WO2016199574A1

WO2016199574A1 - Image processing apparatus and image processing method

Info

Publication number: WO2016199574A1
Application number: PCT/JP2016/065421
Authority: WO
Inventors: 央二中神
Original assignee: ソニー株式会社
Priority date: 2015-06-08
Filing date: 2016-05-25
Publication date: 2016-12-15

Abstract

The present disclosure relates to an image processing apparatus and an image processing method for enabling the reduction of load in a decoding process. A generation unit sets, in an image encoded data, an IBC slice indicating that an intra BC prediction, which is a motion prediction using a correlation in a screen, has been used to encode the image. The present disclosure can be applied to an encoding apparatus or the like that performs, by use of, for example, a scheme compliant with High Efficiency Video Coding (HEVC), an intra refreshing in which the pictures are P-pictures and in which inter-slices are coexistent with intra-slices, for which intra predictions or intra BC predictions are performed, in the pictures.

Description

Image processing apparatus and image processing method

The present disclosure relates to an image processing device and an image processing method, and more particularly, to an image processing device and an image processing method that can reduce a load of decoding processing.

In recent years, image information has been handled as digital data, and at that time, for the purpose of efficient transmission and storage of information, encoding is performed by orthogonal transform such as discrete cosine transform and motion compensation using redundancy unique to image information. An apparatus that compresses and encodes an image using a method is becoming widespread. Examples of this encoding method include MPEG (Moving Picture Experts Group) and H.264. H.264 / MPEG-4 Part 10 Advanced Video Coding (hereinafter referred to as H.264 / AVC or AVC / H.264).

And now H. It is called HEVC (High Efficiency Efficiency Video Video Coding) by JCTVC (Joint Collaboration Collaboration Team Video Video Coding), which is a joint standardization organization of ITU-T and ISO / IEC, with the aim of further improving coding efficiency from H.264 / AVC. Standardization of the encoding method is underway.

In HEVC, the range extension (HEVC Range Extension) has been studied to support high-end formats such as 4: 2: 2 and 4: 4: 4 color difference signal formats and screen content profiles. (For example, refer nonpatent literature 1).

By the way, IntraBlockCopy (Intra) BC) is a coding tool that performs prediction by performing motion compensation in the screen using the correlation in the screen. Intra BC is known as a tool that contributes to improving the coding efficiency of artificial images such as computer screens and CG images. Intra BC is not adopted for the above-described HEVC Range Extension extension, and technical studies are being continued with standardization of Screen Content Coding (SCC) extension (see, for example, Non-Patent Document 2).

In the standardization of the SCC extension, it is currently considered to share the transmission method of encoded data subjected to Intra BC prediction with the transmission method of encoded data subjected to inter prediction. That is, when Intra-BC prediction is performed, it is necessary to encode a motion vector by the same encoding method as in inter prediction and transmit it to the decoding side. Therefore, the slice type of a slice for which only Intra BC prediction is performed (hereinafter referred to as Intra BC slice) is set to a P slice or a B slice that is a slice type capable of performing inter prediction, and is included in the slice header. Transmission is under consideration.

Also, in the NAL (Network Abstraction Layer) header of the encoded data of each slice, a NAL unit type indicating whether or not the picture including the slice is an independently decodable picture is set.

For example, if all slices in a picture are intra slices that have been subjected to intra prediction or Intra BC prediction, the NAL unit type of each slice indicates that the picture that includes the slice is a picture that can be independently decoded. BLA_W_LP, RSV_IRAP_VCL23, and the like.

Therefore, even if the slice type of the Intra BC slice is other than an I slice that is a slice type for which only intra prediction that can be independently decoded is performed, the slice type is not an I slice before decoding depending on the NAL unit type. Can be recognized as an Intra で BC slice that can be decoded independently.

However, when encoding such as intra refreshing in which inter slices and intra slices capable of performing inter prediction in the same picture are performed, the NAL unit type of each slice is at least one in the picture including the slice. The information indicates that the slice is not independently decodable. Therefore, the NAL unit type cannot recognize whether each slice can be decoded independently.

Also, if a slice type other than I slice is set as the slice type of the Intra BC slice, it cannot be recognized whether each slice is a slice that can be decoded independently by the slice type. Therefore, it is necessary to perform the decoding process without recognizing whether each slice can be decoded independently, and the load of the decoding process is large.

The present disclosure has been made in view of such a situation, and is intended to reduce the load of decoding processing.

An image processing device according to a first aspect of the present disclosure includes a setting unit that sets prediction information indicating that an image has been encoded using motion prediction using correlation within a screen, in encoded data of the image. An image processing apparatus is provided.

The image processing method according to the first aspect of the present disclosure corresponds to the image processing apparatus according to the first aspect of the present disclosure.

In the first aspect of the present disclosure, prediction information indicating that an image has been encoded using motion prediction using correlation within a screen is set in the encoded data of the image.

The image processing device according to the second aspect of the present disclosure decodes the encoded data of the image based on prediction information indicating that the image is encoded using motion prediction using correlation within the screen. An image processing apparatus including a unit.

The image processing method according to the second aspect of the present disclosure corresponds to the image processing apparatus according to the first aspect of the present disclosure.

In the second aspect of the present disclosure, the encoded data of the image is decoded based on prediction information indicating that the image has been encoded using motion prediction using correlation within the screen.

Note that the image processing apparatuses according to the first and second aspects of the present disclosure can be realized by causing a computer to execute a program.

In order to realize the image processing apparatuses according to the first and second aspects of the present disclosure, a program to be executed by a computer is provided by being transmitted through a transmission medium or by being recorded on a recording medium. be able to.

The image processing apparatuses according to the first and second aspects of the present disclosure may be independent apparatuses or may be internal blocks that constitute one apparatus.

According to the first aspect of the present disclosure, it is possible to reduce the load of decoding processing.

Also, according to the second aspect of the present disclosure, encoded data that has been encoded so as to reduce the load of decoding processing can be decoded.

It should be noted that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a figure explaining intra-refreshing. It is a figure which shows an example of a slice type. It is a figure which shows the 1st example of the slice type of FIG. 2 set to a picture at the time of intra-refreshing. It is a figure which shows the 2nd example of the slice type of FIG. 2 set to a picture at the time of intra-refreshing. It is a flowchart explaining an example of a decoding process. It is a block diagram which shows the structural example of one Embodiment of the encoding apparatus as an image processing apparatus to which this indication is applied. It is a figure which shows the example of a slice type. It is a figure which shows the example of the slice type added to the coding data of a picture unit. It is a flowchart explaining the encoding process of the encoding apparatus of FIG. It is a flowchart explaining the encoding process of the encoding apparatus of FIG. It is a block diagram which shows the structural example of one Embodiment of the decoding apparatus to which this indication is applied. It is a flowchart explaining the decoding process of the decoding apparatus of FIG. It is a block diagram which shows the structural example of the hardware of a computer. It is a figure which shows the example of schematic structure of the television apparatus to which this indication is applied. It is a figure which shows the schematic structural example of the mobile telephone to which this indication is applied. It is a figure which shows the schematic structural example of the recording / reproducing apparatus to which this indication is applied. It is a figure which shows the schematic structural example of the imaging device to which this indication is applied. 2 illustrates an example of a schematic configuration of a video set to which the present disclosure is applied. 2 illustrates an example of a schematic configuration of a video processor to which the present disclosure is applied. The other example of the schematic structure of the video processor to which this indication is applied is shown.

Hereinafter, the premise of this indication and the form for implementing this indication (henceforth an embodiment) are explained. The description will be given in the following order.
0. Premises of the present disclosure (FIGS. 1 to 5)
1. First Embodiment: Encoding Device and Decoding Device (FIGS. 6 to 12)
2. Second Embodiment: Computer (FIG. 13)
3. Third Embodiment: Television apparatus (FIG. 14)
4). Fourth embodiment: mobile phone (FIG. 15)
5. Fifth embodiment: recording / reproducing apparatus (FIG. 16)
6). Sixth embodiment: imaging apparatus (FIG. 17)
7). Seventh embodiment: Video set (FIGS. 18 to 20)

<Premise of this disclosure>
(Intra refreshing explanation)
FIG. 1 is a diagram for explaining intra refreshing.

In FIG. 1, the horizontal axis represents POC (Picture Order Count), and the largest rectangle represents a picture.

As shown in FIG. 1, in intra-refreshing, each picture except the first picture in the coding order is set as a P picture, and the same slice division is performed in each picture. All slices except for one slice are set as inter slices, and one slice set as an intra slice moves downward from the top in the POC order. In addition, the inter slice can refer only to the same slice of the previous picture in the POC order.

Therefore, when playback (display) is performed from an intermediate picture, the reference picture does not exist in the playback target picture until all slices in the picture in the display order are set to intra slices. A slice exists. For example, as shown in FIG. 1, when playback is performed from a picture 11 in which the first slice is an intra slice, until the picture 12 in which the lowest slice is an intra slice is the playback target picture, There are inter-slices that cannot be decoded.

However, after that, the entire picture to be reproduced can always be decoded. Therefore, since it is not necessary to insert an intra picture in which all slices are intra slices in order to enable reproduction from an intermediate picture, it is possible to improve coding efficiency. In addition, when playback is performed from a picture in the middle, it is not necessary to wait for decoding of an intra picture, so playback can be performed with low delay.

(Example of slice type)
FIG. 2 is a diagram illustrating an example of a slice type in a case where a transmission method of encoded data subjected to Intra BC prediction is shared with a transmission method of encoded data subjected to inter prediction.

In the example of FIG. 2, when the slice type is an I slice (I_SLICE), a P slice (P_SLICE), and a B slice (B_SLICE), numbers as information indicating the slice type are 2, 1, 0, respectively. .

Further, when the slice type is an I slice, the slice is a slice for which only intra prediction is performed. When the slice type is a P slice, the slice is an Intra BC slice or an inter slice in which intra prediction or inter prediction is performed. When the slice type is a B slice, the slice is an inter slice.

As described above, in the case of FIG. 2, it is possible to set a P slice as a slice type regardless of whether the slice is an Intra-BC slice or an inter slice. Therefore, it is not possible to recognize whether each slice can be decoded independently depending on the slice type.

(Example of slice type at intra refreshing)
3 and 4 are diagrams showing examples of the slice type of FIG. 2 set in a picture at the time of intra refreshing.

3 and 4, the largest rectangle represents a picture. The same applies to FIG. 8 described later.
As shown in FIG. 3, when intra prediction is performed in an intra slice, the slice type of the intra slice in the picture is set to I slice. The slice type of the inter slice is set to P slice, for example.

On the other hand, as shown in FIG. 4, when intra-BC prediction is performed in an intra slice, for example, both the slice types of an intra slice and an inter slice in a picture are set to P slices.

(Description of decryption process)
FIG. 5 is a flowchart illustrating a decoding process in which the decoding apparatus decodes encoded data of a picture that has been subjected to intra refreshing in which intra BC prediction is performed in an intra slice.

In step S11 of FIG. 5, the decoding apparatus sets the slice count value i to 0. In step S12, the decoding apparatus determines whether the count value i is smaller than the number of slices constituting the picture. If it is determined in step S12 that the count value i is smaller than the number of slices constituting the picture, the process proceeds to step S13.

In step S13, the decoding apparatus decodes the slice header of the i-th slice included in the encoded data of the picture. In step S14, the decoding apparatus sets a count value k of PU (Prediction Unit) to 0.

In step S15, the decoding apparatus determines whether the count value k is smaller than the number of PUs constituting the i-th slice. If it is determined in step S15 that the count value k is smaller than the number of PUs constituting the i-th slice, the process proceeds to step S16.

