口, 当用户观赏环境的光线强度有较大改变, 或者不同频 道的视频节目的图像特性有较大差异,以及用户通过机顶盒获取不同类型的业 务(如浏览网页、 视频点播、 文本阅读或编辑)时, 用户可以通过该接口手动 调节输出视频的亮度、 对比度等, 以改善输出的视频图像特性, 从而给用户更 好的视觉感受。这种用户手动调节视频特性方法的缺陷是很明显的: 当用户观 看环境的光线有较大变化, 或者用户切换频道后节目的视频图像的亮度、对比 度等特性有很大差异, 以及用户利用机顶盒获取不同类型的业务时, 都需要由 用户来手动调节机顶盒输出的视频特性, 这显然给用户带来很多的麻烦。
发明内容
有鉴于此, 本发明实施例提供一种视频设备和调节视频图像特性的方法, 以实现视频图像特性调节的自动化, 以较低的成本克服"眩光刺目艮"的缺陷, 改 善用户体验。
本发明实施例通过如下的技术方案实现:
本发明实施例提供一种视频设备, 包括:
网络通信单元, 用于接收来自网络侧的业务内容信息;
视频图像特性处理单元, 用于获取对视频图像特性产生影响的要素信息, 并将所述要素信息发送给视频图像特性调节单元;
视频图像特性调节单元,用于根据所述视频图像特性处理单元提供的要素 信息,确定调节信息,并根据所述调节信息调节所述业务内容信息的视频特性。
本发明实施例还提供一种调节视频图像特性的方法, 包括:
接收来自网络侧的业务内容信息;
获取对视频图像特性产生影响的要素信息,并根据所述要素信息确定调节 信息; 根据所述调节信息调节所述业务内容信息的视频特性。
本发明实施例的方法及设备通过获取对视频图像特性产生影响的要素信 息, 包括: 环境光线、 业务类型等, 根据该要素信息确定调节信息, 并对所述 业务内容信息对应的视频图像数据进行调节, 或者, 对显示电路进行调节。 实 现了"屏变,,自动化和智能化, 緩解了人视觉疲劳, 减少了手动的麻烦, 增强了 用户体验; 本发明实施例的技术方案可以应用于多种类型的显示器, 适用范围 广; 可以通过软件实现, 不依赖于专用芯片,可扩展和可维护性强, 降低成本。 附图说明
图 1为本发明设备实施例一的结构示意图;
图 2为本发明设备实施例二的结构示意图;
图 3为本发明设备实施例二的环境光线检测单元的结构示意图;
图 4为本发明设备实施例三的结构示意图;
图 5-1为本发明设备实施例四的结构示意图;
图 5-2为本发明设备实施例四的视频图像特性统计单元结构示意图; 图 6为本发明方法实施例一的流程图;
图 7为本发明方法实施例二的流程图;
图 8为本发明方法实施例三的流程图;
图 9为本发明方法实施例四的流程图。
具体实施方式
本发明实施例提供一种视频设备和和调节视频图像特性的方法。为使本发 明的目的、 技术方案和优点更加清楚, 下面将进一步对本发明作详细描述。
下面通过设备实施例一至四, 并结合附图进行详细说明。
设备实施例一
参照图 1 , 本发明实施例提供的一种视频设备 100 , 包括: 控制单元 102、 网络通信单元 104、 音视频解码单元 106、 视频图像特性处理单元 108和视频 图像特性调节单元 110。 其中, 网络通信单元 104用于该视频设备与网络的通 讯, 将该视频设备接入到网络, 接收来自网络侧的业务内容信息; 控制单元 102用于对组成该视频设备的各功能单元间的协作进行控制和协调; 音视频解 码单元 106用于对接收到的业务内容信息解码,得到音视频流; 视频图像特性 处理单元 108用于获取对视频图像特性产生影响的要素信息,对所述要素信息 进行处理, 将处理结果反馈给视频图像特性调节单元 110; 视频图像特性调节 单元 110用于根据视频图像特性处理单元 108提供的处理结果,确定调节信息, 对所述业务内容信息对应的视频图像数据进行调节, 或者,对显示电路进行调 节。视频图像特性调节单元 110包括用于根据所述调节信息对所述业务内容信 息对应的视频图像数据进行调节的模块; 和 /或用于根据所述调节信息对显示 电路进行调节的模块。