CN102710935A - Method for screen transmission between computer and mobile equipment through incremental mixed compressed encoding - Google Patents

Method for screen transmission between computer and mobile equipment through incremental mixed compressed encoding Download PDF

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CN102710935A
CN102710935A CN2011103815886A CN201110381588A CN102710935A CN 102710935 A CN102710935 A CN 102710935A CN 2011103815886 A CN2011103815886 A CN 2011103815886A CN 201110381588 A CN201110381588 A CN 201110381588A CN 102710935 A CN102710935 A CN 102710935A
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data
screen
method
pixel
step
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CN2011103815886A
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周永军
戴崇坚
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杭州华银教育多媒体科技股份有限公司
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Priority to CN2011103815886A priority Critical patent/CN102710935A/en
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Abstract

The invention discloses a method for screen transmission between a computer and mobile equipment through incremental mixed compressed encoding. The method comprises the following steps of: acquiring screen data on the computer, and performing image encoding on the acquired screen data to form screen frame image data; performing incremental computation on the current screen frame image datum and the previous screen frame image datum by using an incremental computation method, and acquiring incremental data; performing mixed compressed encoding on the current screen frame image datum and the incremental data to form an incremental data packet; and comparing the size of the incremental data packet with the size of the current screen frame image datum, and transmitting the smaller one to the mobile equipment.

Description

计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法 Between the computer and the mobile device by the amount of enlargement of hybrid compression coding method of a screen transmission

技术领域 FIELD

[0001] 本发明是一种在计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法,尤其通过增量混合压缩编码的方法,在保障屏幕图像品质前提下降低传输数据量,属于计算机图像处理与网络传输技术领域。 [0001] The present invention is a method for hybrid coding by enlargement of the amount of compression between the mobile computer and screen transmission device, in particular by compression coding method of mixing an incremental decrease in the amount of data transmitted under the protection of the screen image quality premise, the image belonging to the computer BACKGROUND processing and network transmission.

背景技术 Background technique

[0002] 现有屏幕传输方法中对屏幕数据处理主要是图像方式和视频方式两种。 [0002] In the conventional method of transmitting screen data processing screen mode and the video images are primarily two ways.

[0003] 图像方式下,屏幕数据被按照一定的频率采集成图像数据帧进行处理和传输。 [0003] The case where the image mode, the screen data is collected according to a certain frame frequency into an image data processing and transmission. 该方式优点是图像数据编码被设备支持性广,方便控制传输帧率和传输数据量。 This embodiment is the advantage that image data encoding apparatus supporting a wide, easy to control the frame rate and transmission data volume. 该方式的限制是当要求高图像质量吋,需要高的数据量,带来编码计算和传输的压力,反之,图像数据编码数据量较低,带来图像质量的下降。 This approach is restricted when the required high image quality inches, a high amount of data, and calculated to bring the pressure transmitted encoded, on the contrary, the lower the image data amount of coded data, bring about a decline in image quality. 该方式由于帧率的限制,适合处理屏幕内容相对静止的情况。 This way the frame rate due to the limitation of screen content suitable for handling relatively static situation.

[0004] 视频方式下,屏幕数据被进行视频编码并按照视频流的方式传输,该方式优点是适合处理屏幕内容相对动态的情況。 The [0004] video mode, video screen data is encoded and transmitted in the manner of the video stream, the advantage of the embodiment where the screen content suitable for handling relatively dynamic. 该方式的限制是流编码对设备计算能力和传输能力要求都比较高,往往难以适用于设备处理能力较低的情況。 The approach is to limit the flow of the encoding device and the computing power transmission capacity requirements are high, are often difficult to apply to the processing capabilities of the lower case.

[0005] 科技的日新月异,智能手机、平板电脑等新型移动设备产品不断涌现,同普通计算机相比,这些设备硬件整体性能较低、计算能力较差、屏幕尺寸较小等。 [0005] technological advances, smart phones, tablet PCs and other mobile devices new products continue to emerge, as compared with ordinary computer, these lower the overall performance of hardware devices, poor computing power, smaller screen sizes. 在进行屏幕传输吋,需要重点解决处理性能、图像质量、传输同步性等方面的问题。 Inch screen during transmission, need to focus on problem-solving process performance, image quality, and other aspects of the transmission synchronization.