In step S16, the decoding device decodes the kth PU. In step S17, the decoding apparatus determines whether intra prediction or Intra 予測 BC prediction has been performed when the k-th PU is decoded.

If it is determined in step S17 that intra prediction or Intra BC prediction has been performed at the time of decoding the kth PU, that is, if the i-th slice is a slice that can be independently decoded, the decoding device displays the decoding result. Store and proceed to step S20.

On the other hand, if it is determined in step S17 that intra prediction or Intra-BC prediction is not performed when the k-th PU is decoded, that is, if inter prediction is performed, the process proceeds to step S18. In step S18, the decoding apparatus determines whether the reference picture can be referred to when the k-th PU is decoded, that is, whether the reference picture has been decoded.

If it is determined in step S18 that the reference picture can be referred to when the k-th PU is decoded, the process proceeds to step S20.

On the other hand, if it is determined in step S18 that the reference picture is not referable when the kth PU is decoded, the decoding apparatus discards the decoding result of the kth PU in step S19. Then, the process proceeds to step S20.

In step S20, the decryption apparatus increments the count value k by 1, and returns the process to step S15.

If it is determined in step S15 that the count value k is equal to or greater than the number of PUs constituting the i-th slice, the decoding apparatus increments the count value i by 1 in step S21 and performs the processing. Return to S12.

If it is determined in step S12 that the count value i is greater than or equal to the number of slices that make up the picture, the decoding process ends.

As described above, when the slice type of the Intra BC slice is set to P slice, the decoding device cannot recognize whether each slice can be decoded independently by the slice type before decoding. Therefore, it is necessary to recognize whether decoding is possible independently for each PU during decoding, and the load of decoding processing increases. Therefore, the present technology sets a new type as a slice type of an intra slice that can be decoded independently.

<First embodiment>
(Configuration example of one embodiment of encoding device)
FIG. 6 is a block diagram illustrating a configuration example of an embodiment of an encoding device as an image processing device to which the present disclosure is applied.

6 includes an A / D conversion unit 71, a screen rearrangement buffer 72, a calculation unit 73, an orthogonal transformation unit 74, a quantization unit 75, a lossless encoding unit 76, an accumulation buffer 77, a generation unit 78, An inverse quantization unit 79, an inverse orthogonal transform unit 80, and an addition unit 81 are included. The encoding device 70 includes a filter 82, a frame memory 85, a switch 86, an intra prediction unit 87, a motion prediction / compensation unit 89, a predicted image selection unit 92, and a rate control unit 93. The encoding device 70 performs intra-refreshing by a method according to HEVC.

The coding unit is Coding UNIT (CU) having a recursive hierarchical structure. Specifically, the CU is set by dividing a picture into CTUs (Coding | Tree | Unit | Unit) of fixed size, and dividing | segmenting the CTU into the horizontal direction and the vertical direction by arbitrary times. The maximum size of the CU is LCU (Largest Coding Unit), and the minimum size is SCU (Smallest Coding Unit). CU is divided into PU and TU (transform unit).

The A / D conversion unit 71 of the encoding device 70 performs A / D conversion on the analog signal of the picture in units of frames input as an encoding target. The A / D conversion unit 71 outputs the digital signal of the converted picture to the screen rearrangement buffer 72 for storage.

The screen rearrangement buffer 72 rearranges the stored pictures in the display order in the order for encoding according to the GOP structure. The screen rearrangement buffer 72 sets the rearranged picture as the current picture, and outputs each CU to the calculation unit 73, the intra prediction unit 87, and the motion prediction / compensation unit 89 in order.

The calculation unit 73 performs encoding by subtracting the predicted image in units of PU supplied from the predicted image selection unit 92 from the CU supplied from the screen rearrangement buffer 72. The computing unit 73 outputs information obtained as a result to the orthogonal transform unit 74 as residual information. When the predicted image is not supplied from the predicted image selection unit 92, the calculation unit 73 outputs the CU read from the screen rearrangement buffer 72 to the orthogonal transform unit 74 as residual information as it is.

The orthogonal transform unit 74 orthogonally transforms the residual information from the calculation unit 73 in units of TUs. The orthogonal transform unit 74 supplies an orthogonal transform coefficient obtained as a result of the orthogonal transform to the quantization unit 75.

The quantization unit 75 performs quantization on the orthogonal transform coefficient supplied from the orthogonal transform unit 74. The quantization unit 75 supplies the quantized orthogonal transform coefficient to the lossless encoding unit 76.

The lossless encoding unit 76 acquires the intra prediction mode information indicating the optimal intra prediction mode from the intra prediction unit 87. Further, the lossless encoding unit 76 acquires, from the motion prediction / compensation unit 89, inter prediction mode information indicating an optimal inter prediction mode, a motion vector, reference picture specifying information for specifying a reference picture, and the like. Furthermore, the lossless encoding unit 76 acquires offset filter information related to SAO (Sample-adaptive-offset) processing from the filter 82.

The lossless encoding unit 76 performs variable length coding (for example, CAVLC (Context-Adaptive Variable Length Coding)), arithmetic coding (for example, for the quantized orthogonal transform coefficient supplied from the quantization unit 75, for example. , CABAC (Context-Adaptive Binary Arithmetic Coding) etc.).

Also, the lossless encoding unit 76 performs lossless encoding on intra prediction mode information, inter prediction mode information, motion vectors, reference picture specifying information, offset filter information, and the like as encoding information related to encoding. The lossless encoding unit 76 adds losslessly encoded encoding information and the like to the losslessly encoded orthogonal transform coefficient and supplies the result to the accumulation buffer 77 as encoded data.

The accumulation buffer 77 temporarily stores the encoded data supplied from the lossless encoding unit 76. In addition, the accumulation buffer 77 supplies the stored encoded data for each picture to the generation unit 78.

The generation unit 78 (setting unit) adds a slice header including information indicating the slice type to each piece of encoded data supplied from the accumulation buffer 77 for each slice. Further, the generation unit 78 NALs the slice data which is the encoded data of each slice to which the parameter set such as SPS (Sequence Parameter Set) and PPS (Picture Parameter Set) and the slice header are added, and adds the NAL header. To generate a NAL unit. The NAL header added to sliced NAL data includes a NAL unit type indicating whether or not the picture corresponding to the sliced data is a picture that can be decoded independently. The generation unit 78 outputs an encoded stream composed of a parameter set and slice data NAL units.

The quantized orthogonal transform coefficient output from the quantization unit 75 is also input to the inverse quantization unit 79. The inverse quantization unit 79 performs inverse quantization on the orthogonal transform coefficient quantized by the quantization unit 75 by a method corresponding to the quantization method in the quantization unit 75. The inverse quantization unit 79 supplies the orthogonal transform coefficient obtained as a result of the inverse quantization to the inverse orthogonal transform unit 80.

The inverse orthogonal transform unit 80 performs inverse orthogonal transform on the orthogonal transform coefficient supplied from the inverse quantization unit 79 by a method corresponding to the orthogonal transform method in the orthogonal transform unit 74 in units of TUs. The inverse orthogonal transform unit 80 supplies the residual information obtained as a result to the addition unit 81.

The addition unit 81 decodes the CU by adding the residual information supplied from the inverse orthogonal transform unit 80 and the predicted image supplied from the predicted image selection unit 92. When the predicted image is not supplied from the predicted image selection unit 92, the adding unit 81 uses the residual information supplied from the inverse orthogonal transform unit 80 as a decoding result. The adder 81 supplies the CU to the frame memory 85 and the filter 82.

The filter 82 performs a deblocking filter process on the CU supplied from the adding unit 81. The filter 82 performs SAO processing (adaptive offset filter processing) on the CU after the deblocking filter processing. Types of SAO processing include edge offset processing and band offset processing, which are selected in units of LCUs.

The filter 82 supplies the CU after the SAO processing to the frame memory 85. Further, the filter 82 supplies information indicating the type and offset of the SAO processing performed to the lossless encoding unit 76 as offset filter information.

The frame memory 85 is composed of, for example, DRAM (Dynamic Random Access Memory). The frame memory 85 stores the CU before deblocking filter processing supplied from the adding unit 81 and the CU after SAO processing supplied from the filter 82. Among the pixels before the deblocking filter processing stored in the frame memory 85, the peripheral pixels of the PU are supplied to the intra prediction unit 87 via the switch 86.

In addition, a part of the current picture before the deblocking filter process stored in the frame memory 85 and a picture after the SAO process before the current picture in the coding order are motion-predicted via the switch 86 as reference picture candidates. -It outputs to the compensation part 89.

The intra prediction unit 87 performs intra prediction processing in all candidate intra prediction modes using peripheral pixels read from the frame memory 85 via the switch 86 in units of PUs.

In addition, the intra prediction unit 87 performs, on a PU basis, all candidate intra prediction modes based on the CU supplied from the screen rearrangement buffer 72 and the prediction image generated as a result of the intra prediction process. A cost function value (details will be described later) is calculated. Then, the intra prediction unit 87 determines the intra prediction mode that minimizes the cost function value as the optimal intra prediction mode for each PU.

The intra prediction unit 87 supplies the prediction image generated in the optimal intra prediction mode and the corresponding cost function value to the prediction image selection unit 92 in units of PUs. The intra prediction unit 87 supplies the intra prediction mode information to the lossless encoding unit 76 when the prediction image selection unit 92 is notified of the selection of the prediction image generated in the optimal intra prediction mode.

The cost function value is also called RD (RateRDistortion) cost. For example, the High 手法 Complexity mode or Low Complexity mode method defined by JM (Joint Model), which is the reference software in the H.264 / AVC format. Is calculated based on Reference software in the H.264 / AVC format is disclosed at http://iphome.hhi.de/suehring/tml/index.htm.

When the slice including the CU supplied from the screen rearrangement buffer 72 is an inter slice, the motion prediction / compensation unit 89 performs inter prediction of all candidate PU modes (details will be described later).

Specifically, the motion prediction / compensation unit 89 quadruples the resolution of the reference picture candidate and the CU in the horizontal and vertical directions before the current picture in the coding order. The motion prediction / compensation unit 89 detects a motion vector with 1/4 pixel accuracy for each PU in each PU mode using a reference picture candidate and a CU in which the horizontal and vertical resolutions are quadrupled. To do. The motion prediction / compensation unit 89 performs compensation processing on a reference picture candidate whose horizontal and vertical resolutions are quadrupled based on the detected motion vector for each PU in each PU mode, A prediction image is generated. Note that the PU mode is a mode representing a partitioning method or the like of the PU to the CU.

Also, the motion prediction / compensation unit 89 performs intra-BC prediction for all candidate PU modes. Specifically, the motion prediction / compensation unit 89 uses, for each PU in each PU mode, an integer pixel accuracy using a part of the current picture before deblocking filter processing supplied as a reference picture candidate and the CU. The motion vector is detected. The motion prediction / compensation unit 89 performs compensation processing on a part of the current picture before the deblocking filter processing based on the detected motion vector for each PU in each PU mode, and generates a predicted image.

The motion prediction / compensation unit 89 also performs intra prediction of all candidate PU modes and reference picture candidates, and intra of all candidate PU modes based on the CU and the predicted image in units of PUs. A cost function value is calculated for BC prediction. The motion prediction / compensation unit 89 determines, for each PU, a mode representing a PU mode having a minimum cost function value and inter prediction or Intra-BC prediction as the optimal inter prediction mode. Then, the motion prediction / compensation unit 89 supplies the predicted image generated in the optimal inter prediction mode and the corresponding cost function value to the predicted image selection unit 92 in units of PUs.

