WO2015151791A1 - 画像復号装置および方法 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
- H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
- H04N19/82—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation involving filtering within a prediction loop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/96—Tree coding, e.g. quad-tree coding
Definitions
- the present disclosure relates to an image decoding apparatus and method, and more particularly to an image decoding apparatus and method capable of suppressing an increase in the load of decoding processing.
- HEVC High Efficiency Video Coding
- the present disclosure has been made in view of such a situation, and makes it possible to suppress an increase in the load of decoding processing.
- a decoding unit that generates decoded image data by decoding encoded data obtained by encoding image data for each CU (Coding Unit) that is recursively divided, and the encoded data
- a filter processing unit that performs filter processing on the decoded image data generated by the decoding unit according to the information set for each data unit corresponding to the header information of
- the filter processing unit may perform the filter process on the decoded image data by skipping a reference to information set for each CU unit to be referred to when performing the filter process.
- the filter processing unit When the filter processing unit indicates that the condition for the value of the header information does not need to refer to the information set for each CU, the information set for each CU unit to be referred to when performing the filter process Reference to can be skipped.
- the filter processing unit can perform filter processing on the decoded image data in units of coding tree blocks (CTBs).
- CTBs coding tree blocks
- the filter processing unit can perform deblocking filter processing as the filter processing.
- the filter processing unit can skip the reference to the information set for each CU to be referred to when performing the filter processing, when the following expression is satisfied as the condition.
- the filter processing unit may skip reference to information set for each CU to be referred to when performing the filter processing, when the picture is configured of one slice.
- the filter processing unit refers to information set for each CU unit to be referred to when performing the filter process when slice_qp_delta of each slice header in the picture is the same when the picture is configured of a plurality of slices You can skip
- the filter processing unit can perform sample adaptive offset processing as the filter processing.
- the filter processing unit can skip the reference to the information set for each CU to be referred to when performing the filter processing, when the following expression is satisfied as the condition.
- decoded image data is generated by decoding encoded data obtained by encoding image data for each CU (Coding Unit) recursively divided, and generating encoded image data.
- the present invention is an image decoding method for performing filter processing on the generated decoded image data in accordance with information set for each data unit corresponding to header information.
- decoded image data is generated by decoding encoded data obtained by encoding image data for each CU (Coding Unit) that is recursively divided, and a header of the encoded data is generated.
- the filtering process is performed on the generated decoded image data according to the information set for each data unit corresponding to the information.
- encoded data obtained by encoding image data can be decoded.
- Fig. 24 is a diagram illustrating an example main configuration of a multi-viewpoint image decoding device to which the present technology is applied. It is a figure which shows the example of a hierarchy image coding system. It is a figure which shows the main structural examples of the hierarchy image coding apparatus to which this technique is applied. It is a figure which shows the main structural examples of the hierarchy image decoding apparatus to which this technique is applied. It is a block diagram showing an example of main composition of a computer. It is a block diagram showing an example of a schematic structure of a television set. It is a block diagram which shows an example of a rough structure of a mobile telephone.
- a coding tree block (Coding tree block)) is defined as a fixed size coding unit.
- the image data of one picture is divided and encoded by the CTB, and the encoded data of each CTB is decoded in order at the decoder.
- the CTB can be further divided into 8x8, 16x16, 32x32 and 64x64 coding units (CU (Coding Unit)).
- FIG. 1 is an example of division of a CU. In the case of the example of FIG. 1, one CTB is divided into 19 CUs.
- transquant_bypass_enabled_flag when the value of transquant_bypass_enabled_flag is “1”, flag information indicating whether to skip scaling, conversion processing, and loop filter in that CU for each CU There is cu_transquant_bypass_flag which is
- the pcm_flag of CU4 is “1”
- the cu_transquant_bypass_flag of CU10 is “1”.
- TU Transform Unit
- FIG. 3 is a diagram showing an example in which the value of Qp Y changes for each CU.
- CTB that is, in a picture
- a large number of CUs can be formed, and thus referring to the information of each CU may increase the load of filtering.
- ⁇ Filter control> Therefore, according to the information set for each data unit corresponding to the header information of the encoded data, the encoded data obtained by encoding the image data is decoded for each CU (Coding Unit) divided recursively. Filter processing is performed on the decoded image data generated by By doing this, it is possible to suppress the use of information of an unnecessarily small data unit, and to suppress an increase in the load of the decoding process.
