WO2016192055A1 - Image coding method and apparatus using prediction information and image processing device - Google Patents

Abstract

An image coding method and apparatus using prediction information and an image processing device. The image coding method comprises: determining that an image region to be coded uses first prediction information or second prediction information, wherein the first prediction information is formed on the basis of pixel information about a plurality of coded image regions, and the second prediction information is formed on the basis of the pixel information about the coded image regions adjacent to the image region to be coded; and using corresponding prediction information to perform bit stream coding on various pixels of the image region to be coded. Thus, not only can the prediction efficiency of a predictor be improved, but the bit costs for coding can be further reduced.

Description

Image coding method, apparatus and image processing apparatus using prediction information Technical field

The present invention relates to the field of graphic image technology, and in particular, to an image encoding method and apparatus using prediction information, and an image processing apparatus.

Background technique

Palette-based coding is widely used in graphic image technology (especially video coding technology). In the encoding process, for the image area to be encoded, for example, a coding unit (CU), including a plurality of pixels having color values (for example, RGB mode, having 24 bits of true color); in order to reduce the storage bits The storage capacity of the image image, which can usually point the pixel to the data index of the palette. During the decoding process, the color value of each output pixel can be determined by looking up a palette with a corresponding data index.

The palette is a set of pixel values. For pixels whose pixel values are in the palette, only the pixel index corresponding to the pixel value in the palette is used. Thereby, only the palette and the index corresponding to the pixels in the coding unit can be bit-stream encoded, and the bit cost of the coding can be reduced.

In order to further reduce the bit cost, it is currently possible to predict each pixel of the coded image region using a predictor, wherein the predictor can be stuffed based on each pixel information of the encoded image region; for example, the predictor can include 128 Forecast items.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

However, the inventors have found that the currently used predictor is formed based on pixel information of all coded image regions, and there is a problem that the correlation between the image region to be encoded and the predictor is not high, resulting in a low prediction efficiency of the predictor; At present, the number of items in the predictor is large, and the cost of performing bit stream encoding is relatively large, and the bit cost of encoding cannot be further reduced.

Embodiments of the present invention provide an image encoding method and apparatus using prediction information, and an image processing apparatus. The bit cost of the encoding is further reduced while improving the predictive efficiency of the predictor.

According to a first aspect of the embodiments of the present invention, there is provided an image encoding method using prediction information, the image encoding method comprising:

Determining whether the image region to be encoded uses first prediction information or second prediction information; wherein the first prediction information is formed based on pixel information of a plurality of encoded image regions, the second prediction information being based on the image region to be encoded Formed by pixel information of adjacent coded image regions;

Each pixel of the image to be encoded region is bitstream encoded using corresponding prediction information.

According to a second aspect of the embodiments of the present invention, there is provided an image encoding apparatus using prediction information, the image encoding apparatus comprising:

The information determining unit determines whether the image region to be encoded uses the first prediction information or the second prediction information; wherein the first prediction information is formed based on pixel information of the plurality of encoded image regions, the second prediction information is based on Forming pixel information of an encoded image region adjacent to an image region to be encoded;

The bit stream encoding unit performs bit stream encoding on each pixel of the image area to be encoded using corresponding prediction information.

According to a third aspect of the embodiments of the present invention, an image processing apparatus is provided, including:

An encoding device that determines whether the image region to be encoded uses first prediction information or second prediction information; wherein the first prediction information is formed based on pixel information of a plurality of encoded image regions, the second prediction information being based on the Forming pixel information of the encoded image region adjacent to the image region; and performing bitstream encoding on each pixel of the image region to be encoded using the corresponding prediction information;

and / or

Decoding means, determining whether the image region to be decoded uses third prediction information or fourth prediction information; wherein the third prediction information is formed based on pixel information of the plurality of decoded image regions, the fourth prediction information being based on the Forming pixel information of decoded image regions adjacent to the image region; and performing bitstream decoding on each pixel of the image region to be decoded using corresponding prediction information.

According to still another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when the program is executed in an image processing apparatus, the program causes a computer to perform image encoding as described above in the image processing apparatus method.

According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program is provided, Wherein the computer readable program causes a computer to perform an image encoding method as described above in an image processing apparatus.

