CN113365083A - 一种基于h.265实现yuv444图像编解码方法 - Google Patents

一种基于h.265实现yuv444图像编解码方法 Download PDF

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CN113365083A
CN113365083A CN202110772406.1A CN202110772406A CN113365083A CN 113365083 A CN113365083 A CN 113365083A CN 202110772406 A CN202110772406 A CN 202110772406A CN 113365083 A CN113365083 A CN 113365083A
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CN113365083B (zh
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郭洪猛
张常华
朱正辉
赵定金
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Guangdong Baolun Electronics Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234363Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
    • H04N21/234372Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution for performing aspect ratio conversion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/186Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a colour or a chrominance component
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/436Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation using parallelised computational arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/23418Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
    • 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
    • H04N21/4402Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440263Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
    • H04N21/440272Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA for performing aspect ratio conversion

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Abstract

本发明公开一种基于H.265实现YUV444图像编解码方法,包括:获取1080P的YUV444图像,从1080P的YUV444图像中提取出Y分量、U分量和V分量;将目标图像划分为4个区域,4个区域记为第一区域、第二区域、第三区域和第四区域;将1080P的YUV444图像的Y分量、U分量和V分量依次作为第一区域的Y分量、第二区域的Y分量、第三区域的Y分量,第一区域、第二区域和第三区域的U分量和V分量均设置为0,将第四区域的Y分量、U分量和V分量均设置为0,从而将第一区域、第二区域、第三区域和第四区域组成的目标图像构成4K的YUV444图。本发明可基于H.265实现图像编解码,并提高图像清晰度。

