KR20070098428A - Method and apparatus for decoding/encoding a video signal - Google Patents

Abstract

A method and an apparatus for decoding/encoding video signals are provided to offer various prediction types among view points. A slice type extracting unit(31) extracts a type of a slice including a current macro block. A prediction mode extracting unit(33) extracts a macro block prediction mode for recovering the current macro block. A decoding unit(35) decodes the current macro block according to the extracted macro block prediction mode.

Description

Method and apparatus for decoding / encoding video signal {Method and Apparatus for decoding / encoding a video signal}

1 is a diagram illustrating a multiview image encoding and decoding system according to the present invention.

2 is a diagram illustrating a prediction structure between pictures in multi-view video coding according to the present invention.

3 is a block diagram of an embodiment of a video signal decoding apparatus according to the present invention.

FIG. 4 is a flowchart illustrating a video signal decoding method according to the present invention performed in the apparatus shown in FIG. 3.

5 is a diagram illustrating an embodiment of a macroblock prediction mode according to the present invention.

6 (a) and 6 (b) are diagrams showing syntax to which a slice type and a macroblock prediction mode according to the present invention are applied.

7 (a), 7 (b) and 7 (c) are diagrams illustrating embodiments to which the slice type of FIG. 6 (b) is applied.

8 is a diagram illustrating various embodiments of a slice type included in a slice type of 6 (b).

FIG. 9 is a diagram illustrating an embodiment of a macroblock that is allowed in a mixed slice type (Mixed) by mixed prediction according to the present invention.

 FIG. 10 is a diagram illustrating an embodiment of a macroblock type of a macroblock present in a mixed slice (Mixed) by mixed prediction according to the present invention.

11 is a block diagram of an embodiment of a video signal encoding apparatus according to the present invention.

FIG. 12 is a flowchart for describing a video signal decoding method according to the present invention performed in the apparatus shown in FIG. 11.

The present invention relates to a video signal decoding method and apparatus, and more particularly, to a video signal decoding method and apparatus by intra-view prediction or inter-view prediction.

The mainstream video broadcasting image is a single view image acquired with one camera. Multi-view video, on the other hand, is a three-dimensional (3D) image processing method that geometrically corrects images captured by one or more cameras and provides users with various viewpoints in various directions through spatial synthesis. It is a field. Multi-view video can increase the freedom of view for the user, and has a feature that includes a larger area than the image area that can be acquired using a single camera.

Since the multi-view video image has a high correlation between viewpoints, redundant information may be removed through spatial prediction between viewpoints. Therefore, various prediction methods for prediction between viewpoints are needed.

An object of the present invention is to provide a video signal decoding method and apparatus for providing various prediction methods between viewpoints.

Another object of the present invention is to provide a video signal encoding method and apparatus having excellent encoding performance by various prediction methods between viewpoints.

In order to achieve the above object, the video signal decoding method according to the present invention extracts a slice type of a slice including a current macroblock, and the current macroblock according to a macroblock prediction mode for reconstructing the current macroblock. And decoding the slice type, wherein the slice type includes information on inter-view prediction for at least the current macroblock.

In addition, to achieve the above object, the video signal decoding apparatus according to the present invention comprises a slice type extractor for extracting a slice type of a slice including a current macroblock, and a macroblock prediction mode for reconstructing the current macroblock. And a decoding unit to decode the current macroblock according to the extracted prediction mode extractor and the extracted macroblock prediction mode.

In order to achieve the above object, the video signal encoding method according to the present invention comprises the steps of: (a) determining a first macroblock type for intra-view prediction and a second macroblock type for inter-view prediction; Generating a first macroblock having a first macroblock type and a second macroblock having the second macroblock type; and (c) a third macroblock using the first macroblock and the second macroblock. Generating a block and (d) encoding the macroblock type of the current macroblock and the macroblock prediction mode (mb_pred_mode) by comparing encoding efficiency of the first macroblock, the second macroblock, and the third macroblock; Is made of.

