WO2015167313A1 - 적응적 영상 데이터 압축 방법 및 장치 - Google Patents
적응적 영상 데이터 압축 방법 및 장치 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
- H04N19/139—Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods 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
- H04N19/177—Methods 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 group of pictures [GOP]
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods 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
- H04N19/182—Methods 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 pixel
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods 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
- H04N19/184—Methods 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 bits, e.g. of the compressed video stream
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- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/98—Adaptive-dynamic-range coding [ADRC]
Definitions
- the present invention relates to a method of setting a reproduction ratio and a compression ratio of an image displayed in an image processing apparatus.
- the technical problem to be solved by the present invention is to adaptively change the reproduction ratio and compression method of the displayed image data.
- the reproduction ratio and the compression scheme of the image data are adaptively changed based on the movement of the displayed image data.
- overall data traffic can be maintained at a predetermined level while maintaining a relatively good image quality by using human visual characteristics.
- FIG. 1 is a diagram for describing an image data processing apparatus according to an exemplary embodiment.
- FIG. 2 is a block diagram illustrating a configuration of an apparatus for adaptive image data compression, according to an exemplary embodiment.
- FIG. 3 is a flowchart illustrating an adaptive image data compression method according to an embodiment.
- FIG. 4 is a reference diagram for describing a reproduction ratio and a compression ratio applied to image data classified according to a degree of motion, according to an exemplary embodiment.
- FIG. 5 is a reference diagram for describing a lossless compression method according to an exemplary embodiment.
- FIG. 6 is a reference diagram for describing bit cutting, according to an exemplary embodiment.
- FIG. 7 is a reference diagram for explaining an image data compression method using a bit mapping method, according to an exemplary embodiment.
- FIG. 8 is a reference diagram for describing an image data compression method using a color index method, according to an exemplary embodiment.
- FIG. 9 is a reference diagram for explaining a method of determining motion information of image data, according to an exemplary embodiment.
- FIG. 10 is a diagram illustrating an image data transmission and reception system according to an embodiment.
- a method of compressing image data comprising: determining a reproduction ratio and a compression ratio of the image data based on motion information of the image data; And compressing and outputting the image data based on the determined reproduction ratio and compression ratio.
- an apparatus for compressing adaptive image data comprising: a compression ratio determiner configured to determine a reproduction ratio and a compression ratio of the image data based on motion information of the image data; And an image data compression unit configured to compress and output the image data based on the determined reproduction ratio and the compression ratio.
- any part of the specification is to “include” any component, this means that it may further include other components, except to exclude other components unless otherwise stated.
- the terms “... unit”, “module”, etc. described in the specification mean a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software. .
- an "application” refers to a set of computer programs designed to perform a particular task.
- the applications described herein may vary.
- the application includes a web browser, a camera application, a dictionary application, a translation application, a data transmission application, a music playback application, a video playback application, a message application, a social communicator application, a social media application, a map application, a photo management application, a broadcast application.
- Game applications exercise support applications, payment applications, memo applications, calendar applications, phone book applications and the like, but is not limited thereto.
- the image data processing apparatus 100 may be implemented in various forms.
- the image processing apparatus 100 described in the present specification may be a mobile phone, a smart phone, a laptop computer, a tablet PC, an e-book terminal, a digital broadcasting terminal, PDA (Personal Digital Assistants),
- PDA Personal Digital Assistants
- an image data processing apparatus 100 includes an application processor 110, a display unit 120, and a frame buffer 130.
- the application processor 110 receives the image data and decodes the image data to generate an image frame.
- the image data received by the application processor 110 may be image data compressed through various compression schemes such as MPEG-2, H.264 / AVC, and High Efficiency Video Codec (HEVC).
- the image data may be data stored in a memory device included in the image processing apparatus 100 separately from the frame buffer 130.
- the application processor 110 decodes the received image data and restores pixel values of the image frame.
- the decompressed frame 132 which is a restored original image frame, is stored in the frame buffer 130.
- the application processor 110 stores the compressed frame 131 in which the uncompressed frame 132 is compressed in the frame buffer 130.
