KR101655671B1 - Image encoding method and image encoding apparatus therefor - Google Patents

Image encoding method and image encoding apparatus therefor Download PDF

Info

Publication number
KR101655671B1
KR101655671B1 KR1020150064317A KR20150064317A KR101655671B1 KR 101655671 B1 KR101655671 B1 KR 101655671B1 KR 1020150064317 A KR1020150064317 A KR 1020150064317A KR 20150064317 A KR20150064317 A KR 20150064317A KR 101655671 B1 KR101655671 B1 KR 101655671B1
Authority
KR
South Korea
Prior art keywords
current block
image
block
output
inverse
Prior art date
Application number
KR1020150064317A
Other languages
Korean (ko)
Inventor
신완수
손창환
김호식
윤홍준
Original Assignee
주식회사 실리콘그라피
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 실리콘그라피 filed Critical 주식회사 실리콘그라피
Priority to KR1020150064317A priority Critical patent/KR101655671B1/en
Application granted granted Critical
Publication of KR101655671B1 publication Critical patent/KR101655671B1/en

Links

Images

Classifications

    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
    • 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
    • H04N19/124—Quantisation
    • 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
    • H04N19/169—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
    • H04N19/17—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 an image region, e.g. an object
    • H04N19/176—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 an image region, e.g. an object the region being a block, e.g. a macroblock
    • 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
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

An image encoding method includes a current block prediction process for performing intra prediction of a current block, wherein the current block prediction process uses an original image of a previous block or an image to process the original image of the previous block. The previous block is a block adjacent to the current block and is encoded earlier than the current block. According to the image encoding method and an image encoding apparatus thereof, the present invention can predict the current block even if the encoding process of the previous block is not completed, thereby reducing encoding time.

Description

TECHNICAL FIELD [0001] The present invention relates to an image encoding method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image encoding method and an image encoding apparatus thereof, and more particularly, to an image encoding method in Intra Prediction in H.264 and an image encoding apparatus thereof.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a coding procedure of a general H.264 image coding apparatus. FIG.

Generally, the coding of the H.264 image coding apparatus, which can be seen from FIG. 1, divides a coding unit (Coding Unit) divided into 16 pixels by 16 pixels into 4 × 4 square blocks again. In addition, the encoding order may be performed in the order of Zig-Zag with reference to neighboring blocks as illustrated in FIG.

2 is an explanatory diagram of encoding of a conventional H.264 image encoding apparatus.

As can be seen from FIG. 2, at the time of H.264 moving picture compression, a current block is predicted from neighboring pixels of a previously encoded neighboring block, and a compensated reconstructed image is obtained.

Here, the term 'prediction' refers to an image which is most similar to the image of the current block to be actually predicted in a plurality of candidate images based on the adjacent pixels of the pre-coded neighboring block, that is, reference pixels, To obtain images. In addition, the image encoding apparatus encodes the difference component between the original image and the predicted image, and generates a reconstructed image in which the difference component is compensated.

FIG. 3 shows a configuration diagram of a conventional H.264 image coding apparatus 100. FIG.

3, the conventional H.264 image coding apparatus 100 includes a predictor 110, a transformer 120, a quantizer 130, an inverse quantizer 140, an inverse transformer 150 ), And an entropy coding unit 160.

First, the predictor 110 predicts a current block using a reconstructed image of at least one previous block adjacent to the current block and encoded. The transformer 120 transforms the differential component between the original image of the current block and the intra prediction image of the current block by the predictor 110 and performs a discrete cosine transform , DCT) can be used.

The quantizer 130 and the inverse quantizer 140 perform a Forward Quantization and an Inverse Quantization, respectively. Next, the inverse transformer 150 performs an inverse transform and uses an inverse discrete cosine transform (IDCT).

As a result, the conventional image coding apparatus 100 compensates the difference component of the predicted image of the current block using the output of the inverse transformer 150, restores the image of the current block, and outputs the restored image through the entropy coding unit 160 can do.

However, in the case of the conventional image encoding apparatus 100, if the encoding process of the previous block is not completed, the predictor 110 can not predict the current block.

FIG. 4 is an explanatory view of the operation of the conventional H.264 image encoding apparatus 100. FIG.

In the conventional image encoding apparatus 100 for H.264, the encoding process of each block can be divided into prediction and transformation from the viewpoint of the overall pipeline flow, and the structural prediction of the encoding process And conversion can not proceed at the same time.