In addition, to achieve the above object, the video signal encoding apparatus according to the present invention includes a macroblock type determination unit for determining a first macroblock type for intra-view prediction and a second macroblock type for inter-view prediction; A macro for generating a first macroblock having a first macroblock type and a second macroblock having the second macroblock type, and generating a third macroblock using the first macroblock and the second macroblock. And a block generator and an encoder for encoding the macroblock type and the macroblock prediction mode of the current macroblock by comparing encoding efficiency of the first macroblock, the second macroblock, and the third macroblock.

Hereinafter, a configuration and an operation of a video signal decoding / encoding apparatus according to the present invention and an embodiment of a method performed in the apparatus will be described with reference to the accompanying drawings. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

1 is a diagram illustrating a multi-view sequence encoding and decoding system according to the present invention.

As shown in FIG. 1, the multi-view image encoding system to which the present invention is applied includes a multi-view image generator 10, a preprocessing unit 20, and an encoding unit 30. In addition, the decoding system includes an extractor 40, an extractor 50, a decoding unit, a post-processing unit 60, and a display unit 70.

The multi-view image generator 10 is provided with an image obtaining apparatus (for example, cameras # 1 to #N) corresponding to the number of multi-views to acquire independent images for each viewpoint. When the multiview image data is input, the preprocessing unit 20 performs a function of increasing the correlation between the multiview image data through a preprocessing process while solving noise removal and imbalancing problems. The encoder 30 includes a motion estimator, a motion compensator, and a disparity estimator, a disparity compensator, an illumination compensator, a bit rate control, and a residual image encoder. do. The encoding unit 30 may apply a generally known method.

The extractor 40 functions to extract only a bitstream corresponding to a desired view from the transmitted MVC bitstream. The extractor can view the header and optionally decode only the desired time point. In addition, view scalability may be implemented by extracting only a bitstream corresponding to a desired view using a view identifier that distinguishes a view of a picture. Since MVC must be fully compatible with H.264 / AVC, it is necessary to decode only certain views that are compatible with H.264 / AVC. In this case, a view identifier that distinguishes a view of the picture may be used to decode only compatible views. The bitstream extracted through the extractor 40 is transmitted to the decoding unit 50. The decoder 50 includes a motion compensator, an illumination compensator, a weight predictor, a deblocking filter, and the like. The decoding unit 50 receives the bitstream encoded by the above-described method, and decodes it in reverse. The decoded sequence is further divided into a plurality of sequences. In this case, the view identifier may be used to separate the view for each view, such as an image state obtained by several cameras. In addition, the post-processing unit 60 performs a function of increasing the reliability and resolution of the decoded data. Finally, the display unit 70 provides the decoded data to the user in various ways depending on the function of the display, in particular, the ability to process a multi-view image. For example, it is a 2D display 71 that provides only a planar two-dimensional image, a stereo type display 73 that provides two views as a stereoscopic image, or a stereoscopic image of M views (2 <M). The display 75 may be provided.

2 is a diagram illustrating a prediction structure between pictures in multi-view video coding according to the present invention.

As illustrated in FIG. 2, T0 to T100 on the horizontal axis represent frames according to time, and S0 to S100 on the vertical axis represent frames according to viewpoints, respectively. For example, pictures in T0 refer to images taken by different cameras in the same time zone (T0), and pictures in S0 refer to images in different time zones taken by one camera. In addition, the arrows in the drawing indicate the prediction direction and the order of each picture. For example, a P0 picture at S2 time point in the T0 time zone is a picture predicted from I0, and the P0 picture is also at S4 time point in the TO time zone. It becomes a reference picture of another P0 picture. It is also a reference picture of the B1 and B2 pictures in the T4 and T2 time zones at the time S2.