The motion prediction / compensation unit 89 determines a reference picture candidate as a reference picture when the prediction image selection unit 92 is notified of selection of a prediction image generated in the optimal inter prediction mode. Then, the motion prediction / compensation unit 89 supplies the motion vector, the reference picture specifying information, and the inter prediction mode information corresponding to the predicted image to the lossless encoding unit 76.

Based on the cost function values supplied from the intra prediction unit 87 and the motion prediction / compensation unit 89, the predicted image selection unit 92 has a smaller corresponding cost function value among the optimal intra prediction mode and the optimal inter prediction mode. Are determined as the optimum prediction mode. Then, the predicted image selection unit 92 supplies the predicted image in the optimal prediction mode to the calculation unit 73 and the addition unit 81. Further, the predicted image selection unit 92 notifies the intra prediction unit 87 or the motion prediction / compensation unit 89 of selection of the predicted image in the optimal prediction mode.

The rate control unit 93 controls the rate of the quantization operation of the quantization unit 75 based on the encoded data stored in the storage buffer 77 so that overflow or underflow does not occur.

(Example of slice type)
FIG. 7 is a diagram illustrating an example of a slice type.

The slice type shown in FIG. 7 is different from the slice type shown in FIG. 2 in that when the slice type is a P slice, the slice is not an Intra BC slice, and a new IBC slice (IBC_SLICE) for an intra slice is provided. Is different.

That is, in the slice type of FIG. 7, when the slice type is P slice, the slice is an inter slice in which intra prediction or inter prediction is performed.

Also, when the slice type is an IBC slice, the slice is an intra slice in which intra prediction or Intra-BC prediction is performed. Therefore, the IBC slice is prediction information indicating that the slice is encoded using Intra BC prediction or intra prediction. When the slice type is an IBC slice, the number as information representing the slice type is 3.

As described above, when the slice is an intra-slice that can be decoded independently, the slice type is I slice or IBC slice, and when the slice is an inter-slice that cannot be decoded independently, the slice type is P slice or B slice. Become. Therefore, the decoding apparatus can recognize whether or not a slice can be independently decoded by the slice type before decoding.

(Example of slice type added to encoded data in units of pictures)
FIG. 8 is a diagram illustrating an example of a slice type added to encoded data in units of pictures by the generation unit 78 in FIG.

As shown in FIG. 8, the generation unit 78 adds a slice header including 3 representing an IBC slice as a slice type to encoded data of an intra slice among slices in a picture. Further, the generation unit 78 adds a slice header including 1 representing P slice as the slice type to the encoded data of the inter slice.

(Description of processing of encoding device)
9 and 10 are flowcharts for explaining the encoding process of the encoding device 70 of FIG.

In step S31 in FIG. 9, the A / D conversion unit 71 of the encoding device 70 performs A / D conversion on the analog signal of the frame unit picture input as the encoding target, and displays the digital signal of the converted picture on the screen. The data is output to the rearrangement buffer 72 and stored.

In step S32, the screen rearrangement buffer 72 rearranges the stored pictures in the display order in the order for encoding according to the GOP structure. The screen rearrangement buffer 72 sets the rearranged picture as the current picture, and sequentially supplies each CU of the current picture to the calculation unit 73, the intra prediction unit 87, and the motion prediction / compensation unit 89.

In step S33, the intra prediction unit 87 performs intra prediction processing of all candidate intra prediction modes using peripheral pixels read from the frame memory 85 via the switch 86 in units of PUs. In addition, the intra prediction unit 87 performs, on a PU basis, all candidate intra prediction modes based on the CU supplied from the screen rearrangement buffer 72 and the prediction image generated as a result of the intra prediction process. Calculate the cost function value. Then, the intra prediction unit 87 determines the intra prediction mode that minimizes the cost function value as the optimal intra prediction mode for each PU.

Also, the motion prediction / compensation unit 89 performs intra-BC prediction for all candidate PU modes in units of PUs. Furthermore, when the slice including the CU supplied from the screen rearrangement buffer 72 is an inter slice, the motion prediction / compensation unit 89 performs inter prediction for all candidate PU modes in units of PUs.

The motion prediction / compensation unit 89 performs intra prediction of all candidate PU modes and reference picture candidates and intra-BC prediction of all candidate PU modes based on the CU and the predicted image in units of PUs. For this, a cost function value is calculated. The motion prediction / compensation unit 89 determines, for each PU, a mode representing a PU mode having a minimum cost function value and inter prediction or Intra-BC prediction as the optimal inter prediction mode. Then, the motion prediction / compensation unit 89 supplies the predicted image generated in the optimal inter prediction mode and the corresponding cost function value to the predicted image selection unit 92 in units of PUs.

In step S34, the predicted image selection unit 92 has a small cost function value in the optimal intra prediction mode and the optimal inter prediction mode based on the cost function values supplied from the intra prediction unit 87 and the motion prediction / compensation unit 89. Is determined to be the optimal prediction mode. Then, the predicted image selection unit 92 supplies the predicted image in the optimal prediction mode to the calculation unit 73 and the addition unit 81.

In step S35, the predicted image selecting unit 92 determines whether or not the optimal prediction mode is the optimal inter prediction mode. When it is determined in step S35 that the optimal prediction mode is the optimal inter prediction mode, the predicted image selection unit 92 notifies the motion prediction / compensation unit 89 of the selection of the predicted image generated in the optimal inter prediction mode.

In step S36, the motion prediction / compensation unit 89 supplies the inter prediction mode information, the motion vector, and the reference picture specifying information corresponding to the prediction image selected by the prediction image selection unit 92 to the lossless encoding unit 76. Then, the process proceeds to step S38.

On the other hand, when it is determined in step S35 that the optimal prediction mode is not the optimal inter prediction mode, that is, when the optimal prediction mode is the optimal intra prediction mode, the predicted image selection unit 92 performs the prediction generated in the optimal intra prediction mode. The intra prediction unit 87 is notified of image selection. In step S37, the intra prediction unit 87 supplies the intra prediction mode information corresponding to the prediction image selected by the prediction image selection unit 92 to the lossless encoding unit 76, and the process proceeds to step S38.

In step S38, the calculation unit 73 performs encoding by subtracting the prediction image supplied from the prediction image selection unit 92 from the CU supplied from the screen rearrangement buffer 72. The computing unit 73 outputs information obtained as a result to the orthogonal transform unit 74 as residual information.

In step S39, the orthogonal transform unit 74 performs orthogonal transform on the residual information from the calculation unit 73 in units of TUs, and supplies the resulting orthogonal transform coefficient to the quantization unit 75.

In step S40, the quantization unit 75 quantizes the orthogonal transform coefficient supplied from the orthogonal transform unit 74, and supplies the quantized orthogonal transform coefficient to the lossless encoding unit 76 and the inverse quantization unit 79.

In step S41 of FIG. 10, the inverse quantization unit 79 inversely quantizes the quantized orthogonal transform coefficient supplied from the quantization unit 75 and supplies the resulting orthogonal transform coefficient to the inverse orthogonal transform unit 80. .

In step S42, the inverse orthogonal transform unit 80 performs inverse orthogonal transform on the orthogonal transform coefficient supplied from the inverse quantization unit 79 in units of TUs, and supplies residual information obtained as a result to the adder 81.

In step S43, the addition unit 81 adds the residual information supplied from the inverse orthogonal transform unit 80 and the prediction image supplied from the prediction image selection unit 92, and decodes the CU. The adder 81 supplies the decoded CU to the frame memory 85 and the filter 82.

In step S44, the filter 82 performs deblocking filter processing on the CU supplied from the adding unit 81.

In step S45, the filter 82 performs SAO processing on the CU after the deblocking filter processing. The filter 82 supplies the CU after the SAO processing to the frame memory 85. Further, the filter 82 supplies information indicating the type and offset of the SAO processing performed to the lossless encoding unit 76 as offset filter information.

In step S46, the frame memory 85 stores the CU before deblocking filter processing supplied from the adding unit 81 and the CU after SAO processing supplied from the filter 82. Among the pixels before the deblocking filter processing stored in the frame memory 85, the peripheral pixels of the PU are supplied to the intra prediction unit 87 via the switch 86.

In step S47, the lossless encoding unit 76 losslessly encodes the intra prediction mode information, the inter prediction mode information, the motion vector, the reference picture specifying information, and the offset filter information as the encoding information.

In step S48, the lossless encoding unit 76 performs lossless encoding on the quantized orthogonal transform coefficient supplied from the quantization unit 75. Then, the lossless encoding unit 76 generates encoded data from the encoding information that has been losslessly encoded in the process of step S 47 and the orthogonal transform coefficient that has been losslessly encoded, and supplies the encoded data to the accumulation buffer 77.

In step S49, the accumulation buffer 77 temporarily accumulates the encoded data supplied from the lossless encoding unit 76.

In step S50, the rate control unit 93 controls the rate of the quantization operation of the quantization unit 75 based on the encoded data stored in the storage buffer 77 so that overflow or underflow does not occur.

In step S 51, the accumulation buffer 77 supplies the encoded data in units of pictures stored in the accumulation buffer 77 to the generation unit 78.

In step S52, the generation unit 78 adds a slice header including information indicating the slice type for each slice to the encoded data in units of pictures supplied from the accumulation buffer 77.

Specifically, the generation unit 78 adds a slice header including 3 representing an IBC slice as a slice type to the encoded data of the intra slice. In addition, the generation unit 78 adds a slice header including 1 representing P slice as the slice type to the encoded data of the inter slice. Thereby, slice data of each slice is generated.

In step S53, the generation unit 78 NALs the parameter set and slice data of each slice to generate a NAL unit, and generates an encoded stream from the NAL unit. The generation unit 78 outputs the encoded stream and ends the process.

(Configuration example of one embodiment of decoding device)
FIG. 11 is a block diagram illustrating a configuration example of an embodiment of a decoding device as an image processing device to which the present disclosure is applied, which decodes an encoded stream transmitted from the encoding device 70 in FIG. 6.

11 includes an accumulation buffer 131, a lossless decoding unit 132, an inverse quantization unit 133, an inverse orthogonal transform unit 134, an addition unit 135, a filter 136, a screen rearrangement buffer 139, and a D / A conversion unit 140. . In addition, the decoding device 130 includes a frame memory 141, a switch 142, an intra prediction unit 143, a motion compensation unit 147, and a switch 148.

The accumulation buffer 131 of the decoding apparatus 130 receives and accumulates the encoded stream from the encoding apparatus 70 of FIG. The accumulation buffer 131 supplies slice data in units of pictures in the accumulated encoded stream to the lossless decoding unit 132 as slice data of the current picture in order. Note that the parameter set in the encoded stream is supplied to each unit of the decoding device 130 as necessary, and used for processing.

The lossless decoding unit 132 decodes the slice header from the slice data supplied from the accumulation buffer 131, and supplies information representing the slice type included in the slice header to the motion compensation unit 147.

The lossless decoding unit 132 sequentially performs lossless decoding such as variable length decoding and arithmetic decoding corresponding to the lossless encoding of the lossless encoding unit 76 of FIG. 6 with respect to the encoded data of each CU constituting the slice data. As a result, quantized orthogonal transform coefficients and encoded information are obtained. The lossless decoding unit 132 supplies the quantized orthogonal transform coefficient to the inverse quantization unit 133. In addition, the lossless decoding unit 132 supplies intra prediction mode information and the like as encoded information to the intra prediction unit 143, and supplies reference picture specifying information, motion vectors, inter prediction mode information, and the like to the motion compensation unit 147.

Furthermore, the lossless decoding unit 132 supplies intra prediction mode information or inter prediction mode information as encoded information to the switch 148. The lossless decoding unit 132 supplies offset filter information as encoded information to the filter 136.