发明内容 SUMMARY

[0006] 本发明的目的在于提供一种计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法,所述方法对屏幕数据进行图像方式处理,通过增量混合编码的方法,在保障屏幕图像品质前提下降低传输数据量,解决传输的数据量和传输处理间矛盾的问题。 [0006] The object of the present invention is characterized by enlargement of the amount of coding method for hybrid compression transmission screen provided between a computer and a mobile device, the method of screen image data processing mode, the incremental hybrid coding method, the image protection screen reduce the amount of data transfer under the premise of quality, to solve the problems between the amount of data transferred and the transfer process contradictory.

[0007] 为实现上述发明目的,本发明采用下述技术方案予以实现: [0007] In order to achieve the above object, the present invention be implemented using the following technical scheme:

一种计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法,包括: Between a computer and the mobile device by the amount of enlargement of hybrid compression coding method for transmission screen, comprising:

步骤一,采集计算机屏幕数据,对采集到的屏幕数据进行图像编码形成屏幕帧图像数据;图像编码方法是JPEG、JPEG2000、BMP、PNG等的ー种或多种但不限于,较优的是选择硬件设备能够支持进行硬件编解码计算的,提高运算速度;较优的JPEG等属于静止图像压缩编码技术,JPEG具有失真小、压缩率高、多种设备支持硬件编码和硬件解码速度快的优势;步骤ニ,使用増量计算方法,将当前屏幕帧图像数据和前一屏幕帧图像数据进行増量计算,获取増量数据;增量计算方法是按照像素行的方式对屏幕帧图像数据进行分组,通过比较前ー屏幕帧图像数据的对应分组数据是否相同,判断是否产生变化,所有变化的分组数据构成増量数据; 步骤三,将当前屏幕帧图像数据与增量数据进行混合压缩编码,获取増量数据包;混合压缩编码是按照像素行的方式对屏幕帧图 Step one, the data acquisition computer screen, the screen data collected an image forming screen frame image encoded data; image coding method is JPEG, JPEG2000, BMP, PNG, etc. ー or more of, but not limited, to select superior hardware capable of supporting hardware codec calculated improve the speed; superior JPEG or the like belonging to a still image compression coding technique, JPEG has distortion, compression rate, fast multiple devices support hardware encoding and decoding hardware speed advantage; step ni using zo calculation method, the current screen frame image data and the previous screen frame image data for enlargement of the amount of calculation, acquisition zo data amount; increment is calculated by grouping screen frame image data according to the embodiment of pixel rows by the comparison whether the corresponding packet data ー screen frame image data is the same, it is determined whether a change in the packet data and all changes constituting zo data amount; step three, the current screen frame image data and the incremental data may be hybrid compression encoding acquired enlargement of the amount of data packets; mix a compression coding manner to the screen frame pixel row in FIG. 数据进行分组;以当前屏幕帧图像数据为基础;比较增量数据与当前屏幕帧图像数据进行混合编码;对增量数据中的全部像素进行压缩编码;压缩取样方法是比较每个像素点与其所在行的前一行的对应位置的像素点是否相同,比较每个像素点与其所在行的前一个像素点是否相同; Data packets; the current frame image data based on the screen; Comparative incremental data may be hybrid coded frame image data of the current screen; all the pixels of the incremental data compression coding; compression method is to compare each sampled pixel and its location pixel corresponding to the position before the line is the same row, preceding pixel comparing each pixel and its row are the same;

步骤四,比较增量数据包与当前屏幕帧图像数据的大小,较小的传输到移动设备端。 Step four, the comparison with the current delta packet size screen frame image data transmitted to the mobile device smaller end.

[0008] 如上所述的方法,步骤ニ是为了減少方法计算数据量,増加方法的计算速度的优化步骤,该步骤可选。 [0008] The method described above, the step of reducing ni optimization step is to calculate the amount of data rate, to increase in the calculation method, this step is optional.