- the frame buffer 130 is a memory device that temporarily stores information of an image frame displayed through the display 130.
- the image frame processed by the application processor 110 is stored in the frame buffer 130.
- the frame buffer 130 stores data of one image frame in pixel units. That is, the frame buffer 130 includes a plurality of memory units corresponding to each pixel represented by the display 130, and is displayed on the display 130 as image frame information stored in the frame buffer 130.
- the frame buffer 130 should have a storage space for storing at least one image frame.
- the application processor 110 and the display unit 120 are connected through a data bus, and the application processor 110 displays the compressed frame 131 or uncompressed frame 132 data stored in the frame buffer 130. To send).
- the display unit 120 includes a display panel such as a PDP, an LCD, an LED, a panel driver for driving the display panel, and an adaptive decoder 125 for decoding the compressed image data transmitted from the application processor 110.
- the image data output from the application processor 110 may include data of each pixel matching the X and Y coordinates of the display panel of the display 120, and the data of each pixel may include a plurality of color components.
- each pixel data may include a plurality of color components of red, green, and blue (RGB).
- RGB red, green, and blue
- each of R, G, and B has one byte, that is, 8 bits, and one pixel data of the uncompressed frame 132, which is the original image data, may have a total of 24 bits.
- the size of the original image data is generally large. Accordingly, the data rate may be limited in consideration of the bandwidth of the data bus between the application processor 110 and the display 120. In addition, even when the bandwidth of the data bus is sufficient, the data rate transmitted between the application processor 110 and the display 120 may be limited to prevent power consumption.
- the adaptive compressor 115 included in the application processor 110 adjusts a reproduction ratio and a compression ratio of the image data based on the motion information of the image data.
- the refresh rate means the number of image frames (frame / sec) output during one second.
- the compression ratio indicates (data size of compressed video frame / data size of original video frame). For example, a compression rate of 1 means that the original image data size is the same as the data size of the compressed image frame, and a compression ratio of 1/4 means that the size of the compressed image data is 1/4 the data size of the original image data. It means when having.
- the smaller the compression rate is the smaller the data size of the compressed image frame is than the data size of the original image frame. Therefore, the smaller the compression rate is, the more compression is performed on the image data.
- the compression ratio has a value from 0 to 1. The closer the value of the compression ratio is to 0, the higher the compression ratio. For example, a compression rate of 1/4 shows a higher compression rate than a compression rate of 1/2.
- the adaptive compressor 115 determines a reproduction ratio inversely proportional to the movement of the image data and a compression ratio proportional to the movement, and compresses the original image frame according to the determined reproduction ratio and the compression ratio. That is, the adaptive compressor 115 determines a relatively small playback rate and a relatively large compression rate as the motion of the image increases, and compresses the original video frame according to the determined playback rate and compression rate. If there is a lot of motion in the image, human vision is relatively insensitive to image quality. In addition, when there is little motion in the image, the human eye has a characteristic of easily recognizing a deterioration in image quality.
- the data rate has a value of (playback rate) * (data size of one frame). Therefore, it is possible to efficiently use the data band by compressing the image data in accordance with a reproduction ratio inversely proportional to the movement of the image data and a compression ratio proportional to the movement.
- the adaptive decoder 125 of the display unit 120 decodes and displays the compressed image data compressed and output by the adaptive compressor 115.
- FIG. 2 is a block diagram illustrating a configuration of an adaptive image data compression apparatus according to an embodiment
- FIG. 3 is a flowchart illustrating an adaptive image data compression method according to an embodiment.
- the adaptive image data compression apparatus 200 of FIG. 2 corresponds to the adaptive compression unit 115 of FIG. 1.
- step 310 the compression rate determiner 210 determines the reproduction ratio and the compression rate of the image data based on the motion information of the image data.
- the motion information of the image data may be determined in various ways.
- the compression rate determiner 210 may determine the motion information of the image based on the application type when the current image data is data related to the screen image that is executed by a predetermined application and output to the screen.
- the application type information may be received through index information indicating the currently executed application.