Therefore, in the case of the conventional H.264 image coding apparatus 100, a long time is required to perform the coding.

An object of the present invention is to solve the technical problems described above, and an object of the present invention is to provide an image encoding method capable of predicting a current block even when the encoding process of the previous block is not completed, And an object of the present invention is to provide a device.

According to another aspect of the present invention, there is provided a method of encoding an image, the method comprising: a current block prediction step of performing intra prediction of a current block, wherein the current block prediction step comprises: And an image obtained by processing the original image is used. Here, the previous block is a block adjacent to the current block and beginning encoding before the current block.

Specifically, the image encoding method of the present invention includes: a first conversion step of converting a difference component between an original image of the current block and an image output from the current block prediction step; A first quantization step of quantizing an output of the first conversion step; A first inverse quantization step of inversely quantizing an output of the first quantization step; And a first inverse transformation step of inversely transforming the output of the first dequantization step.

According to another aspect of the present invention, there is provided a method of encoding an image, the method comprising: a second conversion step of converting 1xN or Nx1 pixels among NxN pixels of the previous block for processing an original image of the previous block; A second quantization step of quantizing the output of the second conversion step; A second inverse quantization step of inversely quantizing an output of the second quantization step; And a second inverse transformation step of inversely transforming the output of the second dequantization step.

Preferably, the second transforming step and the second inverse transforming step may use a one-dimensional Hadamard Transform and a one-dimensional Inverse Hadamard Transform, respectively. The 1 × N or N × 1 pixels of the previous block are pixels of a previous block adjacent to a current block to be predicted.

The second quantization step performs quantization using a pre-stored lookup table, and the second dequantization step performs inverse quantization using a pre-stored look-up table. It is also preferable that the image encoding method of the present invention performs intraprediction of the current block using the output of the second dequantization step.

The image encoding apparatus according to an embodiment of the present invention performs intraprediction of a current block, and intraprediction of the current block is performed by a predictor to process the original image of the previous block or the original image of the previous block Use one image. Here, the previous block is a block adjacent to the current block and beginning encoding before the current block.

The image encoding apparatus of the present invention includes: a first transformer for transforming a difference component between an original image of the current block and a resultant image of intra-prediction of the current block; A first quantizer for quantizing an output of the first converter; A first dequantizer for dequantizing an output of the first quantizer; And a first inverse transformer for inversely transforming the output of the first dequantizer.

In addition, the image encoding apparatus of the present invention may include a second converter for converting 1xN or Nx 1 pixels among NxN pixels of the previous block, for processing an original image of the previous block; A second quantizer for quantizing an output of the second converter; A second inverse quantizer for inversely quantizing the output of the second quantizer; And a second inverse transformer for inversely transforming the output of the second dequantizer.

Also, the second converter and the second inverse transformer may use a one-dimensional Hadamard Transform and a one-dimensional Inverse Hadamard Transform, respectively. Here, the 1xN or Nx1 pixels of the previous block are pixels of a previous block adjacent to a current block to be predicted.

Specifically, the second quantizer performs quantization using a lookup table stored in advance, and the second dequantizer performs inverse quantization using a pre-stored look-up table.

In addition, the image encoding apparatus of the present invention is characterized in performing intraprediction of the current block using the output of the second dequantizer.

According to the image encoding method and image encoding apparatus of the present invention, the current block can be predicted even if the encoding process of the previous block is not completed, thereby shortening the encoding execution time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a coding procedure of a video coding apparatus for H.264; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image encoding apparatus for H.264.
3 is a configuration diagram of a conventional H.264 image coding apparatus.
FIG. 4 is an explanatory view of a conventional image coding apparatus for H.264; FIG.
5 is a configuration diagram of an image encoding apparatus according to a first embodiment of the present invention.
Fig. 6 is an exemplary diagram in which Fig. 1 is extended to a plurality of encoding units; Fig.
FIG. 7 is an explanatory diagram of an operation of the image encoding apparatus according to the first preferred embodiment of the present invention. FIG.
8 is a flowchart of a method of encoding an image according to a first embodiment of the present invention.
9 is a configuration diagram of an image encoding apparatus according to a second embodiment of the present invention.
10 is an explanatory view of operations of a second transformer, a second quantizer, a second inverse quantizer, and a second inverse transformer;
11 is a flowchart of a video encoding method according to a second embodiment of the present invention.