The inverse quantization unit 133, the inverse orthogonal transform unit 134, the addition unit 135, the filter 136, the frame memory 141, the switch 142, the intra prediction unit 143, and the motion compensation unit 147 are the inverse quantization unit 79 and the inverse orthogonal transform unit illustrated in FIG. 80, the adding unit 81, the filter 82, the frame memory 85, the switch 86, the intra prediction unit 87, and the motion prediction / compensation unit 89, the same processing is performed, thereby decoding the CU.

Specifically, the inverse quantization unit 133 inversely quantizes the quantized orthogonal transform coefficient from the lossless decoding unit 132 and supplies the orthogonal transform coefficient obtained as a result to the inverse orthogonal transform unit 134.

The inverse orthogonal transform unit 134 performs inverse orthogonal transform on the orthogonal transform coefficient from the inverse quantization unit 133 in units of TUs. The inverse orthogonal transform unit 134 supplies residual information obtained as a result of the inverse orthogonal transform to the addition unit 135.

The addition unit 135 (decoding unit) decodes the CU by adding the residual information supplied from the inverse orthogonal transform unit 134 and the prediction image supplied from the switch 148. Note that, when the predicted image is not supplied from the switch 148, the adding unit 135 uses the residual information supplied from the inverse orthogonal transform unit 134 as a decoding result. The adding unit 135 supplies the CU obtained as a result of decoding to the frame memory 141 and the filter 136.

The filter 136 performs deblocking filter processing on the CU supplied from the adding unit 135. The filter 136 uses the offset represented by the offset filter information supplied from the lossless decoding unit 132 to perform the type of SAO processing represented by the offset filter information on the CU after the deblocking filter processing. The filter 136 supplies the CU after the SAO processing to the frame memory 141 and the screen rearrangement buffer 139.

The screen rearrangement buffer 139 stores the CU after SAO processing supplied from the filter 136 in units of frames. Further, the screen rearrangement buffer 139 discards (deletes) the stored PU based on the reference impossible information indicating that the reference picture from the motion compensation unit 147 is not referable. The screen rearrangement buffer 139 rearranges the stored pictures for encoding in the original display order, and supplies them to the D / A converter 140.

The D / A conversion unit 140 D / A converts the picture supplied from the screen rearrangement buffer 139 and outputs it.

The frame memory 141 is composed of, for example, DRAM. The frame memory 141 stores the CU before deblocking filter processing supplied from the adding unit 135 and the CU after SAO processing supplied from the filter 136. Further, the frame memory 141 discards the stored PU based on the reference impossible information supplied from the motion compensation unit 147.

Among the pixels before the deblocking filter processing stored in the frame memory 141, the peripheral pixels of the PU are supplied to the intra prediction unit 143 via the switch 142. Also, a part of the current picture before the deblocking filter process stored in the frame memory 141 and a picture after the SAO process before the current picture in the coding order are used as a reference picture via the switch 142 and the motion compensation unit 147. Is output.

The intra prediction unit 143 uses the peripheral pixels read from the frame memory 141 via the switch 142 in units of PUs, and performs intra prediction in the optimal intra prediction mode indicated by the intra prediction mode information supplied from the lossless decoding unit 132. Process. The intra prediction unit 143 supplies the prediction image generated as a result to the switch 148.

The motion compensation unit 147 performs motion compensation processing in units of PUs based on information representing slice types, inter prediction mode information, reference picture specifying information, and motion vectors supplied from the lossless decoding unit 132.

Specifically, the motion compensation unit 147 determines whether there is a reference picture specified by the reference picture specifying information in the frame memory 141 based on the information indicating the slice type supplied from the lossless decoding unit 132, that is, the reference It is determined whether the picture is a decoded picture. The motion compensation unit 147 supplies the non-referenceable information to the screen rearrangement buffer 139 and the frame memory 141 based on the determination result.

The motion compensation unit 147 reads the reference picture from the frame memory 141 via the switch 142 when the reference picture exists in the frame memory 141. Then, the motion compensation unit 147 performs motion compensation processing in the optimal inter prediction mode indicated by the inter prediction mode information using the reference picture and the motion vector, and supplies a prediction image generated as a result to the switch 148.

When the intra prediction mode information is supplied from the lossless decoding unit 132, the switch 148 supplies the prediction image supplied from the intra prediction unit 143 to the addition unit 135. On the other hand, when the inter prediction mode information is supplied from the lossless decoding unit 132, the switch 148 supplies the prediction image supplied from the motion compensation unit 147 to the adding unit 135.

(Description of processing of decoding device)
FIG. 12 is a flowchart for explaining the decoding process of the decoding device 130 of FIG. This decoding process is started, for example, when slice data of the current picture is supplied to the lossless decoding unit 132.

12, the lossless decoding unit 132 sets the slice count value i to 0. In step S142, the lossless decoding unit 132 determines whether the count value i is smaller than the number of slices constituting the current picture. If it is determined in step S142 that the count value i is smaller than the number of slices constituting the current picture, the process proceeds to step S143.

In step S143, the lossless decoding unit 132 decodes the slice header from the slice data of the i-th slice among the slice data supplied from the accumulation buffer 131. The lossless decoding unit 132 supplies information representing the slice type included in the decoded slice header to the motion compensation unit 147.

In addition, the lossless decoding unit 132 performs lossless decoding such as variable length decoding and arithmetic decoding on the encoded data of the i-th slice data, thereby obtaining the quantized orthogonal transform coefficient and the encoded information. obtain. The lossless decoding unit 132 supplies the quantized orthogonal transform coefficient to the inverse quantization unit 133, and the inverse quantization unit 133 inversely quantizes the quantized orthogonal transform coefficient from the lossless decoding unit 132. The inverse orthogonal transform unit 134 performs inverse orthogonal transform on the orthogonal transform coefficients obtained as a result in units of TUs to obtain residual information.

On the other hand, the lossless decoding unit 132 supplies intra prediction mode information as encoded information to the intra prediction unit 143, and supplies reference picture specifying information, motion vectors, inter prediction mode information, and the like to the motion compensation unit 147.

In step S144, based on the information indicating the slice type supplied from the lossless decoding unit 132, the motion compensation unit 147 determines whether the slice type of the i-th slice is an intra slice, that is, information indicating the slice type is 3 It is determined whether or not.

If it is determined in step S144 that the slice type of the i-th slice is an intra slice, that is, if the i-th slice can be decoded independently, in step S145, the decoding device 130 determines the count value of the PU. Set k to 0.

In step S146, the decoding device 130 determines whether the count value k is smaller than the number of PUs constituting the i-th slice. If it is determined in step S146 that the count value k is smaller than the number of PUs constituting the i-th slice, the process proceeds to step S147.

In step S147, the decoding device 130 decodes the encoded data of the kth PU among the slice data of the i-th slice. Specifically, for the k-th PU, the motion compensation unit 147 performs Intra BC prediction, or the intra prediction unit 143 performs intra prediction processing, and the addition unit 135 performs a prediction image obtained as a result. Add residual information. The decoding result is supplied to the screen rearrangement buffer 139 through the filter 136 and supplied to the frame memory 141 and stored in units of CUs.

In step S148, the decryption apparatus 130 increments the count value k by 1, and returns the process to step S146.

On the other hand, if it is determined in step S146 that the count value k is equal to or greater than the number of PUs constituting the i-th slice, the process proceeds to step S149. In step S149, the lossless decoding unit 132 increments the count value i by 1, and returns the process to step S142.

If it is determined in step S144 that the slice type of the i-th slice is not an intra slice, that is, if the information indicating the slice type is 1, the process proceeds to step S150.

Since the processing in steps S150 and S151 is the same as the processing in steps S145 and S146, description thereof is omitted.

In step S152, the decoding device 130 decodes the encoded data of the kth PU among the slice data of the i-th slice. Specifically, for the k-th PU, the intra prediction unit 143 performs intra prediction processing, or the motion compensation unit 147 performs inter prediction, and the adding unit 135 determines the prediction image obtained as a result and the remaining image. Add difference information. Alternatively, the adding unit 135 directly uses the residual information as a decoding result. The decoding result is supplied to the screen rearrangement buffer 139 through the filter 136 and supplied to the frame memory 141 and stored in units of CUs.

In step S153, the decoding device 130 determines whether or not intra prediction processing has been performed in step S152. When it is determined in step S153 that the intra prediction process has been performed in the process of step S152, the process proceeds to step S156.

On the other hand, when it is determined in step S153 that the intra prediction process is not performed in the process of step S152, the process proceeds to step S154. In step S154, the motion compensation unit 147 determines whether or not the reference picture can be referred to in the process of step S152, that is, whether or not a predicted image has been generated.

If it is determined in step S154 that the reference picture can be referred to, the process proceeds to step S156.

On the other hand, when it is determined in step S154 that the reference picture is not referable, the motion compensation unit 147 supplies the non-referenceable information to the screen rearrangement buffer 139 and the frame memory 141. In step S155, the screen rearrangement buffer 139 and the frame memory 141 discard the decoding result of the kth PU according to the unreferenceable information. Then, the process proceeds to step S156.

In step S156, the decryption apparatus 130 increments the count value k by 1, and returns the process to step S151.

If it is determined in step S151 that the count value k is equal to or greater than the number of PUs constituting the i-th slice, the lossless decoding unit 132 increments the count value i by 1 in step S157 and performs processing. Is returned to step S142.

If it is determined in step S142 that the count value i is greater than or equal to the number of slices that make up the current picture, the decoding process ends.

As described above, the decoding device 130 can recognize whether each slice is an intra-slice that can be independently decoded before decoding based on the slice header. Therefore, when the slice is an intra slice, there is no need to determine whether or not decoding is possible independently for each PU. That is, the decoding device 130 does not need to perform the process of step S153 of FIG. 12 similar to the process of step S17 of FIG. 5 for the intra slice. As a result, the load of decoding processing is reduced.

In this embodiment, the encoding device 70 always sets the slice type of the intra slice to IBC slice. However, if the intra slice is a slice for which only intra prediction is performed, the slice type of the intra slice is set to I slice. May be. In this case, in step S144 of FIG. 12, it is determined whether or not the slice type of the i-th slice is an intra slice depending on whether or not the information indicating the slice type of the i-th slice is 2 or more.

Further, in this embodiment, the slice type of the inter slice is P slice, but it may be B slice.

Furthermore, in this embodiment, a slice type for intra slice is newly set. However, after slice data, Region refresh information SEI (Supplemental Enhancement Information) indicating whether or not the slice data can be decoded independently ) Etc. may be added.

In this case, the decoding apparatus capable of recognizing Region refresh information SEI can recognize whether the slice is independently decodable by Region refresh information SEI before decoding the information indicating the slice type. However, a decoding device that cannot recognize Region refresh information SEI cannot recognize whether it is a slice that can be decoded independently.

<Second Embodiment>
(Description of computer to which the present disclosure is applied)
The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed in the computer. Here, the computer includes, for example, a general-purpose personal computer capable of executing various functions by installing various programs by installing a computer incorporated in dedicated hardware.

FIG. 13 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processing by a program.

In the computer, a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, and a RAM (Random Access Memory) 203 are connected to each other by a bus 204.

An input / output interface 205 is further connected to the bus 204. An input unit 206, an output unit 207, a storage unit 208, a communication unit 209, and a drive 210 are connected to the input / output interface 205.

The input unit 206 includes a keyboard, a mouse, a microphone, and the like. The output unit 207 includes a display, a speaker, and the like. The storage unit 208 includes a hard disk, a nonvolatile memory, and the like. The communication unit 209 includes a network interface and the like. The drive 210 drives a removable medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

In the computer configured as described above, the CPU 201 loads, for example, the program stored in the storage unit 208 to the RAM 203 via the input / output interface 205 and the bus 204 and executes the program. Is performed.