- the compression rate determiner 210 is configured to display current image data when the currently executed application mainly displays still or text-oriented data such as an internet browser, a text reader, an e-book reader, a still image viewer, an office program, or a word processor. It can be judged that the movement is small.
- the compression rate determiner 210 may determine that the current image data has intermediate motion when the currently executed application is an application that mainly displays data with a lot of motion, such as a video player. In addition, the compression rate determiner 210 may determine that the current movement of the image data is the most when the currently executed application is an application that frequently changes the screen, such as a game. The compression rate determiner 210 stages the motion degree according to the application type in advance, and may table and store the motion information in advance as illustrated in Table 1 below, and determine the motion information of the image data.
- the determination method of the movement level according to the application type may be changed.
- the image data is classified into three stages according to the degree of movement, so that the image data is classified into first image data having less movement, second image data having intermediate movement, and third image data having many movement.
- the explanation is centered.
- the image data is not limited thereto, and may be classified and classified according to the degree of movement.
- the compression rate determiner 210 may analyze the image data to determine the degree of motion. For example, the compression rate determiner 210 obtains a motion vector of blocks included in the input image frames for a predetermined time, generates a histogram for the motion information according to the size of the motion vector, and determines the size ratio of the motion vector. Therefore, the degree of motion included in the image data can be determined.
- the present invention is not limited to the above examples, and a method of determining the degree of motion included in the image data may be variously implemented.
- the compression rate determiner 210 determines a reproduction ratio and a compression rate to be applied to the classified image data. As described above, when the image data is classified into the first to third image data according to the degree of motion of the image data, the compression rate determining unit 210 displays the reproduction ratio and the compression rate applied to the classified image data in the following table. Can be determined as
- the compression rate determiner 210 determines the first compression ratio having the lowest first reproduction ratio and the smallest compression ratio for the first image data, and the intermediate reproduction ratio for the second image data.
- a second reproduction ratio having a second compression ratio and a second compression ratio having an intermediate compression ratio are determined, and a third compression ratio having the highest third reproduction ratio and the highest compression ratio is determined for the third image data.
- the compression rate determiner 210 may set the reproduction ratio in inverse proportion to the movement of the image data, and the compression ratio is proportional to the movement of the image data.
- the image data compressor 220 compresses the image data according to the determined reproduction ratio and the compression ratio.
- FIG. 4 is a reference diagram for describing a reproduction ratio and a compression ratio applied to image data classified according to a degree of motion, according to an exemplary embodiment.
- the image data compressor 220 compresses the image data according to the determined reproduction ratio and the compression ratio.
- the image data is the first image data having the smallest movement, and the reproduction ratio applied to the first image data is 10 Hz and the compression ratio is 1, the image data compressor 220 losslessly compresses the original image frame and losslessly compresses the image.
- the frames 410 are output at a reproduction rate of 10 Hz.
- the data compressor 220 may drop 60 original videos through frame dropping.
- Only 10 image frames of the frames may be sampled, and the sampled 10 image frames may be compressed and output through a lossless compression method.
- a lossless compression method various methods may be applied.
- the sampled image frame may be lossless compressed by applying a differential pulse code modulation (DPCM) method.
- DPCM differential pulse code modulation
- the image data compressor 220 may adjust the original image frame at 1/4 ratio.
- the compressed and compressed image frames 420 are output at a reproduction ratio of 30 Hz.
- the data compression unit 220 samples only 30 image frames of 60 original image frames through frame dropping, and compresses each of the 30 sampled image frames at a 1/4 ratio. That is, the data compression unit 220 compresses the data size of each of the 30 sampled image frames to have a size 1/4 of the original image frame.
- the compression method may be implemented through various methods such as bit cutting, bit mapping, and color indexing, which will be described later.
- the image data compression unit 220 converts the received original image frame by 1/8 ratio.
- the compressed video frames 430 are output at a reproduction rate of 60 Hz.
- the frame rate of the original video frame is 60 Hz
- the frame rate of the original video frame and the determined reproduction ratio are the same.
- the original video frame may be used as it is without dropping the original video frame.