[0009] 如上所述的方法,所述步骤ニ、步骤四中的像素行方式分组是当前屏幕技术条件下较优的一种分组方式,也可采取像素列、像素块等方式进行分组实现。 [0009] The method described above, the step of writing is, the pixel row mode packet Fourth step A packet superior way the current screen technical conditions, can also take the pixel column, the pixel block, etc. grouping implemented.

[0010] 如上所述的方法,所述步骤三中的混合压缩编码中,压缩取样方法是综合选用了比较姆个像素点与其所在行的前一行的对应位置的像素点是否相同,比较姆个像素点与其所在行的前一个像素点是否相同这两种取样方式,这两种取样方式是目前屏幕技术下较优的方法,但压缩取样方式不限于选用ー种或两种或其他取样方式。 [0010] The method described above, mixing of the three compression-encoding step, the compression method is a comprehensive sampling of selected positions corresponding to pixels of previous row one pixel and its comparison Tim row are the same, a comparison Farm a pixel before pixel row is the same as its two sampling method, the two samples is a method of the presently preferred screen technology, but the compression is not limited to the choice of sampling one or two or ー other sampling method.

[0011] 本发明相对于现有方法具有以下的优点: [0011] The present invention has the following advantages over conventional methods:

I、本发明能依据设备硬件编码支持情况调整,可充分发挥设备硬件计算能力。 I, the present invention can be adjusted according to the encoding support hardware devices, the hardware devices can take advantage of the computing power. 支持设备类型广泛,尤其对智能手机、平板电脑等计算能力较低、屏幕尺寸较小的设备有更好的支持性。 Supports a wide range of equipment types, especially for lower smart phones, tablet PCs and other computing power, screen size smaller devices have a better supporting.

[0012] 2、本发明提出的増量混合压缩编码方法,图像数据比较和计算速度快,数据表示压缩比高。 [0012] 2, an amount zo of the present invention proposed hybrid compression coding method, an image data comparison and calculation speed, data representing the compression ratio.

[0013] 3、本发明仅传输屏幕变化的增量数据与屏幕数据的较小者,能大幅度减少数据处理和传输量;在屏幕内容相对变化较少的情况下,传输效果特别理想。 [0013] 3, transmitting only variations of the present invention, the screen smaller incremental data with the screen data, can greatly reduce the amount of data processing and transmission; in the case of screen content changes relatively little, the transmission effect is particularly desirable.

附图说明 BRIEF DESCRIPTION

[0014] 图I本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法的流程图; [0014] The flowchart of FIG. I by enlargement of the amount of hybrid compression coding method of a screen transmission between the computer and the mobile device according to the present invention;

图2本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法的屏幕数据样例图; FIG sample screen data compression encoding method of mixing between the computer and the mobile device of FIG invention by enlargement of two transmission amount of the screen;

图3顔色标识方案RGB下的像素数据表示图; FIG pixel data of the RGB three color-coded representation of FIG scheme;

图4本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法的像素数据表示图; Zo amount of the mixed pixel data compression method for encoding a screen transmission between the computer and the mobile device of FIG invention is represented in FIG 4;

图5本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法的混合压缩编码计算顺序图; By enlargement of the amount of hybrid compression coding method of a screen transmission between the computer and the mobile device invention FIG 5 FIG hybrid compression coding sequence is calculated;

图6本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法的混合压缩编码结果数据样例图。 FIG 6 by mixing an amount of enlargement of the screen for hybrid compression coding method of transmission between the mobile device and the computer to the invention result of compression encoding data sample in FIG.

[0015] [0015]

具体实施方式 Detailed ways

[0016] 下面结合附图和具体实施方式对本发明的技术方案进行进ー步说明,但本发明的实施方式不限于此。 [0016] Next, the technical solution of the present invention will be further described in conjunction with the accompanying drawings ー intake and specific embodiments, but the embodiments of the present invention is not limited thereto.