The program executed by the computer (CPU 201) can be provided by being recorded in the removable medium 211 as a package medium or the like, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

In the computer, the program can be installed in the storage unit 208 via the input / output interface 205 by attaching the removable medium 211 to the drive 210. The program can be received by the communication unit 209 via a wired or wireless transmission medium and installed in the storage unit 208. In addition, the program can be installed in the ROM 202 or the storage unit 208 in advance.

The program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.

<Third Embodiment>
(Example configuration of television device)
FIG. 14 illustrates a schematic configuration of a television apparatus to which the present disclosure is applied. The television apparatus 900 includes an antenna 901, a tuner 902, a demultiplexer 903, a decoder 904, a video signal processing unit 905, a display unit 906, an audio signal processing unit 907, a speaker 908, and an external interface unit 909. Furthermore, the television apparatus 900 includes a control unit 910, a user interface unit 911, and the like.

The tuner 902 selects a desired channel from the broadcast wave signal received by the antenna 901, demodulates it, and outputs the obtained encoded bit stream to the demultiplexer 903.

The demultiplexer 903 extracts video and audio packets of the program to be viewed from the encoded bit stream, and outputs the extracted packet data to the decoder 904. Further, the demultiplexer 903 supplies a packet of data such as EPG (Electronic Program Guide) to the control unit 910. If scrambling is being performed, descrambling is performed by a demultiplexer or the like.

The decoder 904 performs packet decoding processing, and outputs video data generated by the decoding processing to the video signal processing unit 905 and audio data to the audio signal processing unit 907.

The video signal processing unit 905 performs noise removal, video processing according to user settings, and the like on the video data. The video signal processing unit 905 generates video data of a program to be displayed on the display unit 906, image data by processing based on an application supplied via a network, and the like. The video signal processing unit 905 generates video data for displaying a menu screen for selecting an item and the like, and superimposes the video data on the video data of the program. The video signal processing unit 905 generates a drive signal based on the video data generated in this way, and drives the display unit 906.

The display unit 906 drives a display device (for example, a liquid crystal display element or the like) based on a drive signal from the video signal processing unit 905 to display a program video or the like.

The audio signal processing unit 907 performs predetermined processing such as noise removal on the audio data, performs D / A conversion processing and amplification processing on the processed audio data, and outputs the audio data to the speaker 908.

The external interface unit 909 is an interface for connecting to an external device or a network, and transmits and receives data such as video data and audio data.

A user interface unit 911 is connected to the control unit 910. The user interface unit 911 includes an operation switch, a remote control signal receiving unit, and the like, and supplies an operation signal corresponding to a user operation to the control unit 910.

The control unit 910 is configured using a CPU (Central Processing Unit), a memory, and the like. The memory stores a program executed by the CPU, various data necessary for the CPU to perform processing, EPG data, data acquired via a network, and the like. The program stored in the memory is read and executed by the CPU at a predetermined timing such as when the television device 900 is activated. The CPU executes each program to control each unit so that the television device 900 operates in accordance with the user operation.

Note that the television device 900 includes a bus 912 for connecting the tuner 902, the demultiplexer 903, the video signal processing unit 905, the audio signal processing unit 907, the external interface unit 909, and the control unit 910.

In the thus configured television apparatus, the decoder 904 is provided with the function of the decoding apparatus (decoding method) of the present application. For this reason, the encoded data encoded so as to reduce the load of the decoding process can be decoded.

<Fourth embodiment>
(Configuration example of mobile phone)
FIG. 15 illustrates a schematic configuration of a mobile phone to which the present disclosure is applied. The cellular phone 920 includes a communication unit 922, an audio codec 923, a camera unit 926, an image processing unit 927, a demultiplexing unit 928, a recording / reproducing unit 929, a display unit 930, and a control unit 931. These are connected to each other via a bus 933.

In addition, an antenna 921 is connected to the communication unit 922, and a speaker 924 and a microphone 925 are connected to the audio codec 923. Further, an operation unit 932 is connected to the control unit 931.

The mobile phone 920 performs various operations such as transmission / reception of voice signals, transmission / reception of e-mail and image data, image shooting, and data recording in various modes such as a voice call mode and a data communication mode.

In the voice call mode, the voice signal generated by the microphone 925 is converted into voice data and compressed by the voice codec 923 and supplied to the communication unit 922. The communication unit 922 performs audio data modulation processing, frequency conversion processing, and the like to generate a transmission signal. The communication unit 922 supplies a transmission signal to the antenna 921 and transmits it to a base station (not shown). In addition, the communication unit 922 performs amplification, frequency conversion processing, demodulation processing, and the like of the reception signal received by the antenna 921, and supplies the obtained audio data to the audio codec 923. The audio codec 923 performs data expansion of the audio data and conversion to an analog audio signal and outputs the result to the speaker 924.

In the data communication mode, when mail transmission is performed, the control unit 931 receives character data input by operating the operation unit 932 and displays the input characters on the display unit 930. In addition, the control unit 931 generates mail data based on a user instruction or the like in the operation unit 932 and supplies the mail data to the communication unit 922. The communication unit 922 performs mail data modulation processing, frequency conversion processing, and the like, and transmits the obtained transmission signal from the antenna 921. In addition, the communication unit 922 performs amplification, frequency conversion processing, demodulation processing, and the like of the reception signal received by the antenna 921, and restores mail data. This mail data is supplied to the display unit 930 to display the mail contents.

Note that the mobile phone 920 can also store the received mail data in a storage medium by the recording / playback unit 929. The storage medium is any rewritable storage medium. For example, the storage medium is a removable memory such as a RAM, a semiconductor memory such as a built-in flash memory, a hard disk, a magnetic disk, a magneto-optical disk, an optical disk, a USB (Universal Serial Bus) memory, or a memory card.

When transmitting image data in the data communication mode, the image data generated by the camera unit 926 is supplied to the image processing unit 927. The image processing unit 927 performs encoding processing of image data and generates encoded data.

The demultiplexing unit 928 multiplexes the encoded data generated by the image processing unit 927 and the audio data supplied from the audio codec 923 by a predetermined method, and supplies the multiplexed data to the communication unit 922. The communication unit 922 performs modulation processing and frequency conversion processing of multiplexed data, and transmits the obtained transmission signal from the antenna 921. In addition, the communication unit 922 performs amplification, frequency conversion processing, demodulation processing, and the like of the reception signal received by the antenna 921, and restores multiplexed data. This multiplexed data is supplied to the demultiplexing unit 928. The demultiplexing unit 928 performs demultiplexing of the multiplexed data, and supplies the encoded data to the image processing unit 927 and the audio data to the audio codec 923. The image processing unit 927 performs a decoding process on the encoded data to generate image data. The image data is supplied to the display unit 930 and the received image is displayed. The audio codec 923 converts the audio data into an analog audio signal, supplies the analog audio signal to the speaker 924, and outputs the received audio.

In the cellular phone device configured as described above, the image processing unit 927 is provided with the functions of the encoding device and the decoding device (encoding method and decoding method) of the present application. For this reason, the load of the decoding process can be reduced. Also, the encoded data encoded so as to reduce the load of the decoding process can be decoded.

<Fifth embodiment>
(Configuration example of recording / reproducing apparatus)
FIG. 16 illustrates a schematic configuration of a recording / reproducing apparatus to which the present disclosure is applied. The recording / reproducing apparatus 940 records, for example, audio data and video data of a received broadcast program on a recording medium, and provides the recorded data to the user at a timing according to a user instruction. The recording / reproducing device 940 can also acquire audio data and video data from another device, for example, and record them on a recording medium. Further, the recording / reproducing apparatus 940 decodes and outputs the audio data and video data recorded on the recording medium, thereby enabling image display and audio output on the monitor apparatus or the like.

The recording / reproducing apparatus 940 includes a tuner 941, an external interface unit 942, an encoder 943, an HDD (Hard Disk Drive) unit 944, a disk drive 945, a selector 946, a decoder 947, an OSD (On-Screen Display) unit 948, a control unit 949, A user interface unit 950 is included.

Tuner 941 selects a desired channel from a broadcast signal received by an antenna (not shown). The tuner 941 outputs an encoded bit stream obtained by demodulating the received signal of a desired channel to the selector 946.

The external interface unit 942 includes at least one of an IEEE 1394 interface, a network interface unit, a USB interface, a flash memory interface, and the like. The external interface unit 942 is an interface for connecting to an external device, a network, a memory card, and the like, and receives data such as video data and audio data to be recorded.

The encoder 943 performs encoding by a predetermined method when the video data and audio data supplied from the external interface unit 942 are not encoded, and outputs an encoded bit stream to the selector 946.

The HDD unit 944 records content data such as video and audio, various programs, and other data on a built-in hard disk, and reads them from the hard disk during playback.

The disk drive 945 records and reproduces signals with respect to the mounted optical disk. An optical disk such as a DVD disk (DVD-Video, DVD-RAM, DVD-R, DVD-RW, DVD + R, DVD + RW, etc.), a Blu-ray (registered trademark) disk, or the like.

The selector 946 selects one of the encoded bit streams from the tuner 941 or the encoder 943 and supplies it to either the HDD unit 944 or the disk drive 945 when recording video or audio. Further, the selector 946 supplies the encoded bit stream output from the HDD unit 944 or the disk drive 945 to the decoder 947 at the time of reproduction of video and audio.

The decoder 947 performs a decoding process on the encoded bit stream. The decoder 947 supplies the video data generated by performing the decoding process to the OSD unit 948. The decoder 947 outputs audio data generated by performing the decoding process.

The OSD unit 948 generates video data for displaying a menu screen for selecting an item and the like, and superimposes it on the video data output from the decoder 947 and outputs the video data.

A user interface unit 950 is connected to the control unit 949. The user interface unit 950 includes an operation switch, a remote control signal receiving unit, and the like, and supplies an operation signal corresponding to a user operation to the control unit 949.

The control unit 949 is configured using a CPU, a memory, and the like. The memory stores programs executed by the CPU and various data necessary for the CPU to perform processing. The program stored in the memory is read and executed by the CPU at a predetermined timing such as when the recording / reproducing apparatus 940 is activated. The CPU executes the program to control each unit so that the recording / reproducing device 940 operates according to the user operation.

In the thus configured recording / reproducing apparatus, the encoder 943 is provided with the function of the encoding apparatus (encoding method) of the present application, and the decoder 947 is provided with the function of the decoding apparatus (decoding method) of the present application. For this reason, the load of the decoding process can be reduced. Also, the encoded data encoded so as to reduce the load of the decoding process can be decoded.

<Sixth embodiment>
(Configuration example of imaging device)
FIG. 17 illustrates a schematic configuration of an imaging apparatus to which the present disclosure is applied. The imaging device 960 images a subject, displays an image of the subject on a display unit, and records it on a recording medium as image data.

The imaging device 960 includes an optical block 961, an imaging unit 962, a camera signal processing unit 963, an image data processing unit 964, a display unit 965, an external interface unit 966, a memory unit 967, a media drive 968, an OSD unit 969, and a control unit 970. Have. In addition, a user interface unit 971 is connected to the control unit 970. Furthermore, the image data processing unit 964, the external interface unit 966, the memory unit 967, the media drive 968, the OSD unit 969, the control unit 970, and the like are connected via a bus 972.

The optical block 961 is configured using a focus lens, a diaphragm mechanism, and the like. The optical block 961 forms an optical image of the subject on the imaging surface of the imaging unit 962. The imaging unit 962 is configured using a CCD or CMOS image sensor, generates an electrical signal corresponding to the optical image by photoelectric conversion, and supplies the electrical signal to the camera signal processing unit 963.