The beneficial effects of the embodiment of the present invention are: determining whether the image region to be encoded uses the first prediction information or the second prediction information, and performing bitstream encoding on each pixel of the image region to be encoded using the corresponding prediction information; A prediction information is formed based on pixel information of a plurality of encoded image regions, the second prediction information being formed based on pixel information of the encoded image region adjacent to the image region to be encoded. Thereby, not only the prediction efficiency of the predictor can be improved, but also the bit cost of the encoding can be further reduced.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprises"

DRAWINGS

Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. In order to facilitate the illustration and description of some parts of the invention, the corresponding parts in the figures may be enlarged or reduced.

Elements and features described in one of the figures or one embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

1 is a schematic diagram of an example of a coding unit according to an embodiment of the present invention;

2 is a schematic diagram of a coded image area according to an embodiment of the present invention;

3 is a schematic flow chart of an image encoding method using measurement information according to Embodiment 1 of the present invention;

4 is another schematic flowchart of an image encoding method using prediction information according to Embodiment 1 of the present invention;

Figure 5 is a schematic diagram of an image encoding apparatus using prediction information according to Embodiment 2 of the present invention;

6 is a schematic diagram of an image decoding method using prediction information according to Embodiment 3 of the present invention;

7 is another schematic diagram of an image decoding method using prediction information according to Embodiment 3 of the present invention;

8 is a schematic diagram of an image decoding apparatus using prediction information according to Embodiment 4 of the present invention;

Figure 9 is a block diagram showing the configuration of an image processing apparatus according to a fifth embodiment of the present invention.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

1 is a schematic diagram showing an example of a coding unit according to an embodiment of the present invention, showing a case of a coding unit (CU). As shown in FIG. 1, the coding unit has 8 × 8 pixels; pixels having the same pixel value use the same symbol to represent pixel values, such as C0, C1, ..., C8.

In this embodiment, the prediction table is used to predict the current CU's palette table. If the prediction table is relatively large (for example, there are 128 items), the prediction flag used to indicate whether the prediction table is used or not is more; in addition, the prediction Each item in the table may be far away from the image area to be encoded and the correlation is not high, resulting in low efficiency of prediction.

2 is a schematic diagram of a coded image region in accordance with an embodiment of the present invention. As shown in FIG. 2, the entire area to be encoded may be composed of a plurality of Largest Coding Units (LCUs), each of which is, for example, 64*64 pixels; wherein each LCU may include multiple CUs, each The CU is, for example, 8*8 pixels. Since the items in the current prediction table are formed based on the pixel information of all coded image regions, for the CU to be encoded (for example, B in FIG. 2), the value in the predictor may be the last one of the previous LCU line (LCU line). The pixel values in the LCU are far apart in space and correlated with B, resulting in low prediction efficiency.

The embodiments of the present invention are described in detail below.

Example 1

An embodiment of the present invention provides an image encoding method using prediction information, and FIG. 3 is a schematic flowchart of an image encoding method using measurement information according to an embodiment of the present invention. As shown in FIG. 3, the image encoding method includes:

Step 301: Determine whether the image region to be encoded uses first prediction information or second prediction information; wherein the first prediction information is formed based on pixel information of a plurality of encoded image regions, and the second prediction information is based on Forming pixel information of the encoded image region adjacent to the image region to be encoded;

Step 302: Perform bitstream encoding on each pixel of the image to be encoded region by using corresponding prediction information.

In this embodiment, the image to be encoded area may be a current coding unit (CU) or a current maximum coding unit. The following uses CU as an example for description. The embodiment of the present invention is applicable to the case of adopting the palette mode, and the embodiment of the present invention is equally applicable to the case of mixing the palette mode and the non-palette mode (for example, the ease mode). For information on how to determine the pixels in the palette mode and how to determine the pixels in the non-palette mode, you can refer to any of the related methods.

In this embodiment, two prediction information tables can be generated and maintained. The first prediction information is formed based on pixel information of a plurality of encoded image regions, and the second prediction information is formed based on pixel information of an encoded image region (eg, Left CU) adjacent to the image region to be encoded.

Table 1 shows a prediction table of an embodiment of the present invention. As shown in Table 1, the prediction table may have, for example, 8 prediction items, each prediction item being identified by one prediction index (for example, 0, 1, ..., 7; each prediction index may be represented by 3 bits), and Each prediction term represents a pixel value.

Table 1

Predictive index	0	1	2	3	4	......	......	7
									Pixel values	C9	C6	C0	C12	C8	......	......	C14

Regarding the first prediction information, each prediction item may include a plurality of color components. For example, the color component may include: a y component, a Cb component, and a Cr component; or the color component may include: an R component, a G component, or a B component. However, the invention is not limited thereto, and for example, other color components may also be used.