- the header information is information for each layer (sequence / picture / slice / tile / maximum coding unit / coding unit etc.) prior to data set in each layer or information (to be referred to) or each layer. It means parsing (referring) information independently of the set data. For example, video parameter set (VPS (Video Parameter Set)), sequence parameter set (SPS (Sequence Parameter Set)), picture parameter set (PPS (Picture Parameter Set)), slice header (Slice Header), null unit type (nal_unit_typ) Information such as SEI (Supplemental Enhancement Information) corresponds to header information.
- the header information includes not only information explicitly defined as the syntax of the bit stream but also information located at the beginning of each layer.
- FIG. 4 is a block diagram illustrating an exemplary main configuration of an image decoding device which is an aspect of an image processing device to which the present technology is applied.
- the image decoding apparatus 100 shown in FIG. 4 decodes encoded data generated by the image encoding apparatus (not shown) encoding image data according to the HEVC encoding system.
- the image decoding apparatus 100 includes an accumulation buffer 111, a lossless decoding unit 112, an inverse quantization unit 113, an inverse orthogonal transformation unit 114, an operation unit 115, a loop filter 116, and a screen rearrangement buffer 117. .
- the image decoding apparatus 100 further includes a frame memory 118, an intra prediction unit 119, an inter prediction unit 120, and a predicted image selection unit 121.
- the image decoding apparatus 100 includes a filter control unit 122.
- the accumulation buffer 111 is also a receiving unit that receives the encoded data transmitted from the encoding side.
- the accumulation buffer 111 receives and accumulates the transmitted encoded data, and supplies the encoded data to the lossless decoding unit 112 at a predetermined timing.
- the lossless decoding unit 112 decodes the encoded data supplied from the accumulation buffer 111 using the HEVC method. For example, the lossless decoding unit 112 decodes the encoded data for each of CUs (coding units) that are recursively divided.
- the lossless decoding unit 112 supplies the quantized coefficient data obtained by decoding to the inverse quantization unit 113.
- the lossless decoding unit 112 determines whether the intra prediction mode is selected as the optimum prediction mode or the inter prediction mode is selected based on the information on the optimum prediction mode added to the encoded data, and the optimum The information on the prediction mode is supplied to the mode of the intra prediction unit 119 and the inter prediction unit 120 which is determined to be selected. For example, when the intra prediction mode is selected as the optimum prediction mode on the encoding side, information on the optimum prediction mode is supplied to the intra prediction unit 119. Also, for example, when the inter prediction mode is selected as the optimum prediction mode on the encoding side, information on the optimum prediction mode is supplied to the inter prediction unit 120.
- the lossless decoding unit 112 supplies information necessary for inverse quantization, such as a quantization matrix and a quantization parameter, to the inverse quantization unit 113.
- the lossless decoding unit 112 supplies header information such as a sequence parameter set (SPS), a picture parameter set (PPS), and a slice header to the filter control unit 122.
- SPS sequence parameter set
- PPS picture parameter set
- slice header a slice header
- the inverse quantization unit 113 inversely quantizes the quantized coefficient data obtained by being decoded by the lossless decoding unit 112 by a method corresponding to the encoding side quantization method.
- the inverse quantization unit 113 supplies the obtained coefficient data to the inverse orthogonal transform unit 114.
- the inverse orthogonal transformation unit 114 performs inverse orthogonal transformation on the orthogonal transformation coefficient supplied from the inverse quantization unit 113 according to a scheme corresponding to the orthogonal transformation scheme on the encoding side.
- the inverse orthogonal transformation unit 114 obtains residual data corresponding to a state before orthogonal transformation on the encoding side by the inverse orthogonal transformation processing. Residual data obtained by the inverse orthogonal transformation is supplied to the calculation unit 115.
- the operation unit 115 acquires residual data from the inverse orthogonal transform unit 114.
- the calculation unit 115 acquires a prediction image from the intra prediction unit 119 or the inter prediction unit 120 via the prediction image selection unit 121.
- the arithmetic unit 115 adds the difference image and the prediction image to obtain a reconstructed image corresponding to the image before the prediction image is subtracted on the encoding side.