As such, when prediction encoding is performed using pictures that are in the same time zone as the current picture but at different views, an identifier for distinguishing the viewpoints between the pictures is required. Therefore, an identifier indicating a viewpoint of an arbitrary picture is defined as a view identifier. For example, the P0 picture at S4 in the TO time zone is predictively encoded by referring to the P0 picture at S2 in the same time zone. In this case, when referring to the P0 picture at the S2 viewpoint, more efficient predictive encoding can be performed by using the view identifier of the P0 picture at the S2 viewpoint.

3 is a block diagram of an embodiment of a video signal decoding apparatus according to the present invention, which is composed of a slice type extractor 31, a prediction mode extractor 33, and a decoder 35.

4 is a flowchart illustrating a video signal decoding method according to the present invention performed in the apparatus shown in FIG. 3. The method of extracting a slice type (S41), and decoding a current macroblock according to a macroblock prediction mode. Step S43 is made.

First, the prediction method used in the present invention will be described to help understanding of the present invention. It can be divided into intra-view prediction or inter-view prediction, depending on whether it refers to a picture at the same view as the picture containing the current macroblock or to a picture at another view. have. In addition, the intra-view prediction may be referred to as the same prediction method as the conventional temporal prediction.

According to the present invention, first, the slice type extracting unit 31 extracts the slice type of the slice including the current macroblock (S41).

Here, in one embodiment, two types of slice types may be a slice type through intra-view prediction and a slice type through inter-view prediction. To this end, the present invention defines a slice type (view_slice_type) by inter-view prediction. In addition, the slice type by intra-view prediction and the slice type by inter-view prediction may be an I slice (I_SLICE) type, a P slice (P_SLICE) type, or a B slice type (B_SLICE), respectively. For example, if a particular slice is a 'slice_type' is a B slice and a 'view_slice_type' is a P slice, the macroblocks in the particular slice are decoded by a B slice (B_SLICE) coding method in an in-view direction or a temporal direction. Can be decoded using a P slice (P_SLICE) coding scheme.

On the other hand, the slice type in another embodiment includes a P slice type (VP) by inter-view prediction, a B slice type (VB) by inter-view prediction, and a mixed slice type (Mixed) by prediction mixed with both predictions. can do.

Here, P slice type by inter-view prediction means that each macroblock or macroblock partition included in a slice is predicted from one picture in a current view or in a different view. The case is predicted from the picture. Next, the B slice type by inter-view prediction means that each macroblock or macroblock partition included in a slice is predicted from one picture or two pictures at the current view, or one picture at a different view or each The case is predicted from two pictures at different time points. Finally, a mixed slice type based on a prediction in which both predictions are mixed means that each macroblock or macroblock partition included in a slice is predicted from one picture or two pictures at a current time point, or one at a different time point. Is predicted from a picture of or from two pictures, each at a different time, or from a picture or two pictures at a current time and from a picture at a different time, or from two pictures at different times. Say. In other words, the reference picture and the allowed macroblock type are different for each slice type, which will be described in detail with reference to FIGS. 8 and 9.

In addition, the syntax of the slice type embodiments described above will be described in detail with reference to FIG. 6.

Next, the prediction mode extractor 33 is a macroblock free indicating whether the current macroblock is a macroblock by intra-view prediction, a macroblock by inter-view prediction, or a macroblock by mixed prediction. Extract the diction mode (S43). To this end, the present invention defines a macroblock prediction mode (mb_pred_mode). Meanwhile, an embodiment of the macroblock prediction mode will be described in detail with reference to FIGS. 5 and 6.

Finally, the decoder 35 decodes the current macroblock according to the macroblock prediction mode for reconstructing the current macroblock (S43). Here, according to the present invention, the current macroblock may be decoded according to the macroblock type of the current macroblock determined from the macroblock type information for reconstructing the current macroblock. In addition, the macroblock type may be determined according to the macroblock prediction mode and the slice type.