Hereinafter, an image encoding method and an image encoding apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be understood that the following embodiments of the present invention are only for embodying the present invention and do not limit or limit the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

The image encoding method and the image encoding apparatus according to the embodiments of the present invention can be used for H.264 video compression, but the use thereof is of course not limited.

5 is a block diagram of a video encoding apparatus 200 according to a first exemplary embodiment of the present invention.

5, the image encoding apparatus 200 according to the first embodiment of the present invention includes a predictor 210, a first converter 220, a first quantizer 230, a first inverse quantization A first inverse transformer 240, and an entropy coder 260. [

First, the predictor 210 predicts a current block by using an original image of at least one previous block adjacent to the current block but starting to be encoded before starting encoding of the current block.

As described in the Background of the Invention with reference to FIG. 2, the term "prediction" refers to prediction based on neighboring pixels of a neighboring block starting encoding of a current block, that is, reference pixels The most similar image to the image of the current block to be predicted, that is, the image with the smallest error energy, is obtained from a plurality of generated candidate images. In addition, the image encoding apparatus 200 encodes the difference component between the original image and the predicted image, and generates a reconstructed image in which the difference component is compensated.

The first transformer 220 transforms the difference component between the original image of the current block and the resultant image of the intra prediction of the current block by the predictor 210, (Discrete Cosine Transform, DCT).

The first quantizer 230 and the first dequantizer 240 perform forward quantization and inverse quantization, respectively. Next, the first inverse transformer 250 performs an inverse transform, and uses an inverse discrete cosine transform (IDCT).

Here, the meaning of the previous block will be briefly described.

Referring to FIG. 1, when the fourth block is referred to as a current block, the previous block reaches the first, second, and third blocks, which are adjacent to the current block and start encoding before starting encoding of the current block.

FIG. 6 is an example of an extension of FIG. 1 to a plurality of encoding units.

If the first block is referred to as a current block, a block which is included in an adjacent encoding unit, not the encoding unit to which the first block belongs, but which is displayed as a hatched portion adjacent to the first block corresponds to the previous block. That is, the previous block means a block adjacent to the current block and beginning encoding before the current block.

It is needless to say that the meaning of the previous block is applied to the image encoding apparatus 300 according to the second preferred embodiment of the present invention as well as the image encoding apparatus 200 according to the first preferred embodiment of the present invention.

As a result, the image encoding apparatus 200 according to the first embodiment of the present invention compensates the difference component of the predicted image of the current block using the output of the first inverse transformer 250 to restore the image of the current block , And the entropy coding unit 260. [

7 is an operation explanatory diagram of an image encoding apparatus 200 according to the first exemplary embodiment of the present invention.

The predictor 210 of the image encoding apparatus 200 according to the first embodiment of the present invention can predict the current block using the original image as it is instead of the reconstructed image of at least one previous block that has been encoded.

Therefore, it can be seen that the prediction of the current block is possible before the restoration of the previous block as shown in FIG.

FIG. 8 is a flowchart illustrating a method of encoding an image according to a first embodiment of the present invention.

The image encoding method according to the first preferred embodiment of the present invention uses the image encoding apparatus 200 according to the first preferred embodiment of the present invention and thus the image encoding method according to the first preferred embodiment of the present invention It is a matter of course that all the features of the image encoding apparatus 200 are included.

As can be seen from FIG. 8, the image encoding method according to the first preferred embodiment of the present invention includes a current block prediction step (S110) for performing intra prediction of a current block, A first quantization step S130 for quantizing the output of the first transformation step S120; a first quantization step S130 for quantizing the output of the first transformation step S120; (S140) and a first inverse transformation step (S150) of inversely transforming the output of the first dequantization step (S140).

In addition, the image encoding method according to the first exemplary embodiment of the present invention further includes an entropy coding step (S160).

Specifically, in the present block prediction step (S110), the original image of the previous block is used. Here, the previous block means a block adjacent to the current block and beginning encoding before the current block.

9 is a block diagram of a video encoding apparatus 300 according to a second embodiment of the present invention.

9, the image encoding apparatus 300 according to the second preferred embodiment of the present invention includes a predictor 310, a first converter 320, a first quantizer 330, a first inverse quantization A first inverse transformer 340, and an entropy coder 360. The first inverse transformer 340 and the first inverse transformer 350 are connected to each other.