- the calculation unit 115 supplies the reconstructed image to the loop filter 116 and the intra prediction unit 119.
- the loop filter 116 appropriately performs loop filter processing including deblock filter processing, SAO processing, and the like on the supplied reconstructed image to generate a decoded image.
- the loop filter 116 removes block distortion by performing deblocking filter processing on the reconstructed image.
- the loop filter 116 performs SAO processing on the deblock filter processing result (reconstructed image subjected to block distortion removal), thereby reducing ringing, correcting pixel value deviation, etc.
- the type of filter processing performed by the loop filter 116 is arbitrary, and filter processing other than that described above may be performed. Also, the loop filter 116 may perform filter processing using the filter coefficient supplied from the encoding side.
- the loop filter 116 supplies the decoded image, which is the filter processing result, to the screen rearrangement buffer 117 and the frame memory 118.
- the screen rearrangement buffer 117 rearranges the images. That is, the order of the frames rearranged for the order of encoding on the encoding side is rearranged to the order of the original display.
- the screen rearrangement buffer 117 outputs the decoded image data in which the order of the frames is rearranged to the outside of the image decoding apparatus 100.
- the frame memory 118 stores the supplied decoded image, and at the predetermined timing or based on an external request from the inter prediction unit 120 or the like, the inter prediction unit 120 uses the stored decoded image as a reference image. Supply.
- the intra prediction unit 119 performs intra prediction using the reconstructed image supplied from the calculation unit 115 as a reference image in the intra prediction mode used on the encoding side, and generates a prediction image.
- the intra prediction unit 119 supplies the generated predicted image to the predicted image selection unit 121.
- the inter prediction unit 120 acquires information (optimal prediction mode information, reference image information, and the like) obtained by decoding the header information from the lossless decoding unit 112.
- the inter prediction unit 120 performs inter prediction using the reference image acquired from the frame memory 118 in the inter prediction mode indicated by the optimal prediction mode information acquired from the lossless decoding unit 112, and generates a prediction image.
- the prediction image selection unit 121 supplies the prediction image from the intra prediction unit 119 or the prediction image from the inter prediction unit 120 to the calculation unit 115. Then, in the operation unit 115, the predicted image generated using the motion vector is added to the residual data supplied from the inverse orthogonal transform unit 114, and the original image is decoded. That is, a reconstructed image is generated.
- the filter control unit 122 acquires header information transmitted from the encoding side, such as, for example, a sequence parameter set (SPS), a picture parameter set (PPS), and a slice header, through the lossless decoding unit 112.
- the filter control unit 122 determines the data unit of the information used for the filtering process of the loop filter 116 based on the acquired header information. For example, the filter control unit 122 selects whether to use information in CU units.
- the filter control unit 122 generates filter control information for controlling the operation of the loop filter 116 so as to perform the loop filter process using the determined (selected) data unit information, and transmits the filter control information to the loop filter 116. Supply.
- FIG. 5 An example of the syntax of the sequence parameter set (SPS) is shown in FIG. 5 and FIG. As described above, when pcm_enabled_flag shown in the fourth line from the bottom of FIG. 5 is “1”, pcm_loop_filter_disabled_flag exists and pcm_flag exists for each CU as shown in the third line from the top of FIG. .
- the filter control unit 122 refers to various header information such as SPS and PPS, and generates filter control information based on the value.
- the filter control unit 122 includes a deblocking filter control information generation unit 131 and an SAO control information generation unit 132.
- the deblocking filter control information generation unit 131 refers to the header information such as SPS, PPS, slice header and the like supplied from the lossless decoding unit 112 to determine a data unit of information used for the deblocking filter process. For example, when the deblocking filter control information generation unit 131 indicates that the condition for the value of the header information indicates that it is not necessary to refer to the information set for each CU, the CU to be referred to when performing the filtering process. It skips the reference to the information set for each unit. In other words, for example, when the deblocking filter control information generation unit 131 indicates that the condition for the value of the header information indicates that the information set for each CU needs to be referred to, the filtering process is performed. Refer to the information set for each CU unit to be referred to.
- the deblocking filter control information generation unit 131 selects to use the information in units of CUs, based on the header information.
