KR101356890B1 - Method and apparatus of inter-view video encoding and decoding in hybrid codecs for multi-view video coding - Google Patents

Abstract

Disclosed are a video inter-view encoding and decoding method in a heterogeneous codec for multiview video, and an apparatus thereof. A multi-view video encoding / decoding method between heterogeneous codecs includes first encoding / decoding a first input video in one of the heterogeneous codecs; And encoding / decoding a second input video by using a result of first encoding / decoding of the first input video in another codec of the heterogeneous codecs. In this case, the encoding / decoding of the second input video may include encoding / decoding the second input video using a motion vector of the encoded / decoded block in the first input video corresponding to the current encoding / decoding block of the second input video. Can be decrypted In addition, the above-described reference encoding / decoding method between heterogeneous codecs has a technical concept that can be easily applied to a heterogeneous codec combination as much as a viewpoint for two or more multiview video inputs.

Description

Method of video inter-view encoding and decoding in heterogeneous codecs for multi-view video and its apparatus TECHNICAL FIELD

Embodiments of the present invention relate to a method and apparatus for performing encoding and decoding through motion vector prediction between different video codecs in providing two or more different video codecs to provide a hybrid realistic broadcast service.

Many video encoding algorithms or standard technologies have been developed, and different video codec standards have been adopted and used in various services. Therefore, when a new additional service is provided to a currently provided service, a video codec and a new additional service are used. Due to the heterogeneity between the video codecs used, coding efficiency is inferior because each video codec is applied to provide a separate video compression bitstream to an existing service and an additional service.

For example, the MPEG-2 video codec is currently applied to the digital TV 2D broadcasting service, and the stereoscopic video is obtained by encoding an additional right-eye view video with the current video input as left-eye view video. When providing a service, stereoscopic video using a heterogeneous codec is typically provided by separately encoding a right eye video input using an H.264 / AVC codec having a higher compression rate than an MPEG-2 video codec and providing an additional compressed bitstream. Can provide services. In this case, since the left eye and the right eye input video are separately encoded by the MPEG-2 video and the H.264 method in the encoding process, information between the left eye and the right eye input video cannot be used, which causes a problem of low coding efficiency.

Therefore, there is a need for a method for improving encoding efficiency when encoding multi-view video using different codecs.

Provided are a method and an apparatus for improving encoding efficiency by using a result encoded or decoded between heterogeneous codecs when encoding or decoding a multiview video inputted through a heterogeneous codec.

According to an aspect of the present invention, a multi-view video encoding / decoding method between heterogeneous codecs includes: first encoding / decoding a first input video in one of the heterogeneous codecs; And encoding / decoding a second input video by using a result of first encoding / decoding of the first input video in another codec of the heterogeneous codecs.

The encoding / decoding of the second input video may include encoding the second input video using a motion vector of a coded / decoded block in the first input video corresponding to a current encoding / decoding block of the second input video. Can be encoded / decoded.

The encoding / decoding of the second input video may include: movement of an already encoded / decoded block in the first input video corresponding to a disparity vector of a neighboring block that is already encoded / decoded in the second input video. The vector may be used to encode / decode a current encoding / decoding block in the second input video.

The encoding / decoding of the second input video may include performing inter-view prediction encoding on the second input video with reference to the encoded / decoded result of the first input video to which adaptive loop filtering is applied. Decryption can be performed.

The encoding / decoding of the second input video may include using an adaptive loop filtering coefficient applied to the first input video and information indicating a region to which adaptive loop filtering is applied in the first input video. The second input video may be encoded / decoded.

According to another aspect of the invention, a computer readable storage medium comprising instructions for controlling a computer system to encode / decode a multiview video, wherein the instructions first encode / encode the first input video in one of the heterogeneous codecs. Decrypting; And encoding / decoding a second input video by using a result of first encoding / decoding of the first input video in the one codec in another codec of the heterogeneous codecs. Can be.

According to still another aspect of the present invention, an apparatus for encoding / decoding a multiview video using different heterogeneous codecs includes: a first codec that encodes / decodes a first input video at one point in time; And a second codec that encodes / decodes a second input video at a different point in time from the first input video by using a result of first encoding / decoding of the first input video by the first codec.

According to the present invention, unlike the conventional method of independently encoding / decoding each view input video using one or more different video codecs in multiview video encoding / decoding using a heterogeneous codec, Coding efficiency can be improved by first using coded / decoded information (motion vector prediction, adaptive loop filtering, etc.) in another codec between different heterogeneous codecs.