The camera signal processing unit 963 performs various camera signal processing such as knee correction, gamma correction, and color correction on the electrical signal supplied from the imaging unit 962. The camera signal processing unit 963 supplies the image data after the camera signal processing to the image data processing unit 964.

The image data processing unit 964 performs an encoding process on the image data supplied from the camera signal processing unit 963. The image data processing unit 964 supplies the encoded data generated by performing the encoding process to the external interface unit 966 and the media drive 968. Further, the image data processing unit 964 performs a decoding process on the encoded data supplied from the external interface unit 966 and the media drive 968. The image data processing unit 964 supplies the image data generated by performing the decoding process to the display unit 965. Further, the image data processing unit 964 superimposes the processing for supplying the image data supplied from the camera signal processing unit 963 to the display unit 965 and the display data acquired from the OSD unit 969 on the image data. To supply.

The OSD unit 969 generates display data such as a menu screen and icons made up of symbols, characters, or figures and outputs them to the image data processing unit 964.

The external interface unit 966 includes, for example, a USB input / output terminal, and is connected to a printer when printing an image. In addition, a drive is connected to the external interface unit 966 as necessary, a removable medium such as a magnetic disk or an optical disk is appropriately mounted, and a computer program read from them is installed as necessary. Furthermore, the external interface unit 966 has a network interface connected to a predetermined network such as a LAN or the Internet. For example, the control unit 970 reads encoded data from the media drive 968 in accordance with an instruction from the user interface unit 971, and supplies the encoded data to the other device connected via the network from the external interface unit 966. it can. Also, the control unit 970 may acquire encoded data and image data supplied from another device via the network via the external interface unit 966 and supply the acquired data to the image data processing unit 964. it can.

As the recording medium driven by the media drive 968, any readable / writable removable medium such as a magnetic disk, a magneto-optical disk, an optical disk, or a semiconductor memory is used. The recording medium may be any type of removable medium, and may be a tape device, a disk, or a memory card. Of course, a non-contact IC (Integrated Circuit) card may be used.

Further, the media drive 968 and the recording medium may be integrated and configured by a non-portable storage medium such as a built-in hard disk drive or an SSD (Solid State Drive).

The control unit 970 is configured using a CPU. The memory unit 967 stores a program executed by the control unit 970, various data necessary for the control unit 970 to perform processing, and the like. The program stored in the memory unit 967 is read and executed by the control unit 970 at a predetermined timing such as when the imaging device 960 is activated. The control unit 970 controls each unit so that the imaging device 960 performs an operation according to a user operation by executing a program.

In the imaging apparatus configured as described above, the image data processing unit 964 is provided with the functions of the encoding apparatus and decoding apparatus (encoding method and decoding method) of the present application. For this reason, the load of the decoding process can be reduced. Also, the encoded data encoded so as to reduce the load of the decoding process can be decoded.

<Seventh embodiment>
(Other examples of implementation)
In the above, examples of apparatuses and systems to which the present disclosure is applied have been described. However, the present disclosure is not limited thereto, and any configuration mounted on such apparatuses or apparatuses constituting the system, for example, system LSI (Large Scale) Integration) etc., a module using a plurality of processors, etc., a unit using a plurality of modules, etc., a set in which other functions are added to the unit, etc. (that is, a partial configuration of the apparatus) .

(Video set configuration example)
An example of implementing the present disclosure as a set will be described with reference to FIG. FIG. 18 illustrates an example of a schematic configuration of a video set to which the present disclosure is applied.

In recent years, multi-functionalization of electronic devices has progressed, and in the development and manufacture, when implementing a part of the configuration as sales or provision, etc., not only when implementing as a configuration having one function, but also related In many cases, a plurality of configurations having functions are combined and implemented as a set having a plurality of functions.

The video set 1300 shown in FIG. 18 has such a multi-functional configuration, and a device having a function relating to image encoding and decoding (either or both of them) can be used for the function. It is a combination of devices having other related functions.

As shown in FIG. 18, the video set 1300 includes a module group such as a video module 1311, an external memory 1312, a power management module 1313, and a front end module 1314, and an associated module 1321, a camera 1322, a sensor 1323, and the like. And a device having a function.

A cocoon module is a component that has several functions that are related to each other and that have a coherent function. The specific physical configuration is arbitrary. For example, a plurality of processors each having a function, electronic circuit elements such as resistors and capacitors, and other devices arranged on a wiring board or the like can be considered. . It is also possible to combine the module with another module, a processor, or the like to form a new module.

In the example of FIG. 18, the video module 1311 is a combination of configurations having functions related to image processing, and includes an application processor, a video processor, a broadband modem 1333, and an RF module 1334.

The processor is a configuration in which a configuration having a predetermined function is integrated on a semiconductor chip by an SoC (System On Chip), and for example, there is also a system LSI (Large Scale Integration) or the like. The configuration having the predetermined function may be a logic circuit (hardware configuration), a CPU, a ROM, a RAM, and the like, and a program (software configuration) executed using them. , Or a combination of both. For example, a processor has a logic circuit and a CPU, ROM, RAM, etc., a part of the function is realized by a logic circuit (hardware configuration), and other functions are executed by the CPU (software configuration) It may be realized by.

The application processor 1331 in FIG. 18 is a processor that executes an application relating to image processing. The application executed in the application processor 1331 not only performs arithmetic processing to realize a predetermined function, but also can control the internal and external configurations of the video module 1311 such as the video processor 1332 as necessary. .

The video processor 1332 is a processor having a function related to image encoding / decoding (one or both of them).

The broadband modem 1333 is a processor (or module) that performs processing related to wired or wireless (or both) broadband communication performed via a broadband line such as the Internet or a public telephone line network. For example, the broadband modem 1333 digitally modulates data to be transmitted (digital signal) to convert it into an analog signal, or demodulates the received analog signal to convert it into data (digital signal). For example, the broadband modem 1333 can digitally modulate and demodulate arbitrary information such as image data processed by the video processor 1332, a stream obtained by encoding the image data, an application program, setting data, and the like.

The RF module 1334 is a module that performs frequency conversion, modulation / demodulation, amplification, filter processing, and the like on an RF (Radio RF Frequency) signal transmitted and received via an antenna. For example, the RF module 1334 generates an RF signal by performing frequency conversion or the like on the baseband signal generated by the broadband modem 1333. Further, for example, the RF module 1334 generates a baseband signal by performing frequency conversion or the like on the RF signal received via the front end module 1314.

Note that, as indicated by a dotted line 1341 in FIG. 18, the application processor 1331 and the video processor 1332 may be integrated into a single processor.

The external memory 1312 is a module having a storage device that is provided outside the video module 1311 and is used by the video module 1311. The storage device of the external memory 1312 may be realized by any physical configuration, but is generally used for storing a large amount of data such as image data in units of frames. For example, it is desirable to realize it with a relatively inexpensive and large-capacity semiconductor memory such as DRAM (Dynamic Random Access Memory).

The power management module 1313 manages and controls power supply to the video module 1311 (each component in the video module 1311).

The front end module 1314 is a module that provides the RF module 1334 with a front end function (a circuit on a transmitting / receiving end on the antenna side). As illustrated in FIG. 18, the front end module 1314 includes, for example, an antenna unit 1351, a filter 1352, and an amplification unit 1353.

Antenna unit 1351 has an antenna for transmitting and receiving a radio signal and its peripheral configuration. The antenna unit 1351 transmits the signal supplied from the amplification unit 1353 as a radio signal, and supplies the received radio signal to the filter 1352 as an electric signal (RF signal). The filter 1352 performs a filtering process on the RF signal received via the antenna unit 1351 and supplies the processed RF signal to the RF module 1334. The amplifying unit 1353 amplifies the RF signal supplied from the RF module 1334 and supplies the amplified RF signal to the antenna unit 1351.

Connectivity 1321 is a module having a function related to connection with the outside. The physical configuration of the connectivity 1321 is arbitrary. For example, the connectivity 1321 has a configuration having a communication function other than the communication standard supported by the broadband modem 1333, an external input / output terminal, and the like.

For example, the communication 1321 is compliant with wireless communication standards such as Bluetooth (registered trademark), IEEE 802.11 (for example, Wi-Fi (Wireless Fidelity, registered trademark)), NFC (Near Field Communication), IrDA (InfraRed Data Association), etc. You may make it have a module which has a function, an antenna etc. which transmit / receive the signal based on the standard. Further, for example, the connectivity 1321 has a module having a communication function compliant with a wired communication standard such as USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface), or a terminal compliant with the standard. You may do it. Further, for example, the connectivity 1321 may have other data (signal) transmission functions such as analog input / output terminals.

It should be noted that the connectivity 1321 may include a data (signal) transmission destination device. For example, the drive 1321 reads and writes data to and from a recording medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory (not only a removable medium drive, but also a hard disk, SSD (Solid State Drive) NAS (including Network Attached Storage) and the like. In addition, the connectivity 1321 may include an image or audio output device (a monitor, a speaker, or the like).

The eyelid camera 1322 is a module having a function of capturing an image of a subject and obtaining image data of the subject. Image data obtained by imaging by the camera 1322 is supplied to, for example, a video processor 1332 and encoded.

The sensor 1323 includes, for example, a voice sensor, an ultrasonic sensor, an optical sensor, an illuminance sensor, an infrared sensor, an image sensor, a rotation sensor, an angle sensor, an angular velocity sensor, a velocity sensor, an acceleration sensor, an inclination sensor, a magnetic identification sensor, an impact sensor, It is a module having an arbitrary sensor function such as a temperature sensor. For example, the data detected by the sensor 1323 is supplied to the application processor 1331 and used by an application or the like.

The configuration described above as a module may be realized as a processor, or conversely, the configuration described as a processor may be realized as a module.

In the video set 1300 having the above configuration, the present disclosure can be applied to the video processor 1332 as described later. Accordingly, the video set 1300 can be implemented as a set to which the present disclosure is applied.

(Video processor configuration example)
FIG. 19 illustrates an example of a schematic configuration of a video processor 1332 (FIG. 18) to which the present disclosure is applied.

In the case of the example of FIG. 19, the video processor 1332 receives the video signal and the audio signal, encodes them in a predetermined method, decodes the encoded video data and audio data, A function of reproducing and outputting an audio signal.

As shown in FIG. 19, the video processor 1332 includes a video input processing unit 1401, a first image enlargement / reduction unit 1402, a second image enlargement / reduction unit 1403, a video output processing unit 1404, a frame memory 1405, and a memory control unit 1406. Have The video processor 1332 includes an encoding / decoding engine 1407, video ES (ElementaryElementStream) buffers 1408A and 1408B, and audio ES buffers 1409A and 1409B. Further, the video processor 1332 includes an audio encoder 1410, an audio decoder 1411, a multiplexing unit (MUX (Multiplexer)) 1412, a demultiplexing unit (DMUX (Demultiplexer)) 1413, and a stream buffer 1414.

The video input processing unit 1401 acquires a video signal input from, for example, the connectivity 1321 (FIG. 18) and converts it into digital image data. The first image enlargement / reduction unit 1402 performs format conversion, image enlargement / reduction processing, and the like on the image data. The second image enlargement / reduction unit 1403 performs image enlargement / reduction processing on the image data in accordance with the format of the output destination via the video output processing unit 1404, or is the same as the first image enlargement / reduction unit 1402. Format conversion and image enlargement / reduction processing. The video output processing unit 1404 performs format conversion, conversion to an analog signal, and the like on the image data and outputs the reproduced video signal to, for example, the connectivity 1321 (FIG. 18).