- the control information generation unit for deblocking filter 131 refers to pcm_loop_filter_disabled_flag (the third line from the top of FIG. 6) of the sequence parameter set (SPS), and when the value is true (“1”), CU unit Choose to use the information.
- the deblocking filter control information generation unit 131 selects to use information in CU units, based on the header information. For example, the deblocking filter control information generation unit 131 refers to transquant_bypass_enabled_flag of the picture parameter set (PPS), and when the value is true (“1”), selects to use information in CU units.
- PPS picture parameter set
- FIG. 8 An example of the syntax of the picture parameter set (PPS) is shown in FIG. 8 and FIG.
- transquant_bypass_enabled_flag shown in the 22nd line from the top of FIG. 8 is true (“1”)
- cu_transquant_bypass_flag exists for each CU. Therefore, in this case, the deblocking filter control information generation unit 131 selects the use of CU unit information in the deblocking filter process.
- the deblocking filter control information generation unit 131 selects to use the information in CU units, based on the header information.
- the control information generation unit for deblocking filter 131 refers to cu_qp_delta_enabled_flag of the picture parameter set (PPS), and when the value is true (“1”), selects to use information in CU units.
- the deblocking filter control information generation unit 131 selects the use of CU unit information in the deblocking filter process.
- the deblocking filter control information generation unit 131 when there are a plurality of slices in the current picture to be processed and there is a possibility that the quantization parameter may change for each slice, the deblocking filter control information generation unit 131 generates Choose to use the information. For example, the deblocking filter control information generation unit 131 compares slice_qp_delta of the slice header (slice_segment_header) with each other for slices, and selects the use of CU unit information if they are not identical to each other.
- FIG. 10 An example of the syntax of the slice header is shown in FIG. 10, FIG. 11 and FIG.
- slice_qp_delta shown in the 29th line from the top of FIG. 11 is not common among the slices, the deblocking filter control information generation unit 131 selects to use information in CU units in the deblocking filter process.
- the deblocking filter control information generation unit 131 selects not to use CU unit information in the deblocking filter process.
- the deblocking filter control information generation unit 131 supplies the loop filter 116 with the thus generated dbk_simple_flag.
- the SAO control information generation unit 132 refers to the header information such as SPS and PPS supplied from the lossless decoding unit 112 to determine the data unit of the information used for the SAO process. For example, when the condition for the value of the header information indicates that it is not necessary to refer to the information set for each CU, the SAO control information generator 132 refers to each CU unit to be referred to when performing the filtering process. Skip references to the information set in. In other words, for example, when the condition for the value of the header information indicates that the information set for each CU needs to be referred to, the SAO control information generation unit 132 refers to when performing the filtering process. The information set for each CU unit to be referred is referred to.
- the SAO control information generation unit 132 selects to use the information in CU units based on the header information. For example, the SAO control information generation unit 132 refers to pcm_loop_filter_disabled_flag (the third line from the top in FIG. 6) of the sequence parameter set (SPS), and when the value is true (“1”), the information in CU units is Choose to use.
- pcm_loop_filter_disabled_flag the third line from the top in FIG. 6
- SPS sequence parameter set
- the SAO control information generation unit 132 selects to use information in CU units, based on the header information. For example, the SAO control information generation unit 132 refers to transquant_bypass_enabled_flag (the 22nd line from the top in FIG. 8) of the picture parameter set (PPS), and when the value is true (“1”), the information in CU units is Choose to use.
- transquant_bypass_enabled_flag the 22nd line from the top in FIG. 8
- PPS picture parameter set
- the SAO control information generation unit 132 selects not to use the CU unit information in the SAO process.
- the SAO control information generation unit 132 supplies the generated sao_simple_flag to the loop filter 116.
- FIG. 13 is a block diagram showing a main configuration example of the loop filter 116. As shown in FIG. As shown in FIG. 13, the loop filter 116 includes a deblocking filter processing unit 141 and an SAO processing unit 142.
- the deblocking filter processing unit 141 performs deblocking filter processing on the reconstructed image supplied from the computing unit 115. At this time, the deblocking filter processing unit 141 acquires the deblocking filter control information dbk_simple_flag supplied from the filter control unit 122, and performs deblocking filter processing based on the value. That is, the deblocking filter processing unit 141 performs the deblocking filter process according to the information set for each data unit corresponding to the header information.