本实施例的视频设备 100还包括:视频后处理单元 114、 音频后处理单元 112、 媒体播放接口单元 116、 外设及扩展接口单元 118。 视 频后处理单元 114用于将视频图像特性调节单元 110输出的视频数据,依据该 视频设备提供的媒体播放接口的模式进行相应的变换处理; 音频后处理单元 112用于将音视频编解码单元 106输出的音频数据, 依据该视频设备提供的媒 体播放接口的模式进行相应的变换处理;媒体播放接口单元 116是该视频设备 与播放单元 /设备的接口, 该单元用于将音、 视频后处理单元输出的音视频流 调节输出到播放设备, 比如电视机或显示终端等。
设备实施例二
参照图 2, 本实施例提供的视频设备 200同设备实施例一相比, 不同在于, 视频图像特性处理单元 108具体为: 环境光线检测单元 202 , 用于测量用户所 处环境的光线,记录并存储测量结果、预设的环境亮度及其对应的视频图像特 性参考信息; 对测量结果进行处理计算,将处理结果反馈给视频图像特性调节 单元 110; 该处理结果可以直接输出到视频图像特性调节单元 110, 也可以输 出到控制单元 102, 然后再进一步由控制单元 102将其输出到视频图像特性调 节单元 110。 具体地, 参照图 3 , 环境光线检测单元 202包括:
一个或多个光敏器件 302 , 用于对环境光线进行实时测量;
存储单元 304 , 用于存储预设的环境亮度及其对应的视频图像特性参考信 息, 以及前一次视频图像特性调节时所测得的环境亮度值等信息;
处理单元 306 , 用于根据测量结果和存储单元 304中的信息进行处理, 将 处理结果反馈给视频图像特性调节单元 110。
环境光线检测单元 202通过光敏器件对环境的光线强度进行实时测量(有 多个光敏器件时, 需要对每个光敏器件的测量结果综合统计)。 存储单元 304 中保存有预设的环境亮度与对应的视频图像特性信息的参 考值, 该参考值可以根据历次的调节信息被更新, 并能够从视频图像特性调节 单元 110获得当前视频图像的特性信息。
处理单元 306每次为视频图像特性调节单元 110输出结果后,将该时刻的 环境亮度值记录到存储单元 304, 在后续时段当发现实时检测到的环境亮度值 与前次记录的环境亮度值之差大于预设的阔值时,再次为视频图像特性调节单 元 110输出新的结果, 并将该时刻的环境亮度值记录到存储单元 304。
视频图像特性调节单元 110用于根据接收到的环境光线检测单元 202输出 的光线测量和处理结果, 确定调节信息,对音视频编解码单元 106输出的视频 图像数据进行调节。因为该处理主要是针对由于环境光线的变化带来的用户视 觉的需求, 可以釆用图像处理技术中"线性灰度变换,,的方法。 依据该方法, 假 定由音视频编解码单元输出的图像中象素点 (x, y )处的灰度级为 f ( X, y ), 处理后相应象素点处的灰度级为 g ( x, y ) , 如果 f ( x, y ) 的灰度范围为 [a, b] , 期望变换后的图像 g ( x , y )灰度的动态变化范围为 [c, d] , 则可用如下 变换来实现:
, 、 Cd-c) [fCx,y)-a]
gtx.y) = +
b-a
其中, a、 b可通过对音视频编解码单元 106输出的当前的视频图像数据统 计得到, c、 d由预设的环境亮度与对应的视频图像特性信息的参考值以及来自 环境光线检测单元 202输出的视频图像特性调节信息, 按既定的调节策略综合 确定。上述方案中视频图像特性调节的方法是通过软件功能对图像解码后的数 据进行变换处理实现的, 不需要专用的芯片。 除此以外, 还可以在图像后处理 时通过硬件线路对 D/A转换后合成的模拟视频流中的相应信号分量进行调节 实现。
设备实施例三