[0017] 实施例如图I所示,本发明计算机与移动设备间通过増量混合压缩编码进行屏幕传输的方法,主要步骤如下: [0017] The example embodiment shown in FIG. I, the present invention is between a computer and the mobile device by the amount of enlargement of hybrid compression coding method for transmission screen, mainly the following steps:

步骤一,采集计算机屏幕数据,对采集到的屏幕数据进行图像编码形成屏幕帧图像数据。 Step one, the data acquisition computer screen, the collected data is a screen image encoding frame image data forming screen. 常见的图像化编码处理方法包括: Common image processing method of encoding comprising:

JPEG等属于静止图像压缩编码技木,JPEG具有失真小、压缩率高、设备端硬件编码和硬件解码速度快的优势; JPEG still image compression coding, etc. to wood technology, having a distortion JPEG compression rate, fast hardware encoding device side and the decoding speed advantage of the hardware;

MPEG等属于运动图像压缩编码技术,对于屏幕图像特定的场景下,MPEG的失真较大,并且,实现实时压缩传输,对发送方的CPU性能要求高; MPEG compression, etc. to a moving image coding technique, a screen image for the particular scene, MPEG large distortion, and the real-time compression and transmission, high CPU performance requirements for the sender;

完全増量方式(类似VNC),无失真,在屏幕变化小的情况下,信息量小,但在高分辨率下,当屏幕变化大时,増量信息大,对设备计算能力要求高。 Zo full amount embodiment (similar to the VNC), without distortion, in a small screen changes, the small amount of information, but in a high-resolution, large screen when the change, enlargement of the amount of information, high computing power requirements of the device.

[0018] 屏幕数据的图像不完全属于静止图像和运动图像。 [0018] The screen image data is not entirely still images and moving images. 采集屏幕数据的图像化编码采用JPEG方案。 Gathering image data of the screen using the JPEG coding scheme.

[0019] 步骤ニ,使用増量计算方法,将当前屏幕帧图像数据和前一屏幕帧图像数据进行増量计算,获取增量数据;增量计算方法是按照像素行的方式对屏幕帧图像数据进行分组,通过比较前一屏幕帧图像数据的对应分组数据是否相同,判断是否产生变化,所有变化的分组数据构成增量数据。 [0019] Step ni using zo calculation method, the current screen frame image data and the previous screen frame image data for enlargement of calculation, obtain incremental data; increment is calculated by grouping screen frame image data according to the embodiment of pixel rows , are the same through the corresponding packet data comparing the previous screen frame image data, determining whether a change, and all changes which packet data constituting the incremental data.

[0020] 屏幕数据按照从上到下的顺序划分成行,从左到右的顺序划分成列,行和列均从0开始计数。 [0020] The screen data is divided in order from top to bottom row, from left to right is divided into columns, rows and columns are counted from 0. 实现中,按照行列的下标顺序,从0行0列开始比较,当每行的全部列比较完成后,继续比较下一行,直至屏幕全部比较完成。 Implemented in accordance with the order of the ranks of the subscript, starting from 0 Comparative row 0, when all of the columns in each line is completed, the comparison continues to the next row, until all of the screen to complete the comparison. 为叙述简单,仅用13行*16列说明技术过程,如图2所示,当前帧与前一帧的增量数据范围在从第2行的第7列到第5行的第8列的矩形范围内。 Is a simple description, only 13 rows * 16 illustrate the technical process, shown in Figure 2, the current frame and a previous frame in the range of incremental data from column 7 of the second row to the second row of 8 columns 5 rectangular range.

[0021] 步骤三,将当前屏幕帧图像数据与增量数据进行混合压缩编码,获取増量数据包;混合压缩编码是按照像素行的方式对屏幕帧图像数据进行分组;以当前屏幕帧图像数据为基础;比较增量数据与当前屏幕帧图像数据进行混合编码;对增量数据中的全部像素进行压缩编码;压缩取样方法是比较每个像素点与其所在行的前一行的对应位置的像素点是否相同,比较每个像素点与其所在行的前一个像素点是否相同。 [0021] Step three, the current screen frame image data and the incremental data may be hybrid compression encoding acquired enlargement of the amount of data packets; hybrid compression encoding are grouped for the screen frame image data in the manner pixel row; the current screen frame image data basis; Comparative incremental data may be hybrid coded frame image data of the current screen; all the pixels of the incremental data compression coding; compression method is the sampling point corresponding to a pixel row position before comparing each pixel row whether its the same as the previous pixel comparing each pixel and its row are the same.