- the deblocking filter processing unit 141 performs deblocking filter processing using information in CU units. That is, when the deblocking filter processing unit 141 indicates that the condition for the value of the header information needs to refer to the information set for each CU, the deblocking filter processing unit 141 is set for each CU to be referred to when performing the filtering process. Deblocking filtering is performed with reference to the received information. For example, the deblocking filter processing unit 141 refers to cu_transquant_bypass_flag or pcm_flag of the CU and performs deblocking filter processing using the value.
- FIG. 14 An example of the syntax of CU is shown in FIG. 14 and FIG.
- cu_transquant_bypass_flag exists in the third line from above
- pcm_flag exists in the sixteenth line from above.
- the deblocking filter processing unit 141 performs deblocking filter processing using these values.
- the deblocking filter processing unit 141 performs deblocking filter processing without using information in CU units. That is, when the condition for the value of header information indicates that it is not necessary to refer to the information set for each CU, the deblocking filter processing unit 141 is set for each CU to be referred to when performing the filtering process. The deblocking filter processing is performed by skipping the reference to the stored information. The deblocking filter processing unit 141 supplies the reconstructed image subjected to the deblocking filter processing to the SAO processing unit 142.
- the SAO processing unit 142 performs SAO processing on the reconstructed image subjected to the deblocking filter processing supplied from the deblocking filter processing unit 141. At that time, the SAO processing unit 142 acquires SAO control information sao_simple_flag supplied from the filter control unit 122, and performs SAO processing based on the value. That is, the SAO processing unit 142 performs the SAO process according to the information set for each data unit corresponding to the header information.
- the SAO processing unit 142 performs the SAO process using the information in CU units. That is, when the SAO processing unit 142 indicates that the condition for the value of the header information needs to refer to the information set for each CU, the information set for each CU unit to be referred to when performing the filtering process Perform SAO processing with reference to. For example, the SAO processing unit 142 refers to cu_transquant_bypass_flag (the third line from the top in FIG. 14) and pcm_flag (the sixteenth line from the top in FIG. 14) of the CU and performs the SAO process using the values.
- cu_transquant_bypass_flag the third line from the top in FIG. 14
- pcm_flag the sixteenth line from the top in FIG. 14
- the SAO processing unit 142 performs the SAO process without using the information in units of CUs. That is, when the condition for the value of the header information indicates that it is not necessary to refer to the information set for each CU, the SAO processing unit 142 sets the information set for each CU to be referred to when performing the filtering process. Skip the reference to and perform SAO processing.
- the SAO processing unit 142 supplies the reconstructed image (that is, the decoded image) subjected to the SAO processing to the screen rearrangement buffer 117 and the frame memory 118.
- the image decoding apparatus 100 performs the loop filter process without referring to the information of the unnecessarily small data unit. As it can be performed, it is possible to suppress an increase in the load of decoding processing.
- step S101 the accumulation buffer 111 accumulates the transmitted bit stream.
- step S102 the lossless decoding unit 112 decodes the bit stream supplied from the accumulation buffer 111. That is, the I picture, P picture, and B picture encoded by the encoding side are decoded. At this time, various information other than the image information included in the bit stream such as header information is also decoded.
- step S103 the filter control unit 122 generates filter control information.
- step S104 the inverse quantization unit 113 inversely quantizes the quantized coefficient obtained by the process of step S102.
- step S105 the inverse orthogonal transformation unit 114 performs inverse orthogonal transformation on the orthogonal transformation coefficient obtained by the process of step S104. By this processing, residual data of the luminance component and prediction residual data of the chrominance component are restored.
- the intra prediction unit 119 or the inter prediction unit 120 performs prediction processing to generate a prediction image. That is, the prediction process is performed in the prediction mode applied at the time of encoding determined by the lossless decoding unit 112. More specifically, for example, when intra prediction is applied at the time of encoding, the intra prediction unit 119 generates a prediction image in the intra prediction mode which is determined to be optimal at the time of encoding. Also, for example, when inter prediction is applied at the time of encoding, the inter prediction unit 120 generates a prediction image in the inter prediction mode that is determined to be optimal at the time of encoding.