According to the present invention, when the macroblock prediction mode is a mode related to intra-view prediction, the macroblock type is determined according to the slice type by intra-view prediction, and according to the determined macroblock type by intra-view prediction. Decode the current macroblock. When the macroblock prediction mode is a mode related to inter-view prediction, the macroblock type is determined according to the slice type by inter-view prediction, and the current macroblock is determined by inter-view prediction according to the determined macroblock type. Decode In addition, when the macroblock prediction mode is a macroblock by prediction in which both predictions are mixed, the macroblock type is determined according to the slice type by intra-view prediction and the slice type by inter-view prediction, respectively. The current macroblock is decoded by the prediction in which both predictions are mixed according to the macroblock type.

Here, the macroblock type depends on the macroblock prediction mode and the slice type. In other words, the prediction method to be used for the macroblock type can be known by the macroblock prediction mode, and the macroblock type is determined from the macroblock type information by the slice type according to the prediction method. For example, when the macroblock prediction mode is a mode related to inter-view prediction, the macroblock type is determined from a macroblock table of slice types (I, P, B) corresponding to the slice type (view_slice_type) by inter-view prediction. Can be determined. The relationship between the macroblock prediction mode and the macroblock type will be described in detail with reference to FIGS. 5 and 6.

5 is a diagram illustrating an embodiment of a macroblock prediction mode according to the present invention.

FIG. 5 (a) is a table corresponding to an embodiment of the macroblock prediction mode (mb_pred_mode) according to the present invention, and only intra-view prediction, that is, temporal prediction, for a macroblock. If only the value of 'mb_pred_mode' is used, '0' is assigned. If only inter-view prediction is used for the macroblock, the value of 'mb_pred_mode' is assigned '1'. If both my prediction and inter-view prediction are used, the value of 'mb_pred_mode' is assigned '2'. Here, when the value of 'mb_pred_mode' is '1', that is, when the inter-view prediction is indicated, the view direction List0 (ViewList0) or the view direction List1 (ViewList1) is used as the reference picture list (List) for the inter-view prediction. define.

FIG. 5 (b) is a diagram illustrating a relationship between a macroblock prediction mode and a macroblock type according to the present invention. If the value of 'mb_pred_mode' is '0', only temporal prediction is used, and in-view prediction The macroblock type is determined according to the slice type (slice_type). When the value of 'mb_pred_mode' is '1', only inter-view prediction is used, and the macroblock type is determined according to the slice type (view_slice_type) by the inter-view prediction. When the value of 'mb_pred_mode' is '2', a prediction in which time- and intra-view prediction is mixed is used, and two types are determined according to slice type (slice_type) by intra-view prediction and slice type (view_slice_type) by inter-view prediction. The macroblock type is determined. In other words, the prediction method used for the macroblock and the slice type to be referred to are determined by the macroblock prediction mode, and the macroblock type is determined according to the slice type.

6 (a) and 6 (b) are diagrams showing syntax to which a slice type and a macroblock prediction mode according to the present invention are applied.

FIG. 6 (a) shows syntax to which 'slice_type' and 'view_slice_type' as a slice type and 'mb_pred_mode' are applied as a macroblock prediction mode. According to the present invention, 'slice_type' means a slice type by intra-view prediction, and 'view_slice_type' means a slice type by inter-view prediction. In addition, each slice type may be an I slice type or a P slice type or a B slice type. When the value of 'mb_pred_mode' is '0' or '1', only one macroblock type is determined. When the value of 'mb_pred_mode' is '2', one more macroblock type is determined. In other words, the syntax shown in FIG. 6 (a) is 'view_slice_type' added to extend the existing slice types I, P, and B in multi-view video coding.