[0022] 计算机彩色显示器显示色彩的原理是采用R (Red)、G (Green)、B (Blue)相加混色的原理:通过发射出三种不同強度的电子束,使屏幕内侧覆盖的红、绿、蓝磷光材料发光而产生色彩。 [0022] Computer color display is to use the principle of display colors R (Red), G (Green), B (Blue) color mixing principle of adding: an electron beam emitted by three different intensities, so that the screen covering the inside of the red, green and blue light-emitting phosphorescent material to produce a color. 这种色彩的表示方法称为RGB色彩空间表示,它也是多媒体计算机技术中用得最多的ー种色彩空间表示方法。 This color representation is called RGB color space is represented, it is also a multimedia computer art ー species most frequently used color space representation. 当三基色分量都为0 (最弱)时混合为黑色光;而当三基色分量都为k (最強)时混合为白色光。 When black light mixing three primary color components are 0 (weakest); and when the three primary color components are mixed when k (strongest) was obtained as a white light. 调整r、g、b三个系数的值,可以混合出介于黑色光和白色光之间的各种各样的色光。 Adjust the r, g, b values ​​of three coefficients, may be mixed between the various color light between the black light and white light.

[0023] 现有的RGB24位色彩表示法的图像方案下,采用的是定长表示方法,每个像素点至少要用24bit数据进行表示,如图3所示24位像素。 [0023] Existing RGB24 bit color image represented by the following scheme method, using the fixed-length representation, each pixel data is represented by use of at least 24bit, 3 pixels as shown in FIG. 24. 按照图2中的13行*16列的面积,则至少需要4992 (13*16*24) bit数据。 As an area in FIG. 2 * 13 rows 16 columns, then at least 4992 (13 * 16 * 24) bit data.

[0024] 増量混合压缩编码是ー种变长数据表示法,如图4所示,每个像素用2bit的标志位和可选的0-15bit的变长数据位进行表示。 [0024] The mixing amount of the enlargement of compression encoding is variable-length data types ー representation, as shown, and an optional flag 0-15bit the variable-length data bits for each pixel is represented by 4 2bit. 选择变长数据为15位的原因是相比24位色彩,15位色彩方式下缩减了数据量,但相比24位色彩方式图像不会大幅度的失真。 Select the variable-length data as compared to 15 because 24-bit color, reducing the amount of data under the 15 color mode, but compared to 24-bit color mode image is not greatly distorted. 15位表示ー个像素,这15位中的5位用于R,5位用于G,5位用于B,如图3所示15位像素。 15 represents ー pixels, which is 15 for R & lt five, five for G, B for 5, 15 as shown in FIG. 3 pixels. [0025] 除15位色彩外,还可以选择更小的如9位RGB (3+3+3)、12位RGB (4+4+4),或更大的如24位RGB (8+8+8)、18位(6+6+6)、21位(7+7+7)方式,但9位色彩只能表现512种颜色,图像失真严重;24位方式的信息量较15位方式増加了9位,且显示效果并没有明显的差异。 [0025] In addition to the 15-bit color, you may also be selected smaller, such as 9 RGB (3 + 3 + 3), 12 bit RGB (4 + 4 + 4), such as 24, or RGB (8 + 8 more +8), 18 (6 + 6 + 6), 21 (7 + 7 + 7) embodiment, but only nine color performance 512 kinds of colors, severe image distortion; information than 24 embodiment 15 embodiment to increase in the 9, and shows no significant difference in the effect.

[0026] 如图2所示情况下,増量混合压缩编码结果如图6所示。 In the case [0026] As shown in FIG 2, the amount of enlargement of hybrid compression coding results shown in Figure 6.