- the frame rate of the compressed image data may be adjusted through frame interpolation or upsampling.
- the image data compression unit 220 interpolates the original video frame to interpolate the image at 120 Hz.
- a frame is generated, and each image frame is compressed and output according to the determined compression ratio.
- the compression method may be implemented through various methods such as bit cutting, bit mapping, and color indexing, which will be described later.
- FIG. 5 is a reference diagram for describing a lossless compression method according to an exemplary embodiment.
- the image data compressor 220 may reduce the reproduction ratio of the image data and reduce the compression ratio. For example, when the motion of the image data is small, the image data may be lossless compressed instead of being output at a relatively small reproduction ratio.
- the DPCM scheme is shown in FIG. 5 as a lossless compression scheme.
- the DPCM method calculates a difference value between pixel value differences constituting each image frame in a row or column direction, and transmits the difference value instead of the pixel value of the original pixel.
- the image data compressor 220 calculates a pixel value difference between adjacent pixels included in an image frame that is losslessly compressed.
- the image data compression unit 220 may use the difference value P (1,0) from the pixel value P (0,0) on the left instead of the pixel value P (1,0) included in the original frame 510.
- -P (0,0) is calculated and used as the information of the pixel value P (1,0).
- the pixel value of P (0,0) as a reference is used as it is.
- the pixel value P (1,0) can be restored by adding P (0,0) and the difference values (P (1,0) -P (0,0)).
- the image data compressor 220 may generate a lossless compressed frame 520 through a DPCM using difference values between adjacent pixels.
- FIG. 6 is a reference diagram for describing bit cutting, according to an exemplary embodiment.
- the image data compressor 220 may perform compression by bit truncation that reduces the number of bits of each pixel of the original image data. It is assumed that one pixel data of the original image data is composed of 8 bits for each of RGB888, that is, R, G, and B color components, and has a total data size of 24 bits.
- the image data compression unit 220 cuts the bits of one pixel of the original image data to have RGB565, that is, 5 bits for the R color component, 6 bits for the G color component, and 5 bits for the B color component. This 24-bit data size can be compressed to 16 bits. In this case the compression ratio is (16/24), i.e. 2/3.
- binary values of one color component of one pixel are composed of eight bits of b1 to b8 610, b1 is a Most Significant Bit (MSB), and b8 is a LSB (Least).
- MSB Most Significant Bit
- b8 is a LSB (Least).
- the image data compressor 220 cuts a predetermined number of bits 620 from the LSB according to the determined compression ratio, and outputs only 6 bits except the cut bits 620, thereby compressing 8 bits of data into 6 bits.
- the decoding side receiving the truncated image data may perform decoding by inserting 0 into the truncated binary value portion. The number of bits to be truncated may be determined according to the compression rate.
- the compression ratio is 1 / M (M is an integer)
- the total number of bits of one pixel of the original image data is T (T is an integer)
- the number of bits to be truncated is N (N is an integer).
- the number of bits to be cut in each color component may be determined based on the determined number of cutting bits N.
- FIG. As described in the above example, when a total of 8 bits are to be cut by compressing 24 bits of pixel data into 16 bits, 3 bits in an R color component, 2 bits in a G color component, and 2 bits in a B color component may be set.
- FIG. 7 is a reference diagram for explaining an image data compression method using a bit mapping method, according to an exemplary embodiment.
- the image data compressor 220 may compress the image data through a bit mapping scheme instead of the bit truncation scheme. For example, when one pixel of the original image frame is represented through 8 bits, one pixel has one of 256 color components of 0 to 255 in total. If 8-bit pixels are compressed to 6-bit, 64 color components can be expressed through 6-bit pixel values. The image data compressor 220 maps the color component 715 of the current pixel of the original image frame represented by 8-bit to one color component 725 of the color components that can be expressed in 6-bit, and corresponds to the mapped color component 725. Image data can be compressed by outputting a value of 6 bits.
- FIG. 8 is a reference diagram for describing an image data compression method using a color index method, according to an exemplary embodiment.