FIG. 6B is a syntax to which 'slice_type' as a slice type and 'mb_pred_mode' as a 'macroblock prediction mode' are applied. According to the present invention, 'slice_type' includes a slice type (VP) based on inter-view prediction, a B slice type (VB) based on inter-view prediction, and a mixed slice type (Mixed) based on mixed prediction. When the value of 'mb_pred_mode' is '0' or '1', only one macroblock type is determined. However, when the value of 'mb_pred_mode' is '2', one more macroblock type is determined. In this case, the slice type is present in a slice header, which will be described in detail with reference to FIG. 7. In other words, the syntax shown in FIG. 6B further includes VP, VB, and mixed slice types in the existing slice type (slice_type).

7 (a), 7 (b) and 7 (c) are diagrams illustrating embodiments to which the slice type of FIG. 6 (b) is applied.

FIG. 7 (a) shows that a slice type (VP) based on inter-view prediction, a B slice type (VB) based on inter-view prediction, and a mixed slice type (Mixed) based on prediction mixed with both predictions exist in the slice header. Means that. In other words, the slice type (VP, VB, Mixed) according to the present invention is added to the slice type existing in the existing slice header.

7B shows a multi-view video coding method of a slice type (VP) by inter-view prediction, a B slice type (VB) by inter-view prediction, and a mixed slice type (Mixed) by mixed prediction. It exists in the slice header for multi-view video coding (MVC). In other words, the slice type according to the present invention is newly defined in the slice header for multi-view video coding.

FIG. 7C shows scalable video coding of a slice type (VP) by inter-view prediction, a B slice type (VB) by inter-view prediction, and a mixed slice type (Mixed) by mixed prediction. It exists in the slice header for scalable video coding (SVC). In other words, the slice type according to the present invention is added to the slice type present in the slice header for scalable video coding.

8 is a diagram illustrating various embodiments of a slice type included in the slice type of FIG. 6 (b).

Since FIG. 8 (a) is predicted from one picture at different viewpoints, it is a slice type VP by inter-view prediction, and FIG. 8 (b) is predicted from two pictures at different viewpoints. It becomes the B slice type (VB) by inter-view prediction. 8 (c) to 8 (d) are predictions from one picture or two pictures at a current view and one picture at a different view, or two pictures at different views, so that both predictions Mixed slice type (Mixed) by mixed prediction.

FIG. 9 is a diagram illustrating an embodiment of a macroblock allowed in the slice type of FIG. 6 (b). As shown, the P slice type VP by inter-view prediction includes a macroblock P or another viewpoint predicted from an intra macroblock I or a picture in a current view. Macroblocks (VPs) that are predicted from one picture in the (different view) are allowed. Next, the B slice type (VP) by inter-view prediction includes an intra macroblock (I) or a macroblock (P or B) predicted from one picture or two pictures at the current view or one at another view. A macroblock (VP or VB) predicted from a picture of or from two pictures at different times is allowed. Finally, a mixed slice type (Mixed) by a prediction in which both predictions are mixed includes an intra macroblock (I) or a macroblock (P or B) predicted from one picture or two pictures at the present time or another. A macroblock (VP or VB) predicted from one picture at a view or two pictures at different views, or one picture or two pictures at the current view and one picture at a different view, or different Macroblocks that are predicted from two pictures at the time of view are allowed.

FIG. 10 is a diagram illustrating an embodiment of a macroblock type of a macroblock present in a mixed slice (Mixed) by mixed prediction according to the present invention.

In particular, FIGS. 10A and 10B illustrate a configuration method of a macroblock type (mb_type) and a sub macroblock type (sub_mb_type) of macroblocks present in a mixed slice. 10 (c) and 10 (d) show binary representations and actual prediction directions of prediction directions of macroblocks present in the mixed slice.

According to the present invention, the macroblock type (mb_type) is made in consideration of both the size (Partition_size) of the macroblock partition and the prediction direction (Direction) of the macroblock partition. The sub macroblock type sub_mb_type is created in consideration of both the size of the sub macroblock partition Sub_Partition_Size and the prediction direction Sub_Direction of each sub macroblock partition.