The frame memory 1405 is a memory for image data shared by the video input processing unit 1401, the first image scaling unit 1402, the second image scaling unit 1403, the video output processing unit 1404, and the encoding / decoding engine 1407. . The frame memory 1405 is realized as a semiconductor memory such as a DRAM, for example.

The memory control unit 1406 receives the synchronization signal from the encoding / decoding engine 1407, and controls the writing / reading access to the frame memory 1405 according to the access schedule to the frame memory 1405 written in the access management table 1406A. The access management table 1406A is updated by the memory control unit 1406 in accordance with processing executed by the encoding / decoding engine 1407, the first image enlargement / reduction unit 1402, the second image enlargement / reduction unit 1403, and the like.

The encoding / decoding engine 1407 performs encoding processing of image data and decoding processing of a video stream that is data obtained by encoding the image data. For example, the encoding / decoding engine 1407 encodes the image data read from the frame memory 1405 and sequentially writes the data as a video stream in the video ES buffer 1408A. Further, for example, the video stream is sequentially read from the video ES buffer 1408B, decoded, and sequentially written in the frame memory 1405 as image data. The encoding / decoding engine 1407 uses the frame memory 1405 as a work area in the encoding and decoding. Also, the encoding / decoding engine 1407 outputs a synchronization signal to the memory control unit 1406, for example, at a timing at which processing for each macroblock is started.

The video ES buffer 1408A buffers the video stream generated by the encoding / decoding engine 1407 and supplies the buffered video stream to the multiplexing unit (MUX) 1412. The video ES buffer 1408B buffers the video stream supplied from the demultiplexer (DMUX) 1413 and supplies the buffered video stream to the encoding / decoding engine 1407.

The audio ES buffer 1409A buffers the audio stream generated by the audio encoder 1410 and supplies the buffered audio stream to the multiplexing unit (MUX) 1412. The audio ES buffer 1409B buffers the audio stream supplied from the demultiplexer (DMUX) 1413 and supplies the buffered audio stream to the audio decoder 1411.

The audio encoder 1410 converts, for example, an audio signal input from the connectivity 1321 (FIG. 18), for example, into a digital format, and encodes the audio signal according to a predetermined method such as the MPEG audio method or the AC3 (Audio Code number 3) method. The audio encoder 1410 sequentially writes an audio stream, which is data obtained by encoding an audio signal, in the audio ES buffer 1409A. The audio decoder 1411 decodes the audio stream supplied from the audio ES buffer 1409B, performs conversion to, for example, an analog signal, and supplies the reproduced audio signal to, for example, the connectivity 1321 (FIG. 18).

Multiplexer (MUX) 1412 multiplexes the video stream and the audio stream. The multiplexing method (that is, the format of the bit stream generated by multiplexing) is arbitrary. At the time of this multiplexing, the multiplexing unit (MUX) 1412 can also add predetermined header information or the like to the bit stream. That is, the multiplexing unit (MUX) 1412 can convert the stream format by multiplexing. For example, the multiplexing unit (MUX) 1412 multiplexes the video stream and the audio stream to convert it into a transport stream that is a bit stream in a transfer format. Further, for example, the multiplexing unit (MUX) 1412 multiplexes the video stream and the audio stream, thereby converting the data into file format data (file data) for recording.

The demultiplexing unit (DMUX) 1413 demultiplexes the bit stream in which the video stream and the audio stream are multiplexed by a method corresponding to the multiplexing by the multiplexing unit (MUX) 1412. That is, the demultiplexer (DMUX) 1413 extracts the video stream and the audio stream from the bit stream read from the stream buffer 1414 (separates the video stream and the audio stream). That is, the demultiplexer (DMUX) 1413 can convert the stream format by demultiplexing (inverse conversion of the conversion by the multiplexer (MUX) 1412). For example, the demultiplexer (DMUX) 1413 obtains a transport stream supplied from, for example, the connectivity 1321 and the broadband modem 1333 (both in FIG. 18) via the stream buffer 1414, and demultiplexes the transport stream. Can be converted into a video stream and an audio stream. Further, for example, the demultiplexer (DMUX) 1413 obtains the file data read from various recording media by the connectivity 1321 (FIG. 18) via the stream buffer 1414 and demultiplexes the file data, for example. It can be converted into a video stream and an audio stream.

The stream buffer 1414 buffers the bit stream. For example, the stream buffer 1414 buffers the transport stream supplied from the multiplexing unit (MUX) 1412 and, for example, at the predetermined timing or based on a request from the outside, for example, the connectivity 1321 or the broadband modem 1333 (whichever Are also supplied to FIG.

Further, for example, the stream buffer 1414 buffers the file data supplied from the multiplexing unit (MUX) 1412 and, for example, connectivity 1321 (FIG. 18) or the like at a predetermined timing or based on an external request or the like. To be recorded on various recording media.

Further, the stream buffer 1414 buffers the transport stream acquired through, for example, the connectivity 1321 and the broadband modem 1333 (both in FIG. 18), and performs reverse processing at a predetermined timing or based on an external request or the like. The data is supplied to a multiplexing unit (DMUX) 1413.

In addition, the stream buffer 1414 buffers file data read from various recording media in, for example, the connectivity 1321 (FIG. 18), and the demultiplexing unit at a predetermined timing or based on an external request or the like. (DMUX) 1413.

Next, an example of the operation of the video processor 1332 having such a configuration will be described. For example, a video signal input from the connectivity 1321 (FIG. 18) or the like to the video processor 1332 is converted into digital image data of a predetermined format such as 4: 2: 2Y / Cb / Cr format in the video input processing unit 1401. The data is sequentially written into the frame memory 1405. This digital image data is read by the first image enlargement / reduction unit 1402 or the second image enlargement / reduction unit 1403, and format conversion to a predetermined method such as 4: 2: 0Y / Cb / Cr method and enlargement / reduction processing are performed. Is written again in the frame memory 1405. This image data is encoded by the encoding / decoding engine 1407 and written as a video stream in the video ES buffer 1408A.

In addition, an audio signal input to the video processor 1332 from the connectivity 1321 (FIG. 18) or the like is encoded by the audio encoder 1410 and written as an audio stream in the audio ES buffer 1409A.

The video stream of the video ES buffer 1408A and the audio stream of the audio ES buffer 1409A are read and multiplexed by the multiplexing unit (MUX) 1412 and converted into a transport stream or file data. The transport stream generated by the multiplexing unit (MUX) 1412 is buffered in the stream buffer 1414 and then output to the external network via, for example, the connectivity 1321 and the broadband modem 1333 (both of which are shown in FIG. 18). Further, the file data generated by the multiplexing unit (MUX) 1412 is buffered in the stream buffer 1414, and then output to, for example, the connectivity 1321 (FIG. 18) and recorded on various recording media.

Further, for example, the transport stream input from the external network to the video processor 1332 through the connectivity 1321 or the broadband modem 1333 (both in FIG. 18) is buffered in the stream buffer 1414 and then demultiplexed (DMUX) 1413 is demultiplexed. Further, for example, file data read from various recording media in the connectivity 1321 (FIG. 18) and input to the video processor 1332 is buffered in the stream buffer 1414 and then demultiplexed by the demultiplexer (DMUX) 1413. It becomes. That is, the transport stream or file data input to the video processor 1332 is separated into a video stream and an audio stream by the demultiplexer (DMUX) 1413.

The audio stream is supplied to the audio decoder 1411 via the audio ES buffer 1409B and decoded to reproduce the audio signal. The video stream is written to the video ES buffer 1408B, and then sequentially read and decoded by the encoding / decoding engine 1407, and written to the frame memory 1405. The decoded image data is enlarged / reduced by the second image enlargement / reduction unit 1403 and written to the frame memory 1405. The decoded image data is read out to the video output processing unit 1404, format-converted to a predetermined system such as 4: 2: 2Y / Cb / Cr system, and further converted into an analog signal to be converted into a video signal. Is played out.

場合 When the present disclosure is applied to the video processor 1332 configured as described above, the present disclosure according to each of the above-described embodiments may be applied to the encoding / decoding engine 1407. That is, for example, the encoding / decoding engine 1407 may have the functions of the encoding device and the decoding device according to the first to third embodiments. In this way, the video processor 1332 can obtain the same effects as those described above with reference to FIGS.

Note that in the encoding / decoding engine 1407, the present disclosure (that is, the functions of the encoding device and the decoding device according to each of the above-described embodiments) may be realized by hardware such as a logic circuit or an embedded program. It may be realized by software such as the above, or may be realized by both of them.

(Another configuration example of the video processor)
FIG. 20 illustrates another example of a schematic configuration of the video processor 1332 (FIG. 18) to which the present disclosure is applied. In the example of FIG. 20, the video processor 1332 has a function of encoding and decoding video data by a predetermined method.

More specifically, as shown in FIG. 20, the video processor 1332 includes a control unit 1511, a display interface 1512, a display engine 1513, an image processing engine 1514, and an internal memory 1515. The video processor 1332 includes a codec engine 1516, a memory interface 1517, a multiplexing / demultiplexing unit (MUX DMUX) 1518, a network interface 1519, and a video interface 1520.

The eyelid control unit 1511 controls the operation of each processing unit in the video processor 1332 such as the display interface 1512, the display engine 1513, the image processing engine 1514, and the codec engine 1516.

As illustrated in FIG. 20, the control unit 1511 includes, for example, a main CPU 1531, a sub CPU 1532, and a system controller 1533. The main CPU 1531 executes a program and the like for controlling the operation of each processing unit in the video processor 1332. The main CPU 1531 generates a control signal according to the program and supplies it to each processing unit (that is, controls the operation of each processing unit). The sub CPU 1532 plays an auxiliary role of the main CPU 1531. For example, the sub CPU 1532 executes a child process such as a program executed by the main CPU 1531, a subroutine, or the like. The system controller 1533 controls operations of the main CPU 1531 and the sub CPU 1532 such as designating a program to be executed by the main CPU 1531 and the sub CPU 1532.

The display interface 1512 outputs image data to, for example, the connectivity 1321 (FIG. 18) or the like under the control of the control unit 1511. For example, the display interface 1512 converts image data of digital data into an analog signal, and outputs it to a monitor device of the connectivity 1321 (FIG. 18) or the like as a reproduced video signal or as image data of digital data.

Under the control of the control unit 1511, the display engine 1513 performs various conversion processes such as format conversion, size conversion, color gamut conversion, and the like so as to match the image data with hardware specifications such as a monitor device that displays the image. I do.

The eyelid image processing engine 1514 performs predetermined image processing such as filter processing for improving image quality on the image data under the control of the control unit 1511.

The internal memory 1515 is a memory provided inside the video processor 1332 that is shared by the display engine 1513, the image processing engine 1514, and the codec engine 1516. The internal memory 1515 is used, for example, for data exchange performed between the display engine 1513, the image processing engine 1514, and the codec engine 1516. For example, the internal memory 1515 stores data supplied from the display engine 1513, the image processing engine 1514, or the codec engine 1516, and stores the data as needed (eg, upon request). This is supplied to the image processing engine 1514 or the codec engine 1516. The internal memory 1515 may be realized by any storage device, but is generally used for storing a small amount of data such as image data or parameters in units of blocks. It is desirable to realize a semiconductor memory having a relatively small capacity but a high response speed (for example, as compared with the external memory 1312) such as “Static Random Access Memory”.

The codec engine 1516 performs processing related to encoding and decoding of image data. The encoding / decoding scheme supported by the codec engine 1516 is arbitrary, and the number thereof may be one or plural. For example, the codec engine 1516 may be provided with codec functions of a plurality of encoding / decoding schemes, and may be configured to perform encoding of image data or decoding of encoded data using one selected from them.