- step S107 the calculation unit 115 adds the predicted image generated in step S106 to the residual data restored by the process of step S105. This provides a reconstructed image.
- step S108 the loop filter 116 performs loop filter processing including deblocking filter processing, SAO processing, and the like on the reconstructed image obtained by the processing in step S107.
- step S109 the screen rearrangement buffer 117 rearranges the frames of the decoded image obtained by the process of step S108. That is, the order of the frames rearranged during encoding is rearranged to the original display order.
- the decoded image in which the frames are rearranged is output to the outside of the image decoding apparatus 100.
- step S110 the frame memory 118 stores the decoded image obtained by the process of step S108.
- step S110 ends, the decoding process ends.
- the deblocking filter control information generation unit 131 of the filter control unit 122 performs a deblocking filter control information generation process in step S121.
- step S122 the SAO control information generation unit 132 of the filter control unit 122 performs SAO control information generation processing.
- step S122 When the process of step S122 ends, the filter control information generation process ends, and the process returns to FIG.
- step S135 the deblocking filter control information generation unit 131 determines whether the number of slices of the current picture to be processed (the number of slice segments) is "1". When the picture is configured by a plurality of slices, the deblocking filter control information generation unit 131 refers to the information set for each CU unit to be referred to when performing the filter process. Therefore, when it is determined that the number of slice segments is more than one, the process proceeds to step S136.
- the processing proceeds to step S137.
- the deblocking filter control information generation unit 131 refers to each CU unit to be referred to when performing the filter process. Skip references to the information set in.
- step S139 the deblocking filter control information generation unit 131 determines whether the current slice is the last slice (slice segment) belonging to the current picture. If it is determined that the process is not the last, the process returns to step S136 to repeat the subsequent processes.
- step S139 If it is determined in step S139 that the current slice is the last slice (slice segment) belonging to the current picture, the process proceeds to step S140.
- step S135 When it is determined in step S135 that the number of slices of the current picture (the number of slice segments) is "1", the processing in steps S136 to S139 is omitted, and the process proceeds to step S140. That is, when the picture is configured by one slice, the deblocking filter control information generation unit 131 skips the reference to the information set for each CU to be referred to when performing the filter processing.
- step S140 the deblocking filter control information generation unit 131 generates the deblocking filter control information dbk_simple_flag, and sets the value to “1”.
- step S140 ends, the process returns to FIG.
- step S138 If it is determined in step S138 that slice_qp_delta is not first_slice_qp_delta, that is, it is determined that the quantization parameter of the current slice does not match the quantization parameter of the first slice of the current picture, the process proceeds to step S141.
- step S141 the deblocking filter control information generation unit 131 generates deblocking filter control information dbk_simple_flag, and sets the value to “0”.
- step S141 When the process of step S141 ends, the process returns to FIG.
- step S153 the SAO control information generation unit 132 generates the SAO control information sao_simple_flag, and sets the value to “1”.
- the control information generation process for SAO ends, and the process returns to FIG.
- step S154 the SAO control information generation unit 132 generates the SAO control information sao_simple_flag, and sets the value to “0”.
- the control information generation process for SAO ends, and the process returns to FIG.
- the deblocking filter processing unit 141 of the loop filter 116 performs deblocking filter processing in step S161.
- step S162 the SAO processing unit 142 of the loop filter 116 performs SAO processing.
- step S162 ends, the loop filter process ends, and the process returns to FIG.
- step S172 the deblocking filter processing unit 141 performs deblocking filter processing in units of CTBs that do not use information in units of CUs.
- the deblocking filter process ends, and the process returns to FIG.
- step S173 the deblocking filter processing unit 141 performs CU-based deblocking filter processing using information in CU units.
- the deblocking filter process ends, and the process returns to FIG.
- the deblocking filter processing unit 141 calculates boundary strength for an edge (edge) in a picture in step S181.
- step S183 the deblocking filter processing unit 141 acquires information of the i-th edge.
- step S184 the deblocking filter processing unit 141 determines whether to apply a deblocking filter to the current edge to be processed. If it is determined that the deblocking filter is to be applied, the process proceeds to step S185.
- step S185 the deblocking filter processing unit 141 obtains the information of the CU to which the pixel adjacent to the current edge belongs.