The following is an example of yCbCr.

Table 2 is a practical example of the prediction table of the embodiment of the present invention, showing the first prediction information of the embodiment of the present invention. As shown in Table 2, the prediction table may have, for example, 128 prediction items, each prediction item being identified by a prediction index (for example, 0, 1, ..., 127; each may be represented by 7 bits), and each The prediction term represents a pixel value that includes a plurality of color components (eg, yCbCr).

Table 2

Predictive index	0	1	2	3	4	......	......	127
									y	118	120	122	112	218	......	......	222
Cb	50	50	78	117	118	......	......	133
									Cr	58	59	63	78	125	......	......	124

In the present embodiment, the first prediction information may be generated in advance, for example, predefined on the encoding device side based on empirical values; and also pre-defined on the decoding device side. Thereby, both the encoding side and the decoding side can know the first prediction information in advance, and the prediction information does not need to be encoded by the bit stream. And, the prediction information can also be updated based on the encoded pixel information. For example, the latest encoded pixel information can be added to the prediction table; and the same operation can be performed on the decoding side to generate the same prediction information as the encoding side, and the prediction information is also not encoded by the bit stream.

In the present embodiment, the second prediction information may also be formed based on pixel information of a left image region (eg, Left CU) or an upper image region (eg, Above CU) adjacent to the image region to be encoded. The number of items in the first prediction information (for example, 128) is more than the number of items in the second prediction information (for example, generally does not exceed 64).

For example, when encoding the current CU (ie, B) as shown in FIG. 2, second prediction information formed by each pixel information in the Left CU (ie, A) may be used.

It is to be noted that the coded image area adjacent to the image to be coded in the embodiment of the present invention may be the left CU of the current CU (ie, the Left CU), and the embodiment of the present invention is not limited thereto. The following is only an example of the Left CU.

In this embodiment, the second prediction information may also be generated in advance (ie, generated before the current CU performs encoding), and updated based on the encoded pixel information. The specific form of the second prediction information can be similar to the information shown in Table 2. Furthermore, as with the first prediction information, the second prediction information does not need to be encoded by the bit stream.

In this embodiment, since the left image area is close to the image area to be encoded, the correlation between the two is relatively high; and the number of pixels in the left image area is small, for example, the Left CU is generally 8*. With 8 pixels, the number of items of the second prediction information formed is also small (for example, generally no more than 64), so the number of bits that need to be encoded is small.

It is to be noted that the first prediction information and the second prediction information of the present invention are only schematically illustrated above, but the present invention is not limited thereto, and a specific implementation manner may be determined according to actual conditions. For example, the size of the prediction information and the specific content can be determined as needed.

FIG. 4 is another schematic flowchart of an image encoding method using prediction information according to an embodiment of the present invention. As shown in FIG. 4, the image encoding method includes:

Step 401, it is determined whether the image area to be encoded has a left image area; in the case of having a left image area, step 402 is performed; if there is no left image area, step 404 is performed;

In this embodiment, for example, whether the current CU has a Left CU can be determined by determining the CU_pelX value. For example, in the case where the value of CU_PelX is greater than 0, it may be determined that there is a Left CU; otherwise, it may be determined that the current CU is the first CU of a certain LCU line without the Left CU.

Wherein, in a case where the image area to be encoded does not have the left image area, it is determined that the first prediction information is used and the bit stream encoding may not be performed on the identifier bit.

Step 402, determining whether the image area to be encoded uses second prediction information; performing step 405 in the case of using the second prediction information; performing step 403 in the case of not using the second prediction information;

In this embodiment, it is possible to determine whether to use the first prediction information or the second prediction information when encoding the image region to be encoded. The first prediction information is formed based on pixel information of a plurality of encoded image regions, and the second prediction information is formed based on pixel information of a left image region adjacent to the image region to be encoded.

For example, after the coded image region is scanned, the cost values of the first prediction information and the second prediction information are separately calculated, and the prediction information corresponding to the use of the smaller generation value is determined. Alternatively, it is also possible to preset a certain determination condition, and determine whether to use the first prediction information or the second prediction information according to the condition. How to determine specifically can be determined according to actual scenarios, and the present invention does not limit this.

Step 403: Perform bitstream coding to identify the identifier bit that uses the first prediction information.