- the image data compression unit 220 determines the representable colors using the determined number of bits and indicates an index corresponding to the color of each pixel.
- Image data can be compressed by outputting a binary value.
- the number of bits available for representing one pixel of the compressed image data according to the compression rate is n (n is an integer). Except for the case where the compression ratio is 1, n must be smaller than the number of bits of one pixel of the original image frame. 2 ⁇ n colors that can be represented using n bits are called C1 to C (2 ⁇ n), respectively.
- the image data compressor 220 determines a color closest to the color of the current pixel among 2 ⁇ n colors, and outputs an n-bit color index indicating the determined color.
- the image data compression unit 220 constructs a color palette including 2 ⁇ n colors, and outputs the image data by outputting n-bit index information representing one color included in the color palette. It can be compressed.
- the image data compressor 220 compresses the original image frame according to the compression rate determined using the aforementioned various compression methods.
- the image data compressor 220 may perform lossless compression by applying DPCM to the first image data having small movement.
- the image data compression unit 220 cuts the bits of at least one binary value among the plurality of color components constituting each pixel with respect to the second image data having the intermediate motion, so that the total number of bits is included in the pixels of the original image frame. Compression can be performed by making it smaller than the number of bits. That is, the original image data is composed of three color components, and the binary values of each of the three color components of one pixel of the original image data are A, B, and C (A, B, and C are integers), respectively.
- the image data compression unit 220 cuts the bits of at least one binary value of A, B, and C to the second image data. Compression can be performed by making the total number of bits m (m is an integer) of one pixel of M less than M.
- the image data compressor 220 may compress the third image data having the most movement by using a color indexing method using a color palette. That is, the image data compression unit 220 maps the color of the original image data to one of 2 ⁇ n colors that can be represented by the number n of bits smaller than m (n is an integer), and outputs the color index value composed of n bits.
- the third image data can be compressed.
- FIG. 9 is a reference diagram for explaining a method of determining motion information of image data, according to an exemplary embodiment.
- the compression rate determiner 210 may determine the motion information of the image data based on the type of the application displaying the image data. However, a case where a plurality of applications are simultaneously displayed on the screen image 900 may occur. For example, different types of first and second applications 910 and 920 may be displayed on the screen image 900 as shown in FIG. 9. As described above, when the plurality of applications 910 and 920 are to be displayed on the screen image 900, the compression rate determiner 210 may determine the compression rate based on the most moving application among the plurality of applications.
- the compression rate determining unit 210 may determine the overall size based on the motion information of the second application with much movement.
- the screen image 900 may be determined as an image having a lot of movement.
- FIG. 10 is a diagram illustrating an image data transmission and reception system according to an embodiment.
- an image data transmission / reception system may include a transmission device for transmitting image data and a reception device for receiving and displaying image data.
- a transmitting device for transmitting image data is referred to as a first device 1010 and a device for receiving and displaying image data is referred to as a second device 1020.
- the first device 1010 may include at least one communication module for communicating with the second device 1020.
- the first device 1010 may include a mobile communication module (eg, 3G, 4G, 5G, etc.), a short range communication module (eg, a Bluetooth communication module, a Bluetooth Low Energy (BLE) communication module, a Wi-Fi communication module, a Zigbee). (Zigbee) communication module, infrared data association (IrDA) communication module, Wi-Fi Direct (WFD) communication module, ultra wideband (UWB) communication module, Ant + communication module, etc.), and home network communication module.
- a mobile communication module eg, 3G, 4G, 5G, etc.
- a short range communication module eg, a Bluetooth communication module, a Bluetooth Low Energy (BLE) communication module, a Wi-Fi communication module, a Zigbee.
- Zigbee Zigbee
- IrDA infrared data association
- WFD Wi-Fi Direct
- the first device 1010 may be implemented in various forms.
- the first device 1010 described in the present specification may be a mobile phone, a smart phone, a laptop computer, a tablet PC, an e-book device, a digital broadcasting terminal, a personal digital assistant (PDA),
- PDA personal digital assistant
- PMP portable multimedia player
- MP3 player a navigation device
- MP3 player a digital camera
- wearable device eg, glasses, a wrist watch
- the second device 1020 may include at least one communication module for receiving image data transmitted from the first device 1010.