Description

一种基于H.265实现YUV444图像编解码方法
技术领域
本发明涉及YUV444图像编解码技术领域,具体涉及一种基于H.265实现YUV444图像编解码方法。
背景技术
现有的H.265编解码器是基于YUV420格式的图像进行编解码的。相比于YUV444图像,YUV420图像由于每4个像素有4个Y分量(即亮度分量)、2个色度分量(包括1个U分量、1个V分量),其图像质量(主要在于色度方面)低于YUV444图像。Y分量、U分量、V分量也依次称为亮度分量、蓝色色度分量、红色色度分量。因此,为了提高图像质量,需要进行YUV444编码。但现有的H.265编解码器都是基于YUV420图像实现图像编解码,H.265编解码器可以实现4K图像传输,故而有必要在提高分辨率(例如达到4K)的同时,提高图像质量(例如色彩信息度),有必要实现基于H.265达到YUV444图像编解码的方法。
发明内容
针对现有技术的不足,本发明的目的提供一种基于H.265实现YUV444图像编解码方法,其能够解决提高图像质量的问题;
实现本发明的目的的技术方案为:一种基于H.265实现YUV444图像编解码方法,包括以下步骤:
获取1080P的YUV444图像,从1080P的YUV444图像中提取出Y分量、U分量和V分量;
将目标图像划分为4个区域,4个区域记为第一区域、第二区域、第三区域和第四区域;
将1080P的YUV444图像的Y分量、U分量和V分量依次作为第一区域的Y分量、第二区域的Y分量、第三区域的Y分量,第一区域、第二区域和第三区域的U分量和V分量均设置为0,将第四区域的Y分量、U分量和V分量均设置为0,从而将第一区域、第二区域、第三区域和第四区域组成的目标图像构成4K的YUV444图像。
进一步地,得到4K的YUV444图像之后,还包括以下步骤:
将4K的YUV444图像经H.265编码器进行YUV420编码,经网络传输给终端后进行YUV420解码,并将解码后的图像再进行逆向操作,得到YUV444图像。
进一步地,第一区域、第二区域、第三区域和第四区域的尺寸相同。
进一步地,目标图像中,以第一区域为基准,第二区域和第三区域分别位于第一区域相邻的两侧,第四区域位于第二区域和第三区域所围成的夹角区域。
本发明的有益效果为:本发明能够很好地实现将1080P的YUV44图像基于H.265实现图像编解码,并提高图像清晰度。
附图说明
图1是较佳实施例的流程示意图;
图2是目标图像中第一区域、第二区域、第三区域和第四区域的关系示意图。
具体实施方式
下面,结合附图以及具体实施方案,对本发明做进一步描述。
如图1和图2所示,一种基于H.265实现YUV444图像编解码方法,包括以下步骤:
获取分辨率为1920*1080(简称为1080P)的YUV444图像,从分辨率为1080P的YUV444图像中提取出Y分量、U分量和V分量。
对于YUV444图像,图像中的每个像素点均包括3部分:Y分量、U分量(也叫Cb分量)和V分量(也叫Cr分量)。而分辨率为1080P的YUV444图像共有1920*1080个像素点,因此,分辨率为1080P的YUV444图像拆分出来的Y分量是所有像素点的Y分量之和,U分量和V分量也是如此,都是所有像素点的U分量或V分量之和。
将目标图像按尺寸大小均等划分为4个区域,每个区域大小相同,从左至右、从上至下依次记为第一区域、第二区域、第三区域和第四区域。目标图像也即是一个空白图像,图像中没有任何像素点信息而处于空白。参考图2,以第一区域为基准,第二区域和第三区域分别位于第一区域相邻的两侧,第四区域位于第二区域和第三区域所围成的夹角区域。例如,第二区域位于第一区域的右侧,第三区域位于第一区域的下侧,而第一区域的右侧和下侧正好是相邻的两侧,第二区域的下侧、第三区域的右侧刚好围成一个带有开口的夹角区域,该带有开口的夹角区域正好是第四区域。
将分辨率为1080P的YUV444图像的Y分量填充在第一区域,作为第一区域的Y分量,第一区域的U分量和V分量均设置为0。将分辨率为1080P的YUV444图像的U分量填充在第二区域,作为第二区域的Y分量,第二区域的U分量和V分量均设置为0。将分辨率为1080P的YUV444图像的V分量填充在第三区域,作为第三区域的Y分量,第三区域的U分量和V分量均设置为0。将第四区域的Y分量、U分量和V分量均设置为0。
将第一区域、第二区域、第三区域和第四区域组成的目标图像即是得到分辨率为4K的YUV444图像。将分辨率为4K的YUV444图像经H.265编码器进行YUV420编码后再通过网络传输给终端,终端再进行YUV420解码,并将解码后的图像再进行逆向操作,得到YUV444图像,从而可以在终端进行播放。从而可通过低成本的YUV420编解码实现YUV444编解码,并提高了图像质量。
本步骤中,由于H.265编码器是对4K图像进行编解码处理,因此,需要输入分辨率为4K的YUV444图像。
其中,所述逆向操作,也即是从第一区域、第二区域、第三区域分别提取出的三个Y分量依次作为解码后YUV444图像的Y分量、U分量和V分量,从而合成一个YUV444图像,即得到解码后的YUV444图像。
本实施例能够很好地实现将1080P的YUV44图像基于H.265实现图像编解码,并提高图像清晰度。
本说明书所公开的实施例只是对本发明单方面特征的一个例证,本发明的保护范围不限于此实施例,其他任何功能等效的实施例均落入本发明的保护范围内。对于本领域的技术人员来说,可根据以上描述的技术方案以及构思,做出其它各种相应的改变以及变形,而所有的这些改变以及变形都应该属于本发明权利要求的保护范围之内。

Claims (4)

1.一种基于H.265实现YUV444图像编解码方法,其特征在于,包括以下步骤:
获取1080P的YUV444图像,从1080P的YUV444图像中提取出Y分量、U分量和V分量;
将目标图像划分为4个区域,4个区域记为第一区域、第二区域、第三区域和第四区域;
将1080P的YUV444图像的Y分量、U分量和V分量依次作为第一区域的Y分量、第二区域的Y分量、第三区域的Y分量,第一区域、第二区域和第三区域的U分量和V分量均设置为0,将第四区域的Y分量、U分量和V分量均设置为0,从而将第一区域、第二区域、第三区域和第四区域组成的目标图像构成4K的YUV444图像。
2.根据权利要求1所述的基于H.265实现YUV444图像编解码方法,其特征在于,得到4K的YUV444图像之后,还包括以下步骤:
将4K的YUV444图像经H.265编码器进行YUV420编码,经网络传输给终端后进行YUV420解码,并将解码后的图像再进行逆向操作,得到YUV444图像。
3.根据权利要求1所述的基于H.265实现YUV444图像编解码方法,其特征在于,第一区域、第二区域、第三区域和第四区域的尺寸相同。
4.根据权利要求1或3所述的基于H.265实现YUV444图像编解码方法,其特征在于,目标图像中,以第一区域为基准,第二区域和第三区域分别位于第一区域相邻的两侧,第四区域位于第二区域和第三区域所围成的夹角区域。
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