1 illustrates a codec in an apparatus that encodes / decodes data that is first encoded / decoded in one codec by another codec between different heterogeneous codecs encoding input video between two viewpoints. Is a diagram illustrating a multi-view video encoding / decoding method between heterogeneous codecs in which coded / decoded data includes a motion vector.
FIG. 2 is a diagram illustrating an embodiment of an apparatus for encoding / decoding data obtained by encoding / decoded data in one codec by another codec between different heterogeneous codecs encoding input video between two viewpoints. 1 illustrates a method of referring to a reference frame to which adaptive loop filtering is applied to encoded / decoded data in a current coding block coded by another heterogeneous codec.
FIG. 3 is a diagram illustrating a filter kernel and an optimal solution derivation method for obtaining an adaptive loop filter coefficient applied to an MPEG-2 reconstructed image according to a second embodiment of the present invention. FIG.
4 is a diagram illustrating an example of displaying an adaptive loop filtering region applied to an MPEG-2 reconstructed image according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an example of a method of encoding / decoding two viewpoint video using two heterogeneous codecs in order to assist technical understanding in a method of encoding / decoding a multiview video by configuring two or more heterogeneous codecs. Explain. However, it is apparent that the present invention is not limited to a heterogeneous codec consisting of only two.

The present invention relates to a method and apparatus for encoding / decoding multiview video using different heterogeneous codecs. In the present embodiment, a first codec which encodes / decodes a first input video of one view; And a second codec which encodes / decodes a second input video of another view using a result of first encoding / decoding a first codec with respect to the first input video. For example, stereoscopic video encoding and decoding may be composed of heterogeneous codecs such as MPEG-2 video codec and H.264 / AVC codec, or MPEG-2 video codec and HEVC (High Efficiency Video Coding) codec.

In the present invention, the left eye image encoding and decoding process uses an MPEG-2 video codec, and the right eye image input encoding and decoding process uses a heterogeneous codec structure using the HEVC codec as an example. In other words, a method and apparatus for improving encoding efficiency for a right eye image input by encoding and decoding a heterogeneous codec composed of an MPEG-2 video codec and an HEVC codec will be described below. The configuration of the heterogeneous codecs is not limited thereto, and may be changed to two different codecs as needed.

A key technical aspect of the present invention is that unlike the conventional method of providing a compressed bitstream by encoding left eye and right eye images of stereoscopic video using two different codecs, one codec of two codecs is provided. The encoding and decoding information is used in encoding and decoding processes in other heterogeneous codecs to provide an improvement in encoding efficiency. Through such technical means, the object of the present invention can be easily achieved.

1 illustrates encoding and decoding information of an MPEG-2 video codec among different MPEG-2 video codecs and an HEVC codec in HEVC as another heterogeneous codec for stereoscopic video encoding and decoding according to a first embodiment of the present invention. FIG. 1 shows an embodiment for improving coding efficiency of HEVC used in a coding and decoding process.

In the present embodiment, data that is first encoded / decoded by one codec may include a motion vector, and video of another view may be encoded / decoded by using a motion vector of an input video that is first encoded / decoded by another codec. . In addition, in the present embodiment, a motion vector prediction encoding of one codec is performed by using a disparity vector of data first encoded / decoded in one codec by using a motion vector of a video of another view in another codec corresponding thereto. Can be used for decoding.

라고 하고 시간 t에서 MPEG-2 비디오 코덱에서 부호화/복호화 되는 좌안(left-view) 입력 프레임을

라고 하자. 또한 프레임

은 MPEG-2 비디오 코덱에 의해 이미 부호화/복호화가 완료된 프레임을 나타낸다고 가정한다. 프레임

를 HEVC 코덱에서 부호화/복호화하고자 할 때,

의 현재 부호화 블록 D의 움직임 벡터(

)를 예측 부호화하기 위해서는 주변 블록인 A₀, A₁, B₀, B₁, B₂의 공간 움직임 벡터나 참조 프레임의 동일 위치 대응 블록 C의 시간 움직임 벡터 중에 하나를 현재 블록의 움직임 예측 벡터로 사용할 수 있다.1 shows a right-view input frame encoded / decoded by the HEVC codec at time t.