- step S186 the deblocking filter processing unit 141 calculates qP L from the quantization parameter Qp Y of the CU, and derives ⁇ and tc, which are parameters for the deblocking filter.
- step S187 the deblocking filter processing unit 141 applies a deblocking filter to the current edge.
- step S188 When the process of step S188 ends, the process proceeds to step S189. If it is determined in step S184 that the deblocking filter is not to be applied, the process proceeds to step S189.
- step S189 the deblocking filter processing unit 141 determines whether the current edge is the last edge of the current picture. If it is determined that the current edge is not the last edge of the current picture, the process proceeds to step S190.
- step S190 ends, the process returns to step S183, and the subsequent processes are repeated.
- step S189 If it is determined in step S189 that the current edge is the last edge of the current picture, the CU-based deblocking filter process ends, and the process returns to FIG.
- the deblocking filter processing using information in units of CUs must refer to each CU, and the processing load is large. If deblocking filtering is performed without confirming header information, deblocking filtering in units of CUs must be performed. Therefore, even if the information in units of CUs is not necessary, the information in units of CUs must be referred to, which may increase the load of the deblocking filter processing unnecessarily.
- the deblocking filter processing unit 141 calculates boundary strength for an edge in a picture in step S201.
- step S202 the deblocking filter processing unit 141 derives ⁇ and tc common to the pictures.
- step S204 the deblocking filter processing unit 141 acquires information of the i-th edge.
- step S205 the deblocking filter processing unit 141 determines whether to apply a deblocking filter. If it is determined that the deblocking filter is to be applied, the process proceeds to step S206.
- step S206 the deblocking filter processing unit 141 applies a deblocking filter to the current edge.
- the process of step S206 ends, the process proceeds to step S207. If it is determined in step S205 that the deblocking filter process is not to be performed, the process of step S206 is omitted, and the process proceeds to step S207.
- step S207 the deblocking filter processing unit 141 determines whether the current edge is the last edge of the current picture. If it is determined that the current edge is not the last edge of the current picture, the process proceeds to step S208.
- the process of step S208 ends the process returns to step S204, and the subsequent processes are repeated.
- step S207 If it is determined in step S207 that the current edge is the last edge of the current picture, the CU-based deblocking filter process ends, and the process returns to FIG.
- the deblocking filter process using information in CTB units can perform the deblocking filter process without referring to each CU, and can suppress an increase in processing load. That is, as described above, the deblocking filter processing unit 141 refers to the header information to confirm that the information in CU units is unnecessary, and the deblocking filter processing in CU units is performed according to the necessity / unnecessity. Properly use deblocking filtering in CTB units. By doing this, the deblocking filter processing unit 141 can suppress an unnecessary increase in the load of the deblocking filter processing.
- step S212 the SAO processing unit 142 performs SAO processing in units of CTB that does not use information in units of CU.
- the deblocking filter process ends, and the process returns to FIG.
- step S213 the deblocking filter processing unit 141 performs SAO processing in units of CUs using information in units of CUs.
- the SAO process ends, and the process returns to FIG.
- step S222 the SAO processing unit 142 acquires information of the i-th CTB.
- step S225 the SAO processing unit 142 acquires information of the j-th CU.
- step S227 the SAO processing unit 142 adds an offset for the CU.
- step S228 the SAO processing unit 142 determines whether the current CU is the last CU of the current CTB to be processed. If it is determined that it is not the last CU, the process proceeds to step S229.
- step S229 ends the process returns to step S225 and repeats the subsequent processes. That is, a series of processes from step S225 to step S228 are performed for all CUs in the current CTB.
- step S230 the SAO processing unit 142 determines whether it is the last CTB of the current picture. If it is determined that the CTB is not the last one, the process proceeds to step S231.
- step S231 the process returns to step S235, and the subsequent processes are repeated.
- step S230 If it is determined in step S230 that the CTB is the last one, the CU unit SAO process ends, and the process returns to FIG.
- the SAO process using information in units of CUs must refer to each CU, and the processing load is large.
- this CU unit of SAO processing must be performed. Therefore, even if the information in units of CUs is unnecessary, the information in units of CUs must be referred to, which may increase the load of the SAO process unnecessarily.