The image encoding apparatus 300 according to the second embodiment of the present invention includes a second transformer 365, a second quantizer 370, a second inverse quantizer 375, and a second inverse transformer 380 ). ≪ / RTI >

The first transformer 320, the first quantizer 330, the first inverse quantizer 340, the first inverse transformer 350 and the entropy coder 360 are identical to the first transformer 320 of the first embodiment of the present invention Transformer 220, the first quantizer 230, the first dequantizer 240, the first inverse transformer 250, and the entropy coder 260. [

However, the predictor 310 of the second embodiment of the present invention performs intra prediction of the current block, and uses an image obtained by simply processing the original image of the previous block.

As described in the Background of the Invention with reference to FIG. 2, the term "prediction" refers to prediction based on neighboring pixels of a neighboring block starting encoding of a current block, that is, reference pixels The most similar image to the image of the current block to be predicted, that is, the image with the smallest error energy, is obtained from a plurality of generated candidate images. In addition, the image encoding apparatus 200 encodes the difference component between the original image and the predicted image, and generates a reconstructed image in which the difference component is compensated.

The second transformer 365, the second quantizer 370, the second inverse quantizer 375 and the second inverse transformer 380 are added to the image obtained by simply processing the original image of the previous block There is a feature of the image encoding apparatus 300 according to the second embodiment of the present invention.

Specifically, the second converter 365 serves to convert the 1 × N or N × 1 pixels among the N × N pixels of the previous block. The second quantizer 370 quantizes the output of the second converter 365 and the second dequantizer 375 dequantizes the output of the second quantizer 370 . The second inverse transformer 380 inversely transforms the output of the second inverse quantizer 375.

10 is an operation explanatory diagram of the second transformer 365, the second quantizer 370, the second inverse quantizer 375, and the second inverse transformer 380.

10, the second converter 365 and the second inverse transformer 380 use a one-dimensional Hadamard Transform and a one-dimensional Inverse Hadamard Transform, respectively.

In addition, 1xN or Nx1 pixels of the previous block, which are pixels of the previous block adjacent to the current block to be predicted, are obtained. Here, N is preferably 4.

For example, in FIG. 1, block 4 is the current block. In the case of block 3, the 1 × N or N × 1 pixels in contact with the current block are the four pixels in the rightmost column, 1 < / RTI > That is, in the case of the third block, the pixels in the fourth column are N × 1 pixels of the previous block.

As another example, if the block 4 in FIG. 1 is a current block, the 1 × N or N × 1 pixels adjacent to the current block in the case of the block # 2 means the four pixels in the lowermost row, × 4 matrix. That is, in the case of the second block, the pixels of the fourth row are 1 x N pixels of the previous block.

In addition, the second quantizer 370 performs quantization using a first lookup table stored beforehand, and the second dequantizer 375 performs dequantization using a second lookup table stored in advance .

Consequently, the image encoding apparatus 300 according to the second embodiment of the present invention performs the intra-prediction of the current block by the predictor 310 using the output of the second de-quantizer 375.

In summary, the image encoding apparatus 300 according to the second embodiment of the present invention includes a first converter 320 for performing an actual image restoration in order to perform prediction of a current block even when the encoding process of the previous block is not completed A second transformer 365, a second quantizer 370, a second inverse transformer 370, and a second inverse transformer 375. The second transformer 365, the second quantizer 370, and the second inverse transformer 375 are provided separately from the first quantizer 330, the first inverse quantizer 340, and the first inverse transformer 350, A quantizer 375 and a second inverse transformer 380. [ The second transformer 365, the second quantizer 370, the second inverse quantizer 375, and the second inverse transformer 380 perform a simple operation process. Therefore, the first transformer 320, The second inverse quantizer 330, the first inverse quantizer 340, and the first inverse transformer 350. [

In other words, it can be seen that the prediction of the current block is possible before the restoration of the previous block, as shown in FIG.

11 is a flowchart illustrating a method of encoding an image according to a second embodiment of the present invention. Since the image encoding method according to the second preferred embodiment of the present invention uses the image encoding apparatus 300 according to the second preferred embodiment of the present invention, It is needless to say that the present invention includes all the features of the image encoding apparatus 300.

As can be seen from FIG. 11, the image encoding method according to the second preferred embodiment of the present invention includes a current block predicting step S210 for performing intra prediction of a current block, A first quantization step S230 for quantizing the output of the first transforming step S220, a first quantization step S230 for quantizing the output of the first transforming step S220, a first transforming step S230 for transforming the difference component of the image output from the block predicting step S210, A first inverse quantization step S240 of inversely quantizing the output of the first inverse quantization step S240 and a first inverse transformation step S250 of inversely transforming the output of the first inverse quantization step S240.