In this embodiment, whether the first prediction information or the second prediction information is used may be identified by one identification bit (eg, using LeftCUPredFlag). In the case where the first prediction information is used, 0 bit stream coding is performed, and when the second prediction information is used, 1 bit stream coding is performed. However, the present invention is not limited thereto. For example, when the first prediction information is used, 1 bit stream coding may be performed, and when the second prediction information is used, 0 bit stream coding may be performed.

Step 404: Perform bitstream encoding on each pixel of the image to be encoded region by using first prediction information.

Step 405: Perform bitstream coding to identify the identifier bit that uses the second prediction information.

Step 406: Perform bitstream encoding on each pixel of the image to be encoded region by using second prediction information.

Regarding how to use prediction information and how to perform bit stream encoding on other information, any one of the related techniques can be used.

Table 3 shows the partial pseudo code for encoding in the embodiment of the present invention.

table 3

It is to be noted that Table 3 is only illustrative of the invention, but the invention is not limited thereto.

It is known by the foregoing embodiment that determining whether the image region to be encoded uses the first prediction information or the second prediction information, and performing bitstream encoding on each pixel of the image region to be encoded using the corresponding prediction information; wherein the first prediction information Formed based on pixel information of a plurality of encoded image regions, the second prediction information being formed based on pixel information of an encoded image region adjacent to the image region to be encoded. Thereby, not only the prediction efficiency of the predictor can be improved, but also the bit cost of the encoding can be further reduced.

Example 2

An embodiment of the present invention provides an image encoding apparatus using prediction information, which corresponds to the image encoding method using prediction information in Embodiment 1, and the same content is not described herein again.

FIG. 5 is a schematic diagram of an image encoding apparatus using prediction information according to an embodiment of the present invention. As shown in FIG. 5, the image encoding apparatus 500 includes:

The information determining unit 501 determines whether the image region to be encoded uses the first prediction information or the second prediction information; wherein the first prediction information is formed based on pixel information of the plurality of encoded image regions, and the second prediction information is based on Forming pixel information of the encoded image region adjacent to the coded image region;

The bitstream encoding unit 502 performs bitstream encoding on each pixel of the image region to be encoded using corresponding prediction information.

In this embodiment, the bitstream encoding unit 502 is further configured to: perform bitstream encoding on the identifier bit used to identify whether the first prediction information or the second prediction information is used.

As shown in FIG. 5, the image encoding apparatus 500 may further include:

The area determining unit 503 determines whether the image area to be encoded has the adjacent encoded image area;

The information determining unit 501 directly uses the first prediction information in a case where the image area to be encoded does not have the adjacent encoded image area.

In this embodiment, the adjacent coded image area is the left image area of the image area to be encoded; however, the invention is not limited thereto. In addition, the number of items in the first prediction information is more than the number of items in the second prediction information; for example, the number of items in the first prediction information is 128, and the number of items in the second prediction information does not exceed 64.

As shown in FIG. 5, the image encoding apparatus 500 may further include:

The storage unit 504 stores the first prediction information and the second prediction information that are generated in advance;

The updating unit 505 updates the first prediction information and the second prediction information based on the encoded pixel information.

It is known by the foregoing embodiment that determining whether the image region to be encoded uses the first prediction information or the second prediction information, and performing bitstream encoding on each pixel of the image region to be encoded using the corresponding prediction information; wherein the first prediction information Formed based on pixel information of a plurality of encoded image regions, the second prediction information being formed based on pixel information of an encoded image region adjacent to the image region to be encoded. Thereby, not only the prediction efficiency of the predictor can be improved, but also the bit cost of the encoding can be further reduced.

Example 3

An embodiment of the present invention provides an image decoding method using prediction information, which corresponds to the image encoding method using prediction information in Embodiment 1, and the same content is not described again.

FIG. 6 is a schematic diagram of an image decoding method using prediction information according to an embodiment of the present invention. As shown in FIG. 6, the image decoding method includes:

Step 601: Determine whether the image region to be decoded uses third prediction information or fourth prediction information; wherein the third prediction information is formed based on pixel information of a plurality of decoded image regions, and the fourth prediction information is based on the Forming pixel information of decoded image regions adjacent to the image region;

Step 602: Perform bitstream decoding on each pixel of the image to be decoded region by using corresponding prediction information.

In the present embodiment, the third prediction information corresponds to the first prediction information in Embodiment 1; the fourth prediction information corresponds to the second prediction information in Embodiment 1. For example, the third prediction information is the same as the content of the first prediction information, and the fourth prediction information is the same as the content of the second prediction information.