- the second device 1020 may include a mobile communication module (eg, 3G, 4G, 5G, etc.), a short range communication module (eg, a Bluetooth communication module, a Bluetooth Low Energy (BLE) communication module, a Wi-Fi communication module, a Zigbee). (Zigbee) communication module, infrared data association (IrDA) communication module, Wi-Fi Direct (WFD) communication module, ultra wideband (UWB) communication module, Ant + communication module, etc.), and home network communication module.
- a mobile communication module eg, 3G, 4G, 5G, etc.
- a short range communication module eg, a Bluetooth communication module, a Bluetooth Low Energy (BLE) communication module, a Wi-Fi communication module, a Zigbee.
- Zigbee Zigbee
- IrDA infrared data association
- WFD Wi-Fi Direct
- the second device 1020 may be various types of devices having a display function.
- the second device 1020 may be a mobile phone, a smart phone, a laptop computer, a tablet PC, an e-book device, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP). ), Audio devices, navigation, MP3 players, digital cameras, smart TVs, glasses, wristwatches, home sinks, refrigerators having a communication function, air conditioners, water purifiers, and the like, but is not limited thereto.
- PDA personal digital assistant
- PMP portable multimedia player
- the first device 1010 may perform a function similar to the image data compression apparatus 200 of FIG. 2. That is, the adaptive compression unit 1015 of the first device 1010 determines the reproduction ratio and the compression ratio based on the motion information of the input image data in the same manner as the image data compression apparatus 200 of FIG. 2, and determines the determined reproduction ratio. And compress the image data according to the compression rate, and output the compressed image data to the second device 1020 through the communication module.
- the adaptive decoder 1025 of the second device 1020 decodes the compressed image data.
- Method according to an embodiment of the present invention is implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium.
- the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
- Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.
- Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
- Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
Abstract
Description
움직임 레벨 | 해당 어플리케이션 |
제 1 움직임(움직임 없음) | 인터넷 브라우저, 텍스트 리더기, 이북 리더기, 정지영상 뷰어, 오피스 프로그램, 워드 프로세서 |
제 2 움직임(중간 움직임) | 동영상 플레이어, 동영상이 포함된 인터넷 브라우저 |
제 3 움직임(움직임 큼) | 게임 |
재생 비율 | 압축률 | |
제 1 영상 데이터 | 10Hz | 1 |