In addition, the image encoding method according to the first preferred embodiment of the present invention further includes an entropy coding step (S260).

Specifically, in the current block prediction step S210, an image obtained by processing the original image of the previous block is used. Here, the previous block means a block adjacent to the current block and beginning encoding before the current block.

In addition, in order to process an original image of a previous block, an image encoding method according to a second preferred embodiment of the present invention includes converting a 1 × N or N × 1 pixels among N × N pixels of a previous block A second inverse quantization step S330 for inversely quantizing outputs of the second quantization step S320 and the second quantization step S320 for quantizing the outputs of the first and second conversion steps S310 and S310, And a second inverse transformation step (S340) of inversely transforming the output of the inverse quantization step (S330).

Specifically, the second transforming step S310 and the second inverse transforming step S340 use a one-dimensional Hadamard Transform and a one-dimensional Inverse Hadamard Transform, respectively. The 1xN or Nx1 pixels of the previous block are the pixels of the previous block adjacent to the current block to be predicted. Here, N is preferably 4.

The second quantization step S320 performs quantization using a pre-stored first lookup table, and the second dequantization step S330 performs inverse quantization using a pre-stored second lookup table. .

Consequently, the image encoding method according to the second preferred embodiment of the present invention performs intraprediction of the current block using the output of the second dequantization step (S330).

As described above, according to the image encoding method and image encoding apparatuses 200 and 300 of the present invention, it is possible to predict the current block even if the encoding process of the previous block is not completed, thereby shortening the encoding execution time have. In this case, shortening the encoding time is a great advantage considering not only the actual run-time but also resources required for hardware implementation.

100: Conventional H.264 image encoding apparatus
200: Image encoding apparatus according to the first embodiment of the present invention
300: An image encoding apparatus according to the second embodiment of the present invention
110, 210, 310: predictor 120: converter
130: Quantizer 140: Inverse quantizer
150: Inverse transformer 160, 260, 360: Entropy coding unit
220, 320: first converter 230, 330: first quantizer
240, 340: a first inverse quantizer 250, 350: a first inverse transformer
365: second converter 370: second quantizer
375: second inverse quantizer 380: second inverse transformer

Claims (18)

In the image encoding method,
And a current block prediction step of performing intra prediction of a current block,
Wherein the current block prediction step uses an image obtained by processing an original image of a previous block,
Wherein the previous block is a block that is adjacent to the current block and starts encoding earlier than the current block,
Wherein the image encoding method comprises the steps of:
A second conversion step of converting 1xN or Nx1 pixels among NxN pixels of the previous block;
A second quantization step of quantizing an output of the second conversion step using a pre-stored lookup table;
A second inverse quantization step of inversely quantizing the output of the second quantization step using a pre-stored lookup table; And
And a second inverse transform step of inversely transforming the output of the second inverse quantization step,
Wherein the 1 × N or N × 1 pixels of the previous block are pixels of a previous block adjacent to a current block to be predicted. The method according to claim 1,
The image encoding method includes:
A first conversion step of converting a difference component between an original image of the current block and an image output from the current block prediction step;
A first quantization step of quantizing an output of the first conversion step;
A first inverse quantization step of inversely quantizing an output of the first quantization step; And
And a first inverse transformation step of inversely transforming the output of the first dequantization step. delete delete The method according to claim 1,
The second conversion step and the second inverse conversion step, respectively,
A one-dimensional Hadamard Transform and a one-dimensional Inverse Hadamard Transform are used. delete delete delete The method according to claim 1,
The image encoding method includes:
And performing intra prediction of the current block using the output of the second inverse quantization step. A video encoding apparatus comprising:
The intra prediction of the current block is performed,
Wherein the intra prediction of the current block uses an image obtained by processing an original image of a previous block by a predictor,
Wherein the previous block is a block that is adjacent to the current block and starts encoding earlier than the current block,
Wherein the image encoding apparatus further comprises:
A second converter for converting 1xN or Nxl pixels among NxN pixels of the previous block;
A second quantizer for quantizing an output of the second converter using a lookup table stored in advance;
A second inverse quantizer for inversely quantizing an output of the second quantizer using a lookup table stored in advance; And
And a second inverse transformer for inversely transforming the output of the second dequantizer,
Wherein the 1 × N or N × 1 pixels of the previous block are pixels of a previous block adjacent to a current block to be predicted. 11. The method of claim 10,
The image encoding apparatus comprising:
A first converter for converting a difference component between an original image of the current block and a result image of intra prediction of the current block;
A first quantizer for quantizing an output of the first converter;
A first dequantizer for dequantizing an output of the first quantizer; And
And a first inverse transformer for inversely transforming the output of the first dequantizer. delete delete 11. The method of claim 10,
The second transducer and the second inverse transformer, respectively,
Wherein the one-dimensional Hadamard Transform and the one-dimensional Inverse Hadamard Transform are used. delete delete delete 11. The method of claim 10,
The image encoding apparatus comprising:
And performs intra prediction of the current block using the output of the second dequantizer.
KR1020150064317A 2015-05-08 2015-05-08 Image encoding method and image encoding apparatus therefor KR101655671B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150064317A KR101655671B1 (en) 2015-05-08 2015-05-08 Image encoding method and image encoding apparatus therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150064317A KR101655671B1 (en) 2015-05-08 2015-05-08 Image encoding method and image encoding apparatus therefor