参照图 4 ,本实施例提供的视频设备 400同设备实施例一相比,不同在于, 视频图像特性处理单元 108具体为: 业务类型感知单元 402 , 用于存储预设的 业务内容信息的类型及其对应的视频图像特性的调节信息;获取当前视频设备 所接收到的业务内容信息的类型信息,根据该类型信息确定与其相对应的视频 图像特性的信息; 将该信息反馈给视频图像特性调节单元 110。 视频图像特性 调节单元 110接收来自业务类型感知单元 402的信息,确定视频图像特性调节 信息, 根据该调节信息对业务内容信息对应的视频图像数据进行调节, 或者, 对显示电路进行调节。
业务类型感知单元 402包括: 存储单元、业务类型获取单元和视频图像特 性确定单元。其中,存储单元用于存储预设的业务内容信息的类型及其对应的 视频图像特性的调节信息;业务类型获取单元用于获取当前视频设备所接收到 的业务内容信息的类型信息;视频图像特性确定单元用于根据所述第二存储单 元中的存储信息, 确定与所述类型信息相对应的视频图像特性信息, 并将确定 的视频图像特性信息发送给所述视频图像特性调节单元。
一般地, 用户对不同的业务内容信息, 如网页、 电影、 游戏、 电子文档等 的视觉要求是不同的, 如对电影, 会要求色彩亮度相对鲜明些, 对电子文档则 要求亮度相对柔和暗淡些。用户可以针对不同的业务内容信息类型预设其对应 的视频图像特性, 如电影, 设置亮度 80 , 对比度 75; 对电子文档阅读, 设置 亮度 70, 对比度 55。 该单元实时感知业务内容信息的变化, 根据变化向视频 图像特性调节单元 110反馈信息。
在本实施中,对视频图像特性调节单元的具体实现可以通过软件或硬件的 方式实现。视频图像特性调节单元可以是软件模块, 实现对解码后的视频图像 数据进行调节,具体技术细节已经在设备实施例二中详细介绍,在此不再赘述。 视频图像特性调节单元也可以是硬件电路, 该电路在图像后处理时对 D/A转 换后合成的模拟视频流中的相应信号分量进行调节。
设备实施例四
参照图 5-1 , 本实施例提供的视频设备 500同设备实施例一相比, 不同在 于, 视频图像特性处理单元 108具体为: 视频图像特性统计单元 502 , 参照图 5-2, 具体可以包括:
存储单元 504 , 用于存储预设的参考视频图像特性信息;
统计计算单元 506, 用于对音视频编解码单元 106输出的视频图像数据 进行统计,将统计的结果与存储单元 504中预设的参考视频图像特性信息进行 比较, 将该处理结果反馈给视频图像特性调节单元 110。 视频图像特性调节单元 110根据该处理结果,确定对当前视频图像特性的 调节信息, 根据该调节信息对所述业务内容信息对应的视频图像数据进行调 节。
本发明设备实施例所提供的视频设备, 可以是机顶盒、 集成机顶盒功能的 显示终端、 家庭媒体设备、 电视机、 计算机显示终端、 视频眼镜、 移动通信终 端 (如手机等)、 移动数字娱乐设备(如 MP4播放器)等。
上述各实施例分别以环境光线、业务类型等信息单独作为对视频图像数据 进行调节的参考信息,对调节视频图像特性的方法进行了说明, 本发明并不限 于这几种方式,也可以综合考虑这些信息来确定对视频图像数据进行调节的参 考信息。在具体实现时, 可以由视频图像特性处理单元综合考虑这些信息来确 定对视频图像数据进行调节的参考信息;也可以由视频图像特性处理单元将这 些信息报告给视频图像特性调节单元,再由视频图像特性调节单元综合考虑这 些信息来确定对视频图像数据进行调节的参考信息。
针对设备实施例一至四, 对相应的方法实施例进行说明。
方法实施例一
参照图 6 ,本实施例提供一种调节视频图像特性的方法,应用于视频设备, 包括:
S602 , 视频设备接收来自网络侧的业务内容信息;
S604,视频设备获取对视频图像特性产生影响的要素信息,对要素信息进 行处理, 确定调节信息;
S606,视频设备根据调节信息,对业务内容信息对应的视频图像数据进行 调节, 或者, 对显示电路进行调节。
方法实施例二
本实施例的方法是基于方法实施例一的拓展, 步骤"获取对视频图像特性 产生影响的要素信息"包括: 测量用户所处环境的光线。 参照图 7:
S702 , 视频设备接收来自网络侧的业务内容信息;