And the left-view input frame encoded / decoded by the MPEG-2 video codec at

Let's say. Also frame

Assumes that a frame has already been encoded / decoded by the MPEG-2 video codec. frame

To encode / decode the HEVC codec,

The motion vector of the current coding block D of

), _One of the spatial motion vectors of the neighboring blocks A ₀ , A ₁ , B ₀ , B ₁ , and B _{2 or} the temporal motion vectors of the co-located block C of the reference frame is used as the motion prediction vector of the current block. Can be used.

However, these neighboring blocks (A ₀ , A ₁ , B ₀ , B ₁ , B ₂ ) or the same position blocks (C) of the reference frame are encoded by intra coding or have only a parallax vector, and thus the motion of the corresponding blocks If the vector does not exist, that is, it cannot be used as the motion prediction vector of the current block, the motion of the disparity compensated block after compensating the disparity for a block at the same position of another frame of view (left eye) that has already been encoded / decoded The present invention can provide a method and apparatus that can improve coding efficiency in encoding the motion vector of the current block by using the vector as a motion prediction vector of the current block instead. In other words,

는 각각 현재 블록의 움직임 예측 벡터 후보 및 다른 시점 프레임에 위치하는 시차 보상 움직임 벡터(disparity-compensated motion vector)이다. (i, j)는 현재 블록의 중심 위치와 동일한 다른 시점 프레임에서의 위치이다. (dv _x , dv _y )는 도 1에 표시된

로서 이웃 블록의 부호화에 사용된 현재 프레임과 다른 시점 프레임간의 시차 벡터이다. 또한 MPEG-2 Video는 1/2화소까지의 움직임 벡터 예측을 하는 반면 HEVC는 1/4화소까지의 움직임 벡터 예측 정밀도를 가지기 때문에, MPEG-2 Video가 사용된 좌안 영상 부호화에 의해 결정된 움직임 벡터들에 2를 곱해주어 단위를 맞추어 준다.Where MVP _cur and

Are respectively disparity-compensated motion vectors located in the motion prediction vector candidate of the current block and in different view frames. ( i , j ) is the position in another view frame that is the same as the center position of the current block. ( dv _x , dv _y ) is shown in FIG.

A parallax vector between a current frame and another view frame used for encoding a neighboring block. Also, since MPEG-2 Video performs motion vector prediction up to 1/2 pixel, while HEVC has motion vector prediction accuracy up to 1/4 pixel, motion vectors determined by left eye image coding using MPEG-2 Video are used. Multiply by 2 to match the units.

FIG. 2 illustrates encoding and decoding information of an MPEG-2 video codec among different MPEG-2 video codecs and an HEVC codec in HEVC, which is another heterogeneous codec for stereoscopic video encoding and decoding according to a second embodiment of the present invention. Another diagram of improving the coding efficiency of HEVC is used in the encoding and decoding process.

In this embodiment, adaptive loop filtering is applied to a reconstructed image coded / decoded first by one codec, and the reconstructed image after the adaptive loop filtering is applied is referenced by another codec. Can be performed. In addition, in the present embodiment, information indicating an area to which adaptive loop filtering is applied to a reconstructed image coded / decoded first by one codec and a bitstream output from a corresponding codec or a bitstream output from the corresponding codec are applied. By including it in a stream, video of different views can be encoded / decoded by another codec by using data encoded / decoded first by one codec.

를 HEVC 코덱에서 부호화/복호화하고자 할 때,

의 현재 부호화 블록 D가 이미 MPEG-2비디오 코덱에 의해 부호화/복호화가 완료된

을 참조하고자 할 경우

에 적응적 루프 필터링 과정 적용을 통해

의 화질을 향상시킨 후 참조를 수행함으로써

의 현재 부호화 블록의 발생 잔차신호의 양을 감소시킴으로써 부호화 효율 향상을 가져올 수 있다. 적용되는 적응적 루프 필터(ALF)의 계수는 도 3과 같이 구해진다. 적응적 루프 필터의 계수는 도 3에 나와 있듯이 필터링을 수행한 후의 복원 영상의 화소 값이 원본 영상의 화소 값과 동일한 값을 가지도록 설계된다. 이 때 적응적 루프 필터는 임의 개의 필터 계수 N을 갖고 N-1 개의 주변 화소들과 현재 화소 값의 가중 합이 현재 화소와 동일한 위치에 있는 원본 영상의 화소 값과 일치하는 값을 갖도록 필터링을 수행한다. 이와 같은 작업을 수행하는 일정 영역 z 안에 있는 화소들의 적응적 루프 필터링 방정식을 이용하여 도 3의 행렬식을 만들 수 있고 도 3의 행렬식을 만족하는 역행렬을 구하면 원본 영상과 복원 영상의 왜곡을 최소화하는 필터 계수를 구할 수 있다. 여기서

에 적용한 적응적 루프 필터링 계수와

내의 적응적 루프 필터링이 적용된 영역 표시에 대한 정보를 비트스트림에 표현한다.2, the frame

To encode / decode the HEVC codec,

Current encoding block D has already been encoded / decoded by the MPEG-2 video codec.