In the example illustrated in FIG. 20, the codec engine 1516 includes, for example, MPEG-2 video 1541, AVC / H.2641542, HEVC / H.2651543, HEVC / H.265 (Scalable) 1544, as function blocks for processing related to the codec. HEVC / H.265 (Multi-view) 1545 and MPEG-DASH 1551 are included.

“MPEG-2” Video 1541 is a functional block that encodes and decodes image data in the MPEG-2 format. AVC / H.2641542 is a functional block that encodes and decodes image data in the AVC / H.264 format. HEVC / H.2651543 is a functional block that encodes and decodes image data using HEVC. HEVC / H.265 (Scalable) 1544 is a functional block that performs scalable encoding and scalable decoding of image data using HEVC. HEVC / H.265 (Multi-view) 1545 is a functional block that multi-view encodes or multi-view decodes image data using HEVC.

“MPEG-DASH 1551” is a functional block that transmits and receives image data in the MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) method. MPEG-DASH is a technology for streaming video using HTTP (HyperText Transfer Protocol), and selects and transmits appropriate data from multiple encoded data with different resolutions prepared in advance in segments. This is one of the features. MPEG-DASH 1551 generates a stream compliant with the standard, controls transmission of the stream, and the like. For encoding / decoding of image data, MPEG-2 Video 1541 to HEVC / H.265 (Multi-view) 1545 described above are used. Is used.

The memory interface 1517 is an interface for the external memory 1312. Data supplied from the image processing engine 1514 or the codec engine 1516 is supplied to the external memory 1312 via the memory interface 1517. The data read from the external memory 1312 is supplied to the video processor 1332 (the image processing engine 1514 or the codec engine 1516) via the memory interface 1517.

A multiplexing / demultiplexing unit (MUX DMUX) 1518 multiplexes and demultiplexes various data related to images such as a bit stream of encoded data, image data, and a video signal. This multiplexing / demultiplexing method is arbitrary. For example, at the time of multiplexing, the multiplexing / demultiplexing unit (MUX DMUX) 1518 can not only combine a plurality of data into one but also add predetermined header information or the like to the data. Further, in the demultiplexing, the multiplexing / demultiplexing unit (MUX DMUX) 1518 not only divides one data into a plurality of data but also adds predetermined header information or the like to each divided data. it can. That is, the multiplexing / demultiplexing unit (MUX DMUX) 1518 can convert the data format by multiplexing / demultiplexing. For example, the multiplexing / demultiplexing unit (MUX DMUX) 1518 multiplexes the bitstream, thereby transporting the transport stream, which is a bit stream in a transfer format, or data in a file format for recording (file data). Can be converted to Of course, the inverse transformation is also possible by demultiplexing.

The network interface 1519 is an interface for a broadband modem 1333, connectivity 1321 (both in FIG. 18), and the like. The video interface 1520 is an interface for, for example, the connectivity 1321 and the camera 1322 (both are FIG. 18).

Next, an example of the operation of the video processor 1332 will be described. For example, when a transport stream is received from an external network via, for example, the connectivity 1321 or the broadband modem 1333 (both of which are shown in FIG. 18), the transport stream is transmitted to the multiplexing / demultiplexing unit (MUX) via the network interface 1519. DMUX) 1518 is demultiplexed and decoded by the codec engine 1516. For example, the image data obtained by decoding by the codec engine 1516 is subjected to predetermined image processing by the image processing engine 1514, subjected to predetermined conversion by the display engine 1513, and connected to, for example, the connectivity 1321 (see FIG. 18), and the image is displayed on the monitor. Also, for example, image data obtained by decoding by the codec engine 1516 is re-encoded by the codec engine 1516, multiplexed by a multiplexing / demultiplexing unit (MUX DMUX) 1518, converted into file data, and video The data is output to, for example, the connectivity 1321 (FIG. 18) via the interface 1520 and recorded on various recording media.

Further, for example, encoded data file data obtained by encoding image data read from a recording medium (not shown) by the connectivity 1321 (FIG. 18) or the like is multiplexed / demultiplexed via the video interface 1520. Is supplied to a unit (MUX DMUX) 1518, demultiplexed, and decoded by the codec engine 1516. Image data obtained by decoding by the codec engine 1516 is subjected to predetermined image processing by the image processing engine 1514, subjected to predetermined conversion by the display engine 1513, and, for example, connectivity 1321 via the display interface 1512 (FIG. 18). And the image is displayed on the monitor. Also, for example, image data obtained by decoding by the codec engine 1516 is re-encoded by the codec engine 1516, multiplexed by the multiplexing / demultiplexing unit (MUX DMUX) 1518, and converted into a transport stream, For example, the connectivity 1321 and the broadband modem 1333 (both in FIG. 18) are supplied via the network interface 1519 and transmitted to another device (not shown).

Note that image data and other data are exchanged between the processing units in the video processor 1332 using, for example, the internal memory 1515 and the external memory 1312. The power management module 1313 controls power supply to the control unit 1511, for example.

場合 When the present disclosure is applied to the video processor 1332 configured as described above, the present disclosure according to each embodiment described above may be applied to the codec engine 1516. That is, for example, the codec engine 1516 may have a functional block that realizes the encoding device and the decoding device according to the first to third embodiments. With the codec engine 1516 doing in this way, the video processor 1332 can obtain the same effects as those described above with reference to FIGS. 6 to 13.

Note that in the codec engine 1516, the present disclosure (that is, the functions of the encoding device and the decoding device according to each of the above-described embodiments) may be realized by hardware such as a logic circuit, an embedded program, or the like. It may be realized by software, or may be realized by both of them.

Although two examples of the configuration of the video processor 1332 have been described above, the configuration of the video processor 1332 is arbitrary and may be other than the two examples described above. The video processor 1332 may be configured as one semiconductor chip, but may be configured as a plurality of semiconductor chips. For example, a three-dimensional stacked LSI in which a plurality of semiconductors are stacked may be used. Further, it may be realized by a plurality of LSIs.

(Application example for equipment)
Video set 1300 can be incorporated into various devices that process image data. For example, the video set 1300 can be incorporated in the television device 900 (FIG. 14), the mobile phone 920 (FIG. 15), the recording / reproducing device 940 (FIG. 16), the imaging device 960 (FIG. 17), or the like. By incorporating the video set 1300, the apparatus can obtain the same effects as those described above with reference to FIGS.

Note that even a part of each configuration of the video set 1300 described above can be implemented as a configuration to which the present disclosure is applied as long as it includes the video processor 1332. For example, only the video processor 1332 can be implemented as a video processor to which the present disclosure is applied. For example, as described above, the processor, the video module 1311, and the like indicated by the dotted line 1341 can be implemented as a processor, a module, or the like to which the present disclosure is applied. Furthermore, for example, the video module 1311, the external memory 1312, the power management module 1313, and the front end module 1314 can be combined and implemented as a video unit 1361 to which the present disclosure is applied. In any case, the same effects as those described above with reference to FIGS. 6 to 13 can be obtained.

That is, any configuration including the video processor 1332 can be incorporated into various devices that process image data, as in the case of the video set 1300. For example, a video processor 1332, a processor indicated by a dotted line 1341, a video module 1311, or a video unit 1361, a television device 900 (FIG. 14), a mobile phone 920 (FIG. 15), a recording / playback device 940 (FIG. 16), It can be incorporated in an imaging device 960 (FIG. 17) or the like. Then, by incorporating any configuration to which the present disclosure is applied, the apparatus can obtain the same effects as those described above with reference to FIGS. 6 to 13 as in the case of the video set 1300. .

In the present specification, an example in which various types of information are multiplexed into encoded data and transmitted from the encoding side to the decoding side has been described. However, the method for transmitting such information is not limited to such an example. For example, these pieces of information may be transmitted or recorded as separate data associated with the encoded data without being multiplexed with the encoded data. Here, the term “associate” means that an image (which may be a part of an image such as a slice or a block) included in the bitstream and information corresponding to the image can be linked at the time of decoding. Means. That is, the information may be transmitted on a transmission path different from the encoded data. The information may be recorded on a recording medium different from the encoded data (or another recording area of the same recording medium). Furthermore, the information and the encoded data may be associated with each other in an arbitrary unit such as a plurality of frames, one frame, or a part of the frame.

This disclosure receives bitstreams compressed by orthogonal transform such as discrete cosine transform and motion compensation, such as MPEG, H.26x, etc., via network media such as satellite broadcasting, cable TV, the Internet, and mobile phones. The present invention can be applied to an encoding device or a decoding device that is used when processing on a storage medium such as an optical, magnetic disk, or flash memory.

In this specification, the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .

Furthermore, the effects described in the present specification are merely examples and are not limited, and may have other effects.

The embodiments of the present disclosure are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present disclosure.

For example, the present disclosure can take a cloud computing configuration in which one function is shared by a plurality of devices via a network and is processed jointly.

Further, each step described in the above flowchart can be executed by one device or can be shared by a plurality of devices.

Further, when a plurality of processes are included in one step, the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.

This disclosure can have the following configurations.

(1)
An image processing apparatus comprising: a setting unit configured to set prediction information indicating that an image has been encoded using motion prediction using correlation in a screen in encoded data of the image.
(2)
The image is divided into one or more slices and encoded;
The setting unit sets the prediction information in a slice header added to the encoded data of the slice when the slice is encoded using motion prediction using correlation in the screen. The image processing apparatus according to (1), configured as described above.
(3)
The image processing apparatus according to (1) or (2), wherein the prediction information is information indicating that an image is encoded using Intra BC prediction or Intra prediction.
(4)
The image processing device
An image processing method comprising: a setting step of setting prediction information indicating that an image has been encoded using motion prediction using correlation within a screen in encoded data of the image.
(5)
An image processing apparatus comprising: a decoding unit that decodes encoded data of an image based on prediction information indicating that the image is encoded using motion prediction using correlation in a screen.
(6)
The image is divided into one or more slices and encoded;
The prediction information is configured to be set in a slice header added to the encoded data of the slice when the slice is encoded using motion prediction using correlation in the screen. The image processing apparatus according to (5).
(7)
The image processing apparatus according to (5) or (6), wherein the prediction information is information indicating that an image is encoded using Intra BC prediction or Intra prediction.
(8)
The image processing device
An image processing method comprising: a decoding step of decoding encoded data of the image based on prediction information indicating that the image is encoded using motion prediction using correlation within a screen.

70 Encoder, 78 Generator, 130 Decoder, 135 Adder

Claims

An image processing apparatus comprising: a setting unit configured to set prediction information indicating that an image has been encoded using motion prediction using correlation in a screen in encoded data of the image.
The image is divided into one or more slices and encoded;
The setting unit sets the prediction information in a slice header added to the encoded data of the slice when the slice is encoded using motion prediction using correlation in the screen. The image processing apparatus according to claim 1, which is configured as follows.
The image processing apparatus according to claim 1, wherein the prediction information is information indicating that an image is encoded using Intra BC prediction or Intra prediction.
The image processing device
An image processing method comprising: a setting step of setting prediction information indicating that an image has been encoded using motion prediction using correlation within a screen in encoded data of the image.
An image processing apparatus comprising: a decoding unit that decodes encoded data of an image based on prediction information indicating that the image is encoded using motion prediction using correlation in a screen.
The image is divided into one or more slices and encoded;
The prediction information is configured to be set in a slice header added to the encoded data of the slice when the slice is encoded using motion prediction using correlation in the screen. The image processing apparatus according to claim 5.
The image processing apparatus according to claim 5, wherein the prediction information is information representing that an image is encoded using Intra BC prediction or Intra prediction.
The image processing device
An image processing method comprising: a decoding step of decoding encoded data of the image based on prediction information indicating that the image is encoded using motion prediction using correlation within a screen.