S704, 视频设备对业务内容信息进行解码, 还原得到音视频的数据; S706, 视频设备测量用户所处环境的光线;
S708,视频设备根据对环境光线的测量结果、视频设备上存储的预设的环 境亮度及其对应的图像特性参考信息,以及前一次所测量的环境亮度值进行处 理计算, 得到调节信息;
S710, 视频设备根据调节信息, 对视频图像数据进行调节, 或者, 对显示 电路进行调节。
方法实施例三
本实施例的方法是基于方法实施例一的拓展, 步骤"获取对视频图像特性 产生影响的要素信息"包括: 获取当前视频设备所接收到的业务内容信息的类 型信息。 参照图 8:
S802 , 视频设备接收来自网络侧的业务内容信息;
S804, 视频设备获取当前视频设备所接收到的业务内容信息的类型信息;
S806,视频设备根据业务内容信息的类型信息, 查找存储在该视频设备上 存储的预设的与其相对应的视频图像特性的调节信息;
S808, 视频设备根据所述调节信息, 对视频图像数据进行调节, 或者, 对 显示电路进行调节。
方法实施例四
本实施例的方法是基于方法实施例一的拓展, 步骤"获取对视频图像特性 产生影响的要素信息"包括: 对视频图像数据进行统计, 得到统计结果。 参照 图 9:
S902 , 视频设备接收来自网络侧的业务内容信息;
S904, 视频设备对所述业务内容信息进行解码, 还原得到音视频的数据;
S906, 视频设备对视频图像数据进行统计, 得到统计结果;
S908 , 视频设备根据所述统计结果与该视频设备上存储的预设的参考视 频图像特性信息, 确定视频图像特性的调节信息, 输出该调节信息;
S910, 视频设备根据所述调节信息, 对视频图像数据进行调节。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件来完成,所述的程序可以存储于一计算机可 读取存储介质中, 所述的存储介质, 如: ROM/RAM、 磁碟、 光盘等。
本发明实施例的设备和方法通过视频设备获取对视频图像特性产生影响 的要素信息, 包括: 环境光线、 业务类型等, 根据该要素信息确定调节信息, 并对所述业务内容信息对应的视频图像数据进行调节, 或者,对显示电路进行 调节。 实现了 "屏变 "自动化和智能化,緩解了人视觉疲劳,减少了手动的麻烦, 增强了用户体验; 本发明实施例的技术方案可以应用于多种类型的显示器, 适 用范围广; 可以通过软件实现, 不依赖于专用芯片, 可扩展和可维护性强, 成 本较低。
上述实施例仅用于说明本发明, 而非用于限定本发明。 显然, 本领域的技 术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 这 样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之 内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1. 一种视频设备, 其特征在于, 包括:
网络通信单元, 用于接收来自网络侧的业务内容信息;
视频图像特性处理单元, 用于获取对视频图像特性产生影响的要素信息, 并将所述要素信息发送给视频图像特性调节单元;
视频图像特性调节单元,用于根据所述视频图像特性处理单元提供的要素 信息,确定调节信息,并根据所述调节信息调节所述业务内容信息的视频特性。
2. 如权利要求 1 所述的视频设备, 其特征在于, 所述视频图像特性处理 单元包括以下单元之一或任意组合: 环境光线检测单元、 业务类型感知单元、 视频图像特性统计单元;
所述环境光线检测单元, 用于测量用户所处环境的光线, 并才艮据测量结果 及预设的环境亮度及其对应的视频图像特性参考信息,确定当前环境光线特性 信息, 并将确定的信息发送给所述视频图像特性调节单元;
所述业务类型感知单元,用于获取当前视频设备所接收到的业务内容信息 的类型信息, 并根据该类型信息确定与其相对应的视频图像特性信息, 并将确 定的信息发送给所述视频图像特性调节单元;