[0027] 从编码表可见,增量混合压缩编码后的数据大小是431 (13*16*2+15) bit。 [0027] can be seen from the code table, the size of data after compression encoding is a hybrid incremental 431 (13 * 16 * 2 + 15) bit.

[0028] 编码计算顺序如图5所示。 [0028] The coding sequence shown in Figure 5 is calculated. 获取变化区域后, 对变化的区域进行编码计算。 After obtaining the changed region, a region encoding a change calculation. 每个像素的计算法则是首先与当前帧的前行同列比较,相同则编码00,不同继续;与当前帧的同行前列比较,相同则编码01,不同继续;与前ー帧的同行同列比较,相同则编码10,不同编码11另加15位顔色数据。 Calculation rule for each pixel is first compared with the previous line of the current frame of the same column, the same as the encoding 00 different continue; compared with the counterparts in the forefront of the current frame, the same as the encoding 01 different continue; compared with the previous peer ー frame of the same column, 10 is the same as the coding, plus 15 different encoding 11 color data.

[0029] 下面举例详细说明一下编码的计算过程: [0029] The following examples explain in detail the process of calculating coding:

I由步骤ニ,增量范围是从第2行的第4列到第5行的第8列,则除2至5行外的每行每个像素编码为00 (无变化); I ni in step increments ranging from the first column 4, line 2 to column 8, line 5, in addition to the per-row line 2-5 of each pixel is encoded as 00 (no change);

2第2行第4列的像素编码00 (与当前帧的前行同列相同); Encoding the pixel of row 2 2 4 00 (the current frame and the preceding column with the same);

3第2行第5列的像素编码10 (与前ー帧的同行同列相同); Encoding the pixel of row 2 3 5 10 (peers before ー frame with the same column);

4第2行第6列的像素编码01 (与当前帧的同行前列相同); Encoding the pixel of row 2 01 4 6 (the same front of peers of the current frame);

5第3行第6列的像素编码11加15位顔色数据(不满足以上3种情况)。 5, the coding of the pixel row 311 6 + 15-bit color data (not satisfy the above three cases).

[0030] [0030]

步骤四,比较增量数据包与当前屏幕帧图像数据的大小,较小的传输到移动设备端。 Step four, the comparison with the current delta packet size screen frame image data transmitted to the mobile device smaller end. 在増量混合压缩编码情况下,増量混合压缩数据包大小会随着表示的图像变化面积的增大而増大。 In the enlargement of the amount of hybrid compression encoding case, enlargement of the amount of the compressed mixture increases as the packet size may change the image area represented by the enlargement of the big. 当表示的图像变化面积超过一定比例时,有可能出现增量数据包比屏幕帧图像数据还要大的情况,(如计算机切屏时,可能出现屏幕的完全变化),为优化传输,在传输数据包前,需要比较增量数据包与帧图像数据,传输较小者节省带宽。 When the area represented by the image change than a certain percentage, it is possible to increment a packet larger than the screen frame image data occurs, (e.g., when cutting the screen, the screen may appear completely change a computer), to optimize transmission, the transmission before the packet, a relatively delta packet frame image data, the smaller transmission bandwidth savings.

Claims (8)