If you want to see

By applying an adaptive loop filtering process to

By improving the quality of the

Encoding efficiency can be improved by reducing the amount of residual signals generated in the current coding block. Coefficients of the adaptive loop filter ALF applied are calculated as shown in FIG. 3. As shown in FIG. 3, the coefficient of the adaptive loop filter is designed such that the pixel value of the reconstructed image after the filtering has the same value as that of the original image. In this case, the adaptive loop filter performs filtering so that the weighted sum of the N -1 neighboring pixels and the current pixel value has an arbitrary filter coefficient N and the pixel value of the original image at the same position as the current pixel. do. Using the adaptive loop filtering equation of the pixels in a certain area z to perform the above operation, the determinant of FIG. 3 can be made and the inverse matrix satisfying the determinant of FIG. 3 is obtained to minimize distortion of the original image and the reconstructed image. The coefficient can be obtained. here

Adaptive loop filtering coefficients

Information about the region indication to which the adaptive loop filtering in is applied is represented in the bitstream.

을 기존의 율-왜곡 비용

보다 감소 시킨다. 또한, 최종적으로 해당 참조 영상 전체 영역에 걸쳐서 필터링을 적용한 후의 율-왜곡 비용과 적용하기 전의 율-왜곡 비용을 비교하여 필터링을 적용한 후의 율-왜곡 비용이 더 작을 때에만 필터링을 적용한다. 이 때 적응적 루프 필터링의 정의는 도 4와 같이 적응적 루프 필터링에 앞서 수행된 부호화 과정을 통해 결정된 CU 구조를 이용한다. HEVC 부호화기는 쿼드트리(quad tree) 형태로 나누어지는 CU구조를 부호화의 최소단위로 하여 화면간/화면내 예측, 변환, 그리고 양자화 등을 수행하여 최적의 율-왜곡 성능을 보이는 CU 구조를 결정한다. 그리고 본 발명에 이용되는 적응적 루프 필터는 부호화 과정을 통해 결정된 CU단위로 적응적 루프 필터를 적용하고 해당 CU의 필터링 전/후 율-왜곡 비용을 구하여 비교해보고 필터링 후의 율-왜곡 비용이 더 작을 때에만 해당 CU에 필터링을 적용하도록 한다. 따라서 도 4의 예시에 보인 것과 같이 CU단위로 적응적 루프 필터의 ON/OFF가 결정되고 각 CU 마다 적응적 루프 필터의 적용 여부를 표시하는 플래그(flag) 비트가 전송된다.As shown in the diagram above, when the reference image x (k ) is processed using the filter w _i , the rate-distortion cost between the reference image and the original image s ( k )

Existing rate-distortion cost

To reduce. Finally, the filtering is applied only when the rate-distortion cost after applying the filtering is compared by comparing the rate-distortion cost after applying the filtering over the entire region of the corresponding reference image. In this case, the definition of the adaptive loop filtering uses the CU structure determined through the encoding process performed before the adaptive loop filtering as shown in FIG. 4. The HEVC encoder determines the CU structure showing optimal rate-distortion performance by performing inter-screen / in-screen prediction, transformation, and quantization using a CU structure divided into quad tree as the minimum unit of coding. . In the adaptive loop filter used in the present invention, the adaptive loop filter is applied in units of CUs determined through the encoding process, and the comparison of the pre- and post-filtering rate-distortion costs of the corresponding CU is performed. Only apply filtering to the CU. Therefore, as shown in the example of FIG. 4, the ON / OFF of the adaptive loop filter is determined in CU units, and a flag bit indicating whether the adaptive loop filter is applied to each CU is transmitted.

As described above, according to the present invention, unlike the conventional method of independently encoding / decoding each view input video using one or more different video codecs in multi-view video encoding / decoding using heterogeneous codecs, Coding efficiency can be improved by first using coded / decoded information (motion vector prediction, adaptive loop filtering, etc.) in one codec among different heterogeneous codecs encoding input video. In addition, the reference encoding / decoding method between heterogeneous codecs according to the present invention has a technical concept that can be easily applied to heterogeneous codec combinations of two or more multi-view video inputs.