As shown in FIG. 10 (a), Direction0 and Direction1 mean the prediction direction of the first macroblock partition and the prediction direction of the second macroblock partition, respectively. That is, in case of an 8 × 16 macroblock, Direction0 means a prediction direction for a left 8 × 16 macroblock partition, and Direction1 means a prediction direction of a right macroblock partition.

Here, if the configuration principle of the macroblock type (mb_type) is described in detail, the first 2 bits means the partition size (Patition_Size) of the macroblock, and a value between 0 and 3 is possible. The 4 bits after the first 2 bits indicate the direction when the macroblock is divided into partitions. For example, in the case of a 16x16 macroblock, only the first 2 bits are followed by 4 bits indicating the prediction direction of the macroblock. In the case of a 16x8 macroblock, 4 bits after the first 2 bits mean the prediction direction (Direction0) of the first partition, followed by another 4 bits to indicate the prediction direction of the second partition (Direction1). In the case of 8 × 16 macroblocks, 8 bits are added after the first 2 bits, and 4 bits after the first 2 bits indicate the prediction direction of the first partition, and 4 bits after the first means the prediction direction of the second partition.

As shown in FIG. 10 (b), the prediction direction Sub_Direction of the sub macroblock partition is used in the same manner as the prediction direction of the macroblock partition of FIG. 10 (a).

 Here, when the configuration principle of the sub macroblock type (sub_mb_type) is described in detail, each of the first 2 bits means a partition size (Partition_Size) of the corresponding macroblock and a partition size (Sub_Partition_Size) of the sub macroblock of the macroblock. Values between -3 are possible. The first 4 bits after each 2 bits indicate the prediction direction (Sub_Direction) when the macroblock is divided into sub macroblock partitions. For example, if the partition size of the macroblock (Partition_Size) is 8 × 8 and the partition size (Sub_Partition_Size) of the sub macroblock block is 4 × 8, the first 2 bits are 3 and the second 2 bits are 2 values. The next 4 bits indicate the prediction direction for the left 4x8 block among the two 4x8 blocks, and the next 4 bits indicate the prediction direction for the right 4x8 block.

As shown in FIG. 10 (c), the prediction direction of the macroblock is 4 bits, and refers to the pictures of the left (L), top (T), and right (R) lower (B) positions of the current picture. In some cases, it can be seen that each binary representation is '1'.

As shown in FIG. 10 (d), for example, when the prediction direction is image T, reference is made to the picture located above in the view direction of the current picture, and when the prediction direction is all directions LTRB. It can be seen that the pictures are referenced in all directions of up, down, left and right directions of the current picture.

11 is a block diagram of an embodiment of a video signal encoding apparatus according to the present invention, and includes a macroblock type determiner 110, a macroblock generator 112, and an encoder 114.

12 is a flowchart illustrating a video signal decoding method according to the present invention performed in the apparatus shown in FIG. 11, wherein a first macroblock type for intra-view prediction and a second macroblock type for inter-view prediction are determined. Step S120, generating a first macroblock having a first macroblock type and a second macroblock having a second macroblock type, in step S122, using a first macroblock and a second macroblock, Generating three macroblocks (S124) and encoding the macroblock type and macroblock prediction mode of the current macroblock (S126).

According to the present invention, first, the macroblock type determination unit 110 determines a first macroblock type for intra-view prediction and a second macroblock type for inter-view prediction (S120).

Next, the macroblock generation unit 112 generates a first macroblock having a first macroblock type and a second macroblock having a second macroblock (S122), and generates the first macroblock and the second macroblock. By using the third macroblock to generate (S124). Here, the third macroblock is generated by an average value of the first macroblock and the second macroblock.