FIG. 7 is another schematic diagram of an image decoding method using prediction information according to an embodiment of the present invention. As shown in FIG. 7, the image decoding method includes:

Step 701, it is determined whether a certain image area to be decoded has a left image area; in the case of having a left image area, step 702 is performed; if there is no left image area, step 705 is performed;

For example, whether the current CU has a Left CU can be determined by determining the CU_pelX value.

Step 702: Obtain an identifier bit from the bitstream.

Step 703, it is determined whether the flag bit is 1; if it is 1, step 704 is performed; if it is 0, step 705 is performed;

Step 704: Perform bitstream decoding on each pixel of the image area to be decoded using the fourth prediction information.

Step 705: Perform bitstream decoding on each pixel of the image area to be decoded using the third prediction information.

It is to be noted that FIG. 7 is only schematically illustrated. For example, the third prediction information may be used in the case where the flag bit is 1, and the fourth prediction information is used in the case where the flag bit is 0. The present invention is not limited thereto, and a specific implementation manner may be determined according to actual scenarios.

It can be known from the foregoing embodiment that determining whether the to-be-decoded image region uses the third prediction information or the fourth prediction information, and performing bitstream decoding according to the corresponding prediction information; wherein the third prediction information is based on pixel information of the plurality of decoded image regions. Forming, the fourth prediction information is formed based on pixel information of the decoded image region adjacent to the image region to be decoded. Therefore, not only can the prediction efficiency of the predictor be improved, but also One step reduces the bit cost of encoding and decoding.

Example 4

An embodiment of the present invention provides an image decoding apparatus using prediction information, which corresponds to the image decoding method using prediction information in Embodiment 3, and the same content is not described herein again.

FIG. 8 is a schematic diagram of an image decoding apparatus using prediction information according to an embodiment of the present invention. As shown in FIG. 8, the image decoding apparatus 800 includes:

The information determining unit 801 determines whether the image region to be decoded uses third prediction information or fourth prediction information; wherein the third prediction information is formed based on pixel information of a plurality of decoded image regions, the fourth prediction information is based on Forming pixel information of the decoded image region adjacent to the decoded image region;

The bit stream decoding unit 802 performs bit stream decoding on each pixel of the image area to be decoded using the corresponding prediction information.

As shown in FIG. 8, the decoding apparatus 800 may further include:

The area determining unit 803 determines whether the image area to be decoded has the adjacent decoded image area;

The information determining unit 801 directly uses the first prediction information in a case where the image area to be decoded does not have the adjacent decoded image area.

In this embodiment, the adjacent decoded image region is the left image region of the image region to be decoded; however, the present invention is not limited thereto. In addition, the number of items in the third prediction information is more than the number of items in the fourth prediction information; for example, the number of items in the third prediction information is 128, and the number of items in the fourth prediction information does not exceed 64.

As shown in FIG. 8, the decoding apparatus 800 may further include:

The storage unit 804 stores the third prediction information and the fourth prediction information that are generated in advance;

The updating unit 805 updates the third prediction information and the fourth prediction information based on the decoded pixel information.

It can be known from the foregoing embodiment that determining whether the to-be-decoded image region uses the third prediction information or the fourth prediction information, and performing bitstream decoding according to the corresponding prediction information; wherein the third prediction information is based on pixel information of the plurality of decoded image regions. Forming, the fourth prediction information is formed based on pixel information of the decoded image region adjacent to the image region to be decoded. Thereby, not only the prediction efficiency of the predictor can be improved, but also the bit cost of encoding and decoding can be further reduced.

Example 5

An embodiment of the present invention provides an image processing apparatus, comprising: the image encoding apparatus according to Embodiment 2 and/or the image decoding apparatus as described in Embodiment 4.

FIG. 9 is a block diagram showing the configuration of an image processing apparatus according to an embodiment of the present invention. As shown in FIG. 9, the image processing apparatus 900 may include a central processing unit (CPU) 100 and a memory 110; the memory 110 is coupled to the central processing unit 100. The memory 110 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 100.

In one embodiment, the functionality of image encoding device 500 may be integrated into central processor 100. Wherein, the central processing unit 100 can be configured to implement the image encoding method as described in Embodiment 1. And/or, the functions of the image decoding device 800 can also be integrated into the central processing unit 100. Wherein, the central processing unit 100 can be configured to implement the image decoding method as described in Embodiment 3.