제 2 영상 데이터 | 30Hz | 1/4 |
제 3 영상 데이터 | 60Hz | 1/8 |
Claims (15)
- 적응적 영상 데이터 압축 방법에 있어서,영상 데이터의 움직임 정보에 기초하여, 상기 영상 데이터의 재생 비율 및 압축률을 결정하는 단계; 및상기 결정된 재생 비율 및 압축률에 기초하여 상기 영상 데이터를 압축하여 출력하는 단계를 포함하는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 1항에 있어서,상기 결정하는 단계는상기 영상 데이터의 움직임에 따라서, 상기 영상 데이터의 움직임에 반비례하는 재생 비율과 상기 움직임에 비례하는 압축률을 결정하는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 1항에 있어서,상기 결정하는 단계는상기 영상 데이터의 움직임 정보에 기초하여, 상기 영상 데이터를 움직임이 적은 제 1 영상 데이터, 중간 움직임을 갖는 제 2 영상 데이터 및 움직임이 많은 제 3 영상 데이터로 분류하는 단계; 및상기 분류된 영상 데이터들 중 제 1 영상 데이터에 대해서는 가장 낮은 제 1 재생 비율 및 가장 작은 압축률을 갖는 제 1 압축률을 결정하며, 제 2 영상 데이터에 대해서는 중간의 재생 비율을 갖는 제 2 재생 비율 및 중간 압축률을 갖는 제 2 압축률을 결정하고, 제 3 영상 데이터에 대해서는 가장 높은 제 3 재생 비율 및 가장 높은 압축률을 갖는 제 3 압축률을 결정하는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 3항에 있어서,상기 제 1 영상 데이터는 무손실 압축 방식을 통해 압축되며, 상기 제 2 영상 데이터는 원영상 데이터의 하나의 픽셀이 갖는 비트수를 감소시키는 비트 절단에 의하여 압축되며, 상기 제 3 영상 데이터는 컬러 인덱스 테이블에 의하여 압축되는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 4항에 있어서,상기 원영상 데이터는 3개의 컬러 성분으로 구성되며, 상기 원영상 데이터의 하나의 픽셀이 갖는 3개의 컬러 성분 각각의 이진값은 각각 A, B, C(A, B, C는 정수)이며, 상기 하나의 픽셀의 3개의 컬러 성분 전체의 비트수를 M(M은 정수)이라고 할 때, 상기 제 2 영상 데이터는 상기 A, B, C 중 적어도 하나의 이진값의 비트를 절단하여 상기 제 2 영상 데이터의 하나의 픽셀의 갖는 전체 비트수 m(m은 정수)이 상기 M보다 작도록 압축되며,상기 제 3 영상 데이터는 상기 m보다 작은 비트수 n(n은 정수)으로 표현가능한 2^n개의 컬러들 중 하나로 상기 원영상 데이터의 컬러를 매핑시키고, 상기 n개의 비트로 이루어진 컬러 인덱스값으로 출력됨으로써 압축되는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 1항에 있어서,상기 영상 데이터는 어플리케이션에 의하여 실행되어 스크린에 출력되는 스크린 영상이며, 상기 영상 데이터의 움직임 정보는 상기 어플리케이션의 유형에 기초하여 결정되는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 6항에 있어서,상기 어플리케이션 유형은 정지 영상, 텍스트 및 동영상 중 상기 어플리케이션 실행시 주로 출력되는 영상 데이터의 유형에 따라서 움직임이 적은 제 1 어플리케이션, 중간 움직임을 갖는 제 2 어플리케이션 및 움직임이 많은 제 3 어플리케이션으로 분류되는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 제 6항에 있어서,상기 스크린에 출력되는 스크린 영상에 복수 개의 어플리케이션이 포함된 경우, 상기 복수 개의 어플리케이션들 중 가장 움직임이 많은 어플리케이션에 기초하여 압축률을 결정하는 것을 특징으로 하는 적응적 영상 데이터 압축 방법.
- 적응적 영상 데이터 압축 장치에 있어서,영상 데이터의 움직임 정보에 기초하여, 상기 영상 데이터의 재생 비율 및 압축률을 결정하는 압축률 결정부; 및상기 결정된 재생 비율 및 압축률에 기초하여 상기 영상 데이터를 압축하여 출력하는 영상 데이터 압축부를 포함하는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 9항에 있어서,상기 압축률 결정부는상기 영상 데이터의 움직임에 따라서, 상기 영상 데이터의 움직임에 반비례하는 재생 비율과 상기 움직임에 비례하는 압축률을 결정하는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 9항에 있어서,상기 압축률 결정부는상기 영상 데이터의 움직임 정보에 기초하여, 상기 영상 데이터를 움직임이 적은 제 1 영상 데이터, 중간 움직임을 갖는 제 2 영상 데이터 및 움직임이 많은 제 3 영상 데이터로 분류하고, 상기 분류된 영상 데이터들 중 제 1 영상 데이터에 대해서는 가장 낮은 제 1 재생 비율 및 가장 작은 압축률을 갖는 제 1 압축률을 결정하며, 제 2 영상 데이터에 대해서는 중간의 재생 비율을 갖는 제 2 재생 비율 및 중간 압축률을 갖는 제 2 압축률을 결정하고, 제 3 영상 데이터에 대해서는 가장 높은 제 3 재생 비율 및 가장 높은 압축률을 갖는 