Finally, the encoder 114 encodes the macroblock type (mb_type) and the macroblock prediction mode (mb_pred_mode) of the current macroblock by comparing the encoding efficiency of the first macroblock, the second macroblock, and the third macroblock. (S126). Here, various methods may be applied to a method of measuring encoding efficiency, but there is a method using a rate-distortion cost. The RD cost is calculated using two components, the number of coding bits generated when the corresponding block is encoded and a distortion value representing an error between the actual video.

According to the present invention, the method for determining the first macroblock type and the second macroblock type may determine a macroblock type in which the RD cost described above has a minimum value. For example, the macroblock type having the lowest RD cost among the macroblock types by intra-view prediction becomes the first macroblock type, and the macroblock having the minimum RD cost among the macroblock types by inter-view prediction. The type becomes the second macroblock type.

In the encoding of the macroblock type and the macroblock prediction mode, first, a small value is obtained by comparing the RD cost of the first macroblock and the RD cost of the second macroblock type. Next, the RD cost of the third macroblock is obtained. Finally, the RD cost obtained above is compared with the RD cost of the third macroblock to encode the macroblock type and the macroblock prediction mode of the current macroblock.

If the RD cost obtained above is greater than the RD cost of the third macroblock, the macroblock type is a macroblock type corresponding to the RD cost obtained above. For example, when the RD cost of the first macroblock is smaller than the RD cost of the first macroblock and the RD cost of the second macroblock, the first macroblock type, which is the macroblock type of the first macroblock, It becomes a macroblock type. In addition, the macroblock prediction mode is a prediction method of the macroblock corresponding to the RD cost obtained above. For example, when the RD cost of the second macroblock is small among the RD cost of the first macroblock and the RD cost of the second macroblock, the inter-view prediction method that is the prediction method of the second macroblock is the macroblock of the current macroblock. It will be in Prediction mode

On the other hand, when the RD cost obtained above is less than the RD cost of the third macroblock, the macroblock type is a macroblock type corresponding to the first macroblock and the second macroblock. In other words, two macroblock types, that is, the macroblock type of the macroblock by intra-view prediction and the macroblock type of the macroblock by inter-view prediction, become the macroblock type of the current macroblock. In addition, the macroblock prediction mode is a prediction method in which intra-view prediction and inter-view prediction are mixed.

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

As described above, the video signal decoding / encoding method and apparatus according to the present invention provide various prediction schemes between viewpoints and information between the viewpoints by information such as slice type or macroblock type or macroblock prediction mode. Since redundancy can be excluded, performance has an effect of increasing encoding / decoding efficiency.

Claims (24)