所述视频图像特性统计单元, 用于对视频图像数据进行统计,将统计结果 与预设的参考视频图像特性信息进行比较,将比较结果发送给所述视频图像特 性调节单元。
3. 如权利要求 2所述的视频设备, 其特征在于, 所述环境光线检测单元 包括:
光敏器件, 用于对环境光线进行实时测量;
第一存储单元,用于存储预设的环境亮度及其对应的视频图像特性参考信 息, 以及前一次所测量的环境亮度值;
处理单元,用于根据所述光敏器件的测量结果和所述第一存储单元中的信 息确定当前环境光线特性信息,将确定的信息发送给所述视频图像特性调节单 元。
4. 如权利要求 2所述的视频设备, 其特征在于, 所述业务类型感知单元 包括: 第二存储单元,用于存储预设的业务内容信息的类型及其对应的视频图像 特性的调节信息;
业务类型获取单元,用于获取当前视频设备所接收到的业务内容信息的类 型信息;
视频图像特性确定单元, 用于根据所述第二存储单元中的存储信息,确定 与所述类型信息相对应的视频图像特性信息,并将确定的视频图像特性信息发 送给所述视频图像特性调节单元。
5. 如权利要求 1 所述的视频设备, 其特征在于, 所述视频图像特性统计 单元包括:
第三存储单元, 用于存储预设的参考视频图像特性信息;
统计计算单元, 用于对视频图像数据进行统计,将统计结果与所述第三存 储单元中预设的参考视频图像特性信息进行比较,将比较结果发送给所述视频 图像特性调节单元。
6. 如权利要求 1 ~ 5任一项所述的视频设备, 其特征在于, 所述视频图像 特性调节单元包括:
根据所述调节信息对所述业务内容信息对应的视频图像数据进行调节的 模块; 和 /或,
根据所述调节信息对显示电路进行调节的模块。
7. 如权利要求 1 所述的视频设备, 其特征在于, 该视频设备的类型包括 以下任意一种或其任意组合: 机顶盒、 集成机顶盒功能的显示终端、 家庭媒体 设备、 电视机、 计算机显示终端、 视频眼镜、 移动通信终端、 移动数字娱乐设 备。
8. 一种调节视频图像特性的方法, 其特征在于, 包括:
接收来自网络侧的业务内容信息;
获取对视频图像特性产生影响的要素信息,并根据所述要素信息确定调节 信息;
根据所述调节信息调节所述业务内容信息的视频特性。
9. 权利要求 8所述方法, 其特征在于, 所述获取对视频图像特性产生影 响的要素信息包括: 测量用户所处环境的光线;
根据测量结果及预设的环境亮度及其对应的图像特性参考信息,确定当前 环境光线特性信息。
10. 如权利要求 8所述方法, 其特征在于, 所述获取对视频图像特性产生 影响的要素信息包括:
获取当前视频设备所接收到的业务内容信息的类型信息;
确定与所述类型信息相对应的视频图像特性的信息。
11. 如权利要求 8所述方法, 其特征在于, 所述获取对视频图像特性产生 影响的要素信息包括: 对视频图像数据进行统计, 并将统计结果与预设的参考 视频图像特性信息进行比较, 确定比较结果。
12. 如权利要求 8 ~ 11任一项所述方法, 其特征在于, 所述根据所述调节 信息调节所述业务内容信息的视频特性包括:
根据所述调节信息对所述业务内容信息对应的视频图像数据进行调节;和
/或,
根据所述调节信息对显示电路进行调节。
PCT/CN2007/071346 2007-04-09 2007-12-27 Dispositif video et procede de reglage des caracteristiques d'une image video WO2008122184A1 (fr)

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CN102056368B (zh) * 2009-10-28 2013-08-07 华为终端有限公司 视频通讯中会场环境控制方法及装置
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