Publications (1)

Publication Number Publication Date
KR101655671B1 true KR101655671B1 (en) 2016-09-07

Family

ID=56950067

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150064317A KR101655671B1 (en) 2015-05-08 2015-05-08 Image encoding method and image encoding apparatus therefor

Country Status (1)

Country Link
KR (1) KR101655671B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060105352A (en) * 2005-04-04 2006-10-11 삼성전자주식회사 Method and apparatus for intra prediction
JP2011041014A (en) * 2009-08-11 2011-02-24 Canon Inc Device for encoding moving image, method of controlling the same, and program
KR20140079882A (en) * 2012-12-18 2014-06-30 한양대학교 산학협력단 Apparatus and method for video coding/decoding using adaptive intra prediction
KR101432775B1 (en) * 2008-09-08 2014-08-22 에스케이텔레콤 주식회사 Video Encoding/Decoding Method and Apparatus Using Arbitrary Pixel in Subblock

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060105352A (en) * 2005-04-04 2006-10-11 삼성전자주식회사 Method and apparatus for intra prediction
KR101432775B1 (en) * 2008-09-08 2014-08-22 에스케이텔레콤 주식회사 Video Encoding/Decoding Method and Apparatus Using Arbitrary Pixel in Subblock
JP2011041014A (en) * 2009-08-11 2011-02-24 Canon Inc Device for encoding moving image, method of controlling the same, and program
KR20140079882A (en) * 2012-12-18 2014-06-30 한양대학교 산학협력단 Apparatus and method for video coding/decoding using adaptive intra prediction

Similar Documents

Publication Publication Date Title
US11722682B2 (en) Simplified binary arithmetic coding engine
JP4927207B2 (en) Encoding method, decoding method and apparatus
JP5777080B2 (en) Lossless coding and related signaling methods for composite video
JP5620641B2 (en) Video encoding / decoding apparatus and method using adaptive scanning
RU2417547C2 (en) Signalling maximum dynamic range for inverse discrete cosine transform
CA2863170C (en) Video decoder, video encoder, video decoding method, and video encoding method
KR20210088708A (en) Method and apparatus for video coding
US11968394B2 (en) Low complexity large transform
TW201320751A (en) Video encoding and decoding using transforms
EP2036351A1 (en) Image encoding/decoding method and apparatus
JP2018507625A (en) Coding escape pixels for palette mode coding
JP2022511883A (en) Methods and equipment for video coding
KR20150099165A (en) Tsm rate-distortion optimizing method, encoding method and device using the same, and apparatus for processing picture
JP2022515799A (en) Video decoding methods and devices, as well as programs
US20220217348A1 (en) Encoding device, decoding device and program
KR101596085B1 (en) Apparatus and method for video coding/decoding using adaptive intra prediction
KR101911587B1 (en) Apparatus and method for video coding/decoding using adaptive intra prediction
JPH06225279A (en) Coding/decoding methods and coding/decoding devices
KR20100089546A (en) Method and apparatus for successively encoding/decoding image
US11677965B2 (en) Decoding device, program, and decoding method
KR101655671B1 (en) Image encoding method and image encoding apparatus therefor
KR20160105203A (en) A multimedia codec, an application processor including the multimedia codec, and a method of operating the application processor
JP2007266861A (en) Image encoding device
JP2006237765A (en) Image coding apparatus
US20170257632A1 (en) Encoding method of image encoding device

Legal Events

Date Code Title Description
GRNT Written decision to grant