The methods according to embodiments of the present invention may be implemented in the form of a program instruction that can be executed through various computer systems and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. In addition, the above-described file system can be recorded in a computer-readable recording medium.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Claims (19)

delete In a method of encoding a multiview video using different heterogeneous codecs,
First encoding a first input video in one of the heterogeneous codecs; And
Encoding a second input video by using a result coded by the one codec with respect to the first input video in another codec of the heterogeneous codecs.
Lt; / RTI >
Encoding the second input video,
Encoding the second input video using a motion vector of a coded block in the first input video corresponding to the current coding block of the second input video.
Multi-view video encoding method between heterogeneous codecs, characterized in that the. In a method of encoding a multiview video using different heterogeneous codecs,
First encoding a first input video in one of the heterogeneous codecs; And
Encoding a second input video by using a result coded by the one codec with respect to the first input video in another codec of the heterogeneous codecs.
Lt; / RTI >
Encoding the second input video,
Encoding a current coding block in the second input video by using a motion vector of an already coded block in the first input video corresponding to a disparity vector of an already encoded neighboring block in the second input video. that
Multi-view video encoding method between heterogeneous codecs, characterized in that the. In a method of encoding a multiview video using different heterogeneous codecs,
First encoding a first input video in one of the heterogeneous codecs; And
Encoding a second input video by using a result coded by the one codec with respect to the first input video in another codec of the heterogeneous codecs.
Lt; / RTI >
Encoding the second input video,
Performing inter-view prediction encoding on the second input video by referring to the encoded result of the first input video to which adaptive loop filtering is applied.
Multi-view video encoding method between heterogeneous codecs, characterized in that the. In a method of encoding a multiview video using different heterogeneous codecs,
First encoding a first input video in one of the heterogeneous codecs; And
Encoding a second input video by using a result coded by the one codec with respect to the first input video in another codec of the heterogeneous codecs.
Lt; / RTI >
Encoding the second input video,
Encoding the second input video by using an adaptive loop filtering coefficient applied to the first input video and information indicating a region to which adaptive loop filtering is applied in the first input video.
Multi-view video encoding method between heterogeneous codecs, characterized in that the. A computer readable storage medium comprising instructions for controlling a computer system to encode a multiview video, the computer readable storage medium comprising:
The command includes:
First encoding the first input video in one of the heterogeneous codecs; And
Encoding a second input video by using a result coded by the one codec with respect to the first input video in another codec of the heterogeneous codecs.
Lt; / RTI >
Encoding the second input video,
Encoding the second input video using a motion vector of a coded block in the first input video corresponding to the current coding block of the second input video.
Wherein the computer system is controllable by the method. In the apparatus for encoding a multiview video using different heterogeneous codecs,
A first codec for encoding a first input video at one time point; And
A second codec for encoding a second input video at a different time point than the first input video by using a result coded first by the first codec with respect to the first input video.
/ RTI >
The second codec is,
Encoding the second input video using a motion vector of a coded block in the first input video corresponding to the current coding block of the second input video.
Multi-view video encoding apparatus between heterogeneous codecs. In the apparatus for encoding a multiview video using different heterogeneous codecs,
A first codec for encoding a first input video at one time point; And
A second codec for encoding a second input video at a different time point than the first input video by using a result coded first by the first codec with respect to the first input video.
/ RTI >
The second codec is,
Encoding a current coding block in the second input video by using a motion vector of an already coded block in the first input video corresponding to a disparity vector of an already encoded neighboring block in the second input video. that
Multi-view video encoding apparatus between heterogeneous codecs. In the apparatus for encoding a multiview video using different heterogeneous codecs,
A first codec for encoding a first input video at one time point; And
A second codec for encoding a second input video at a different time point than the first input video by using a result coded first by the first codec with respect to the first input video.
/ RTI >
The second codec is,
Performing inter-view prediction encoding on the second input video by referring to the encoded result of the first input video to which adaptive loop filtering is applied.
Multi-view video encoding apparatus between heterogeneous codecs. In the apparatus for encoding a multiview video using different heterogeneous codecs,
A first codec for encoding a first input video at one time point; And
A second codec for encoding a second input video at a different time point than the first input video by using a result coded first by the first codec with respect to the first input video.
/ RTI >
The second codec is,