제 3 압축률을 결정하는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 11항에 있어서,상기 제 1 영상 데이터는 무손실 압축 방식을 통해 압축되며, 상기 제 2 영상 데이터는 원영상 데이터의 하나의 픽셀이 갖는 비트수를 감소시키는 비트 절단에 의하여 압축되며, 상기 제 3 영상 데이터는 컬러 인덱스 테이블에 의하여 압축되는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 12항에 있어서,상기 원영상 데이터는 3개의 컬러 성분으로 구성되며, 상기 원영상 데이터의 하나의 픽셀이 갖는 3개의 컬러 성분 각각의 이진값은 각각 A, B, C(A, B, C는 정수)이며, 상기 하나의 픽셀의 3개의 컬러 성분 전체의 비트수를 M(M은 정수)이라고 할 때, 상기 제 2 영상 데이터는 상기 A, B, C 중 적어도 하나의 이진값의 비트를 절단하여 상기 제 2 영상 데이터의 하나의 픽셀의 갖는 전체 비트수 m(m은 정수)이 상기 M보다 작도록 압축되며,상기 제 3 영상 데이터는 상기 m보다 작은 비트수 n(n은 정수)으로 표현가능한 2^n개의 컬러들 중 하나로 상기 원영상 데이터의 컬러를 매핑시키고, 상기 n개의 비트로 이루어진 컬러 인덱스값으로 출력됨으로써 압축되는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 9항에 있어서,상기 영상 데이터는 어플리케이션에 의하여 실행되어 스크린에 출력되는 스크린 영상이며, 상기 영상 데이터의 움직임 정보는 상기 어플리케이션의 유형에 기초하여 결정되는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
- 제 14항에 있어서,상기 어플리케이션 유형은 정지 영상, 텍스트 및 동영상 중 상기 어플리케이션 실행시 주로 출력되는 영상 데이터의 유형에 따라서 움직임이 적은 제 1 어플리케이션, 중간 움직임을 갖는 제 2 어플리케이션 및 움직임이 많은 제 3 어플리케이션으로 분류되는 것을 특징으로 하는 적응적 영상 데이터 압축 장치.
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KR102444054B1 (ko) * | 2017-09-14 | 2022-09-19 | 삼성전자주식회사 | 영상 처리 장치, 영상 처리 방법 및 컴퓨터 판독가능 기록 매체 |
CN110446041B (zh) * | 2018-05-02 | 2021-11-19 | 中兴通讯股份有限公司 | 一种视频编解码方法、装置、系统及存储介质 |
CN109754443B (zh) * | 2019-01-30 | 2021-04-20 | 京东方科技集团股份有限公司 | 图像数据转化方法、装置及存储介质 |
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2015
- 2015-05-01 JP JP2016563810A patent/JP6412953B2/ja not_active Expired - Fee Related
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- 2015-05-01 WO PCT/KR2015/004457 patent/WO2015167313A1/ko active Application Filing
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KR20030018042A (ko) * | 2001-05-10 | 2003-03-04 | 소니 가부시끼 가이샤 | 동화상 부호화 장치 |
KR20070090165A (ko) * | 2004-11-15 | 2007-09-05 | 스미스 마이크로 소프트웨어, 인코포레이티드 | 디지털 이미지의 무손실 압축을 위한 시스템 및 방법 |
KR20060109828A (ko) * | 2005-04-18 | 2006-10-23 | 소니 가부시끼 가이샤 | 화상 신호 처리 장치, 카메라 시스템, 및 화상 신호 처리방법 |
JP2011050104A (ja) * | 2010-11-12 | 2011-03-10 | Hitachi Ltd | 符号化映像信号変換方法及び装置 |
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
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US10757416B2 (en) | 2020-08-25 |
EP3116228A4 (en) | 2017-10-18 |
KR20150126221A (ko) | 2015-11-11 |
JP6412953B2 (ja) | 2018-10-24 |
JP2017517940A (ja) | 2017-06-29 |
CN106256126B (zh) | 2020-04-14 |
US20170054984A1 (en) | 2017-02-23 |
EP3116228B1 (en) | 2020-10-07 |
KR101599888B1 (ko) | 2016-03-04 |
CN106256126A (zh) | 2016-12-21 |
EP3116228A1 (en) | 2017-01-11 |
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