In another embodiment, the image encoding device 500 and/or the image decoding device 800 may be configured separately from the central processing unit, for example, the image encoding device 500 and/or the image decoding device 800 may be configured as a chip connected to the central processing unit 100. The functions of the image encoding device 500 and/or the image decoding device 800 are implemented by control of a central processing unit.

In addition, as shown in FIG. 9, the image processing apparatus 900 may further include: an input and output unit 120, a display unit 130, and the like; wherein the functions of the above components are similar to those of the prior art, and details are not described herein again. It is to be noted that the image processing apparatus 900 does not necessarily have to include all of the components shown in FIG. 9; in addition, the image processing apparatus 900 may further include components not shown in FIG. 9, and reference may be made to the related art.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an image processing apparatus, the program causes a computer to execute the image encoding method as described in Embodiment 1 in the image processing apparatus and / or the image decoding method as described in embodiment 3.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the image encoding method as described in Embodiment 1 in the image processing device and/or as in Embodiment 3 The image decoding method described.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims (13)

1. An image encoding method using prediction information, the image encoding method comprising:

   Determining whether the image region to be encoded uses first prediction information or second prediction information; wherein the first prediction information is formed based on pixel information of a plurality of encoded image regions, the second prediction information being based on the image region to be encoded Formed by pixel information of adjacent coded image regions;

   Each pixel of the image to be encoded region is bitstream encoded using corresponding prediction information.
2. The image encoding method according to claim 1, wherein the image encoding method further comprises:

   Bitstream encoding is used to identify an identification bit that uses the first prediction information or the second prediction information.
3. The image encoding method according to claim 1, wherein the image encoding method further comprises:

   Determining whether the image area to be encoded has the adjacent encoded image area;

   In the case where the image area to be encoded does not have the adjacent encoded image area, the first prediction information is directly used.
4. The image encoding method according to claim 1, wherein the adjacent encoded image region is a left image region of the image region to be encoded.
5. The image encoding method according to claim 1, wherein the number of items in the first prediction information is larger than the number of items in the second prediction information.
6. The image encoding method according to claim 1, wherein the image encoding method further comprises:

   And storing the first prediction information and the second prediction information that are pre-generated;

   The first prediction information and the second prediction information are updated based on the encoded pixel information.
7. An image encoding device using prediction information, the image encoding device comprising:

   The information determining unit determines whether the image region to be encoded uses the first prediction information or the second prediction information; wherein the first prediction information is formed based on pixel information of the plurality of encoded image regions, the second prediction information is based on Forming pixel information of an encoded image region adjacent to an image region to be encoded;

   The bit stream encoding unit performs bit stream encoding on each pixel of the image area to be encoded using corresponding prediction information.
8. The image encoding apparatus according to claim 7, wherein said bit stream encoding unit is further configured to: bitstream encode the flag for identifying whether to use said first prediction information or said second prediction information.
9. The image encoding device according to claim 7, wherein the image encoding device further comprises:

   a region determining unit that determines whether the image region to be encoded has the adjacent encoded image region;

   The information determining unit directly uses the first prediction information in a case where the image region to be encoded does not have the adjacent encoded image region.
10. The image encoding device according to claim 7, wherein the adjacent encoded image region is a left image region of the image region to be encoded.
11. The image encoding apparatus according to claim 7, wherein the number of items in the first prediction information is larger than the number of items in the second prediction information.
12. The image encoding device according to claim 7, wherein the image encoding device further comprises:

    a storage unit, configured to store the first prediction information and the second prediction information that are generated in advance;

    And an update unit that updates the first prediction information and the second prediction information based on the encoded pixel information.
13. An image processing apparatus, the image processing apparatus comprising:

    An encoding device that determines whether the image region to be encoded uses first prediction information or second prediction information; wherein the first prediction information is formed based on pixel information of a plurality of encoded image regions, the second prediction information being based on the Forming pixel information of the encoded image region adjacent to the image region; and performing bitstream encoding on each pixel of the image region to be encoded using the corresponding prediction information;

    and / or

    Decoding means, determining whether the image region to be decoded uses third prediction information or fourth prediction information; wherein the third prediction information is formed based on pixel information of the plurality of decoded image regions, the fourth prediction information being based on the Forming pixel information of decoded image regions adjacent to the image region; and performing bitstream decoding on each pixel of the image region to be decoded using corresponding prediction information.

Images