Encoding the second input video by using an adaptive loop filtering coefficient applied to the first input video and information indicating a region to which adaptive loop filtering is applied in the first input video.
Multi-view video encoding apparatus between heterogeneous codecs. In a method of decoding a multiview video using different heterogeneous codecs,
First decoding a first input video in one of the heterogeneous codecs; And
Decoding a second input video using a result decoded first by the one codec with respect to the first input video by another codec of the heterogeneous codecs
Lt; / RTI >
Decoding the second input video,
Decoding the second input video by using a motion vector of the decoded block in the first input video corresponding to the current decoding block of the second input video.
Multi-view video decoding method between heterogeneous codecs. In a method of decoding a multiview video using different heterogeneous codecs,
First decoding a first input video in one of the heterogeneous codecs; And
Decoding a second input video using a result decoded first by the one codec with respect to the first input video by another codec of the heterogeneous codecs
Lt; / RTI >
Decoding the second input video,
Decoding a current decoding block in the second input video by using a motion vector of an already decoded block in the first input video corresponding to a disparity vector of a previously decoded neighboring block in the second input video. that
Multi-view video decoding method between heterogeneous codecs. In a method of decoding a multiview video using different heterogeneous codecs,
First decoding a first input video in one of the heterogeneous codecs; And
Decoding a second input video using a result decoded first by the one codec with respect to the first input video by another codec of the heterogeneous codecs
Lt; / RTI >
Decoding the second input video,
Performing inter-view prediction decoding on the second input video by referring to the decoded result of the first input video to which adaptive loop filtering is applied.
Multi-view video decoding method between heterogeneous codecs. In a method of decoding a multiview video using different heterogeneous codecs,
First decoding a first input video in one of the heterogeneous codecs; And
Decoding a second input video using a result decoded first by the one codec with respect to the first input video by another codec of the heterogeneous codecs
Lt; / RTI >
Decoding the second input video,
Decoding the second input video by using an adaptive loop filtering coefficient applied to the first input video and information indicating a region to which adaptive loop filtering is applied in the first input video.
Multi-view video decoding method between heterogeneous codecs. A computer readable storage medium comprising instructions for controlling a computer system to decode a multiview video, the computer readable storage medium comprising:
The command includes:
First decoding the first input video in one of the heterogeneous codecs; And
Decoding a second input video using a result decoded first by the one codec with respect to the first input video by another codec of the heterogeneous codecs
Lt; / RTI >
Decoding the second input video,
Decoding the second input video by using a motion vector of the decoded block in the first input video corresponding to the current decoding block of the second input video.
Wherein the computer system is controllable by the method. An apparatus for decoding a multiview video using different heterogeneous codecs,
A first codec for decoding the first input video at one time; And
A second codec that decodes a second input video at a different time point than the first input video by using a result decoded first by the first codec with respect to the first input video
/ RTI >
The second codec is,
Decoding the second input video by using a motion vector of the decoded block in the first input video corresponding to the current decoding block of the second input video.
Multi-view video decoding apparatus between heterogeneous codecs. An apparatus for decoding a multiview video using different heterogeneous codecs,
A first codec for decoding the first input video at one time; And
A second codec that decodes a second input video at a different time point than the first input video by using a result decoded first by the first codec with respect to the first input video
/ RTI >
The second codec is,
Decoding a current decoding block in the second input video by using a motion vector of an already decoded block in the first input video corresponding to a disparity vector of a previously decoded neighboring block in the second input video. that
Multi-view video decoding apparatus between heterogeneous codecs. An apparatus for decoding a multiview video using different heterogeneous codecs,
A first codec for decoding the first input video at one time; And
A second codec that decodes a second input video at a different time point than the first input video by using a result decoded first by the first codec with respect to the first input video
/ RTI >
The second codec is,
Performing inter-view prediction decoding on the second input video by referring to the decoded result of the first input video to which adaptive loop filtering is applied.
Multi-view video decoding apparatus between heterogeneous codecs. An apparatus for decoding a multiview video using different heterogeneous codecs,
A first codec for decoding the first input video at one time; And
A second codec that decodes a second input video at a different time point than the first input video by using a result decoded first by the first codec with respect to the first input video
/ RTI >
The second codec is,
Decoding the second input video by using an adaptive loop filtering coefficient applied to the first input video and information indicating a region to which adaptive loop filtering is applied in the first input video.
Multi-view video decoding apparatus between heterogeneous codecs.

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