In the video signal decoding method, Extracting a slice type of a slice including the current macroblock; Decoding the current macroblock according to a macroblock prediction mode for reconstructing the current macroblock, The slice type includes at least information about inter-view prediction for the current macroblock. The method of claim 1, wherein decoding the current macroblock comprises: And decoding the current macroblock according to the macroblock type of the current macroblock determined from macroblock type information for reconstructing the current macroblock. The method of claim 2, wherein the video signal decoding method is And determining the macroblock type according to the macroblock prediction mode and the slice type. The method of claim 3, wherein the slice type And a slice type by the intra-view prediction and a slice type by the inter-view prediction. 5. The method of claim 4, wherein the slice type by intra-view prediction and the slice type by inter-view prediction include an I slice type, a P slice type, or a B slice type, respectively. The method of claim 5, wherein the video signal decoding method When the macroblock prediction mode is a mode related to the intra-view prediction, the macroblock type is determined according to the slice type by the intra-view prediction, and the current macro is determined by the intra-view prediction according to the determined macroblock type. A video signal decoding method comprising decoding a block. The method of claim 5, wherein the video signal decoding method When the macroblock prediction mode is a mode related to the inter-view prediction, the macroblock type is determined according to the slice type by the inter-view prediction, and the current macro is determined by the inter-view prediction according to the determined macroblock type. A video signal decoding method comprising decoding a block. The method of claim 5, wherein the video signal decoding method When the macroblock prediction mode is a mode in which both predictions are mixed, the macroblock type is respectively determined according to the slice type by the intra-view prediction and the slice type by the inter-view prediction, and each determined macro And decoding the current macroblock by the prediction in which the two predictions are mixed according to the block type. The method of claim 3, wherein the slice type is present in a slice header, And a P slice type by the inter-view prediction, a B slice type by the inter-view prediction, and a mixed slice type by the prediction in which the quantity prediction is mixed. The method of claim 9, wherein the slice type And a slice header for multi-view video coding or a slice header for scalable video coding. 10. The method of claim 9, wherein the P slice type by the inter-view prediction is And a macroblock predicted from one picture at another point in time. 10. The method of claim 9, wherein the B slice type by the inter-view prediction is And a macroblock predicted from one picture at different viewpoints or a macroblock predicted from two pictures at different viewpoints. The method of claim 9, wherein the mixed slice type Macroblock type predicted from one picture at different viewpoints, or macroblock type predicted from two pictures at different viewpoints each, or one picture or two pictures at the current viewpoint and one at another viewpoint And a macroblock type predicted from a picture of or from two pictures at different time points. The method of claim 13, wherein the macroblock type is Video signal decoding method using the size of the macroblock partition and the prediction direction of the macroblock partition. In the video signal encoding method, (a) determining a first macroblock type for in-view prediction and a second macroblock type for inter-view prediction; (b) generating a first macroblock having the first macroblock type and a second macroblock having the second macroblock type; (c) generating a third macroblock using the first macroblock and the second macroblock; And and (d) comparing the encoding efficiency of the first macroblock, the second macroblock, and the third macroblock to encode the macroblock type and the macroblock prediction mode of the current macroblock. Encoding Method. The method of claim 15, wherein in step (d) The method of measuring invalidation efficiency uses a rate-distortion cost. The method of claim 16, wherein in step (a) The method for determining the first and second macroblock types may include determining a macroblock type having a minimum RD cost. 18. The method of claim 17, wherein step (d) (e) comparing the RD cost of the first macroblock type with the RD cost of the second macroblock type to obtain a small value; (f) obtaining an RD cost of the third macroblock; And (g) comparing the RD cost obtained in step (e) with the RD cost obtained in step (f) to encode a macroblock type and a macroblock prediction mode of the current macroblock. Video signal encoding method. 19. The method according to claim 18, wherein in step (g) When the RD cost obtained in step (e) is greater than or equal to the RD cost obtained in step (f), the macroblock type is a macroblock type corresponding to the minimum value of the RD cost obtained in step (a). Video signal encoding method. 20. The method of claim 19, wherein the macroblock prediction mode is The video signal encoding method, characterized in that the prediction method of the macroblock corresponding to the RD cost obtained in the step (e). 19. The method according to claim 18, wherein in step (g) When the RD cost obtained in step (e) is less than the RD cost obtained in step (f), the macroblock type is a first macroblock type and a second macro corresponding to the first macroblock and the second macroblock. A video signal encoding method characterized by being a block type. The method of claim 21, wherein the macroblock prediction mode is The video signal encoding method of claim 2, wherein the amount prediction is a mixed prediction method. In the video signal decoding apparatus, A slice type extracting unit extracting a slice type of a slice including a current macroblock; A prediction mode extraction unit for extracting a macroblock prediction mode for restoring the current macroblock; And a decoder which decodes the current macroblock according to the extracted macroblock prediction mode. In the video signal encoding apparatus, A macroblock type determination unit that determines a first macroblock type for prediction within a view and a second macroblock type for prediction between views; Generating a first macroblock having the first macroblock type and a second macroblock having the second macroblock type, and generating a third macroblock using the first macroblock and the second macroblock; A macroblock generator; And And an encoding unit for encoding the macroblock type and the macroblock prediction mode of the current macroblock by comparing encoding efficiency of the first macroblock, the second macroblock, and the third macroblock.

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