1. 一种在计算机和移动设备间通过增量混合压缩编码进行屏幕传输的方法,其特征在于,包括: 步骤一,采集计算机屏幕数据,对采集到的屏幕数据进行图像编码形成屏幕帧图像数据; 步骤二,使用增量计算方法,将当前屏幕帧图像数据和前一屏幕帧图像数据进行增量计算,获取增量数据; 步骤三,将当前屏幕帧图像数据与增量数据进行混合压缩编码,获取增量数据包; 步骤四,比较增量数据包与当前屏幕帧图像数据的大小,较小的传输到移动设备端。 CLAIMS 1. A method of hybrid compression encoding delta-screen transfer between computers and mobile devices, characterized by comprising: a step, data acquisition computer screen, the collected data is a screen image encoding frame image data forming screen ; two step, incremental calculation method, the current screen and the previous frame image data of the screen frame image data increment calculation, incremental data acquisition; step three, the current screen frame image data and the incremental data compression-coded by mixing obtaining incremental data packet; Fourth Comparative delta packet size of the current frame image data step screen, the smaller end of the transmission to the mobile device.
2.如权利要求I所述的方法,其特征在于:所述步骤一中的图像编码方法是JPEG、JPEG2000、BMP、PNG等的一种或多种但不限于,较优的是选择硬件设备能够支持进行硬件编解码计算的,提高运算速度。 2. The method of claim I, wherein: said step of a method of encoding the image is a JPEG, JPEG2000, BMP, PNG, etc. but are not limited to one or more, more hardware is selected capable of supporting hardware codec calculated, improve processing speed.
3.如权利要求I所述的方法,其特征在于:所述步骤二中的增量计算方法是按照像素行的方式对屏幕帧图像数据进行分组,通过比较前一屏幕帧图像数据的对应分组数据是否相同,判断是否产生变化,所有变化的分组数据构成增量数据。 3. The method of claim I, wherein: the increment calculation method in step two are grouped image data for the screen frame pixel row manner, by a corresponding packet comparing the previous frame image data of the screen whether the data are identical, it is determined whether a change, and all changes which packet data constituting the incremental data.
4.如权利要求I所述的方法,其特征在于:所述步骤三中的混合压缩编码是按照像素行的方式对屏幕帧图像数据进行分组;以当前屏幕帧图像数据为基础;比较增量数据与当前屏幕帧图像数据进行混合编码;对增量数据中的全部像素进行压缩编码;压缩取样方法是比较每个像素点与其所在行的前一行的对应位置的像素点是否相同,比较每个像素点与其所在行的前一个像素点是否相同。 4. The method of claim I, wherein: in the step of mixing three compression-encoded are grouped image data for the screen frame pixel row manner; the current frame image data based on the screen; Comparative increment current screen data with hybrid coding frame image data; pixel increments for all data compression coding; position corresponding to a pixel of the previous row comparing each pixel in the row is the same as its compression method of sampling, comparing each pixel and its preceding pixel row are the same.
5.如权利要求I所述的方法,其特征在于:所述步骤二是为了减少方法计算数据量,增加方法的计算速度的优化步骤,该步骤可选。 5. The method of claim I, wherein: said reducing step two is to calculate the amount of data increases computation speed optimization step of the method, this step is optional.
6.如权利要求I所述的方法,其特征在于:所述步骤二、步骤四中的像素行方式分组是当前屏幕技术条件下较优的一种分组方式,也可采取像素列、像素块等方式进行分组实现。 6. The method of claim I, wherein: said step two, the pixel packet row manner Fourth step A packet superior way the current screen technical conditions, can also take the pixel column, the pixel block grouping realization mode.
7.如权利要求I所述的方法,其特征在于:所述步骤三中的混合压缩编码中,压缩取样方法是综合选用了比较每个像素点与其所在行的前一行的对应位置的像素点是否相同,t匕较每个像素点与其所在行的前一个像素点是否相同这两种取样方式,这两种取样方式是目前屏幕技术下较优的方法,但压缩取样方式不限于选用一种或两种或其他取样方式。 7. The method of claim I, wherein: the step of mixing the three compression encoding, the compression method is a comprehensive sampling of selected pixels corresponding to the row position before comparing each pixel of its row are the same, t dagger before a pixel representing each pixel in the row is the same as its two sampling method, the two samples is a method of the presently preferred screen technology, but the compression is not limited to choose one sample or two or other sampling method.
8.如权利要求I所示的方法,其特征在于:所述步骤三中的混合压缩编码中对像素点数据采用2bit标志加0-15bit变长数据的变长数据法进行表示,标志位长度和变长数据位长度的组合不限于此。 8. The method as claimed in claim I shown, wherein: the step of mixing the three compression flag indicates coding using variable length data 2bit fajitas 0-15bit variable length data of pixel data, flag bit length combinations and variable-length data bit length is not limited thereto.
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