- step S242 the SAO processing unit 142 acquires information of the i-th CTB.
- step S244 the SAO processing unit 142 calculates SaoOffsetVal.
- step S245 the SAO processing unit 142 adds an offset to the CTB.
- step S245 the process proceeds to step S246.
- step S243 the processing proceeds to step S246.
- step S246 the SAO processing unit 142 determines whether it is the last CTB of the current picture. If it is determined that the CTB is not the last one, the process proceeds to step S247.
- step S247 ends the process returns to step S242 and repeats the subsequent processes.
- step S246 If it is determined in step S246 that the CTB is the last one, the CTB-based SAO process ends, and the process returns to FIG.
- the SAO process can be performed without referring to each CU, and an increase in processing load can be suppressed. That is, as described above, the SAO processing unit 142 refers to the header information to confirm that the information in CU units is unnecessary, and the SAO processing in CU units and the SAO in CTB units according to the necessity / unnecessity. Use the process appropriately. By doing this, the SAO processing unit 142 can suppress an unnecessary increase in the load of the SAO processing.
- the load on deblocking filter processing is reduced when it can be performed in CTB units. can do.
- the image decoding apparatus 100 does not have to refer to information of an unnecessarily small unit at the time of the filtering process, so that an increase in the processing load can be suppressed. it can.
- the application scope of the present technology can be applied to any image decoding apparatus capable of decoding encoded data obtained by encoding image data and performing filtering processing at the time of decoding.
- the present technology is, for example, MPEG, H.
- image information bit stream
- orthogonal transformation such as discrete cosine transformation and motion compensation as in 26x etc. via satellite broadcasting, cable television, the Internet, or network media such as a cellular phone
- the present technology can be applied to an image decoding apparatus used in processing on storage media such as an optical disk, a magnetic disk, and a flash memory.
- FIG. 27 shows an example of a multi-viewpoint image coding method.
- the multi-viewpoint image includes images of a plurality of viewpoints (views).
- the multiple views of this multi-view image are encoded using the base view that performs encoding / decoding using only the image of its own view without using information of other views, and the information of other views. It consists of a non-base view that performs decoding.
- Non-base view encoding / decoding may use base view information or may use other non-base view information.
- the multi-viewpoint image is encoded for each viewpoint. And when decoding the coding data obtained by doing so, the coding data of each viewpoint are each decoded (that is, for every viewpoint).
- the method described above in the first embodiment may be applied to such decoding of each viewpoint. By doing this, it is possible to suppress an increase in the load of decoding processing for the images of the respective viewpoints. That is, also in the case of a multi-viewpoint image, it is possible to suppress an increase in the load of decoding processing.
- FIG. 28 is a diagram showing a multi-viewpoint image coding apparatus which performs the above-described multi-viewpoint image coding.
- the multi-viewpoint image coding device 600 includes a coding unit 601, a coding unit 602, and a multiplexing unit 603.
- the encoding unit 601 encodes a base view image to generate a base view image coded stream.
- the encoding unit 602 encodes the non-base view image to generate a non-base view image coded stream.
- the multiplexing unit 603 multiplexes the base view image coded stream generated by the coding unit 601 and the non-base view image coded stream generated by the coding unit 602 to generate a multi-view image coded stream. Do.
- FIG. 29 is a diagram illustrating a multi-viewpoint image decoding apparatus that performs the above-described multi-viewpoint image decoding.
- the multi-viewpoint image decoding device 610 includes a demultiplexing unit 611, a decoding unit 612, and a decoding unit 613.
- a demultiplexing unit 611 demultiplexes a multi-view image coded stream in which the base view image coded stream and the non-base view image coded stream are multiplexed, and the base view image coded stream and the non-base view image. Extract the coded stream.
- the decoding unit 612 decodes the base view image coded stream extracted by the demultiplexing unit 611 to obtain a base view image.
- the decoding unit 613 decodes the non-base view image coded stream extracted by the demultiplexing unit 611 to obtain a non-base view image.
- the image decoding apparatus 100 described above may be applied as the decoding unit 612 and the decoding unit 613 of such a multi-viewpoint image decoding apparatus 610.
- the method described in the first embodiment can be applied to decoding of encoded data of a multi-viewpoint image as well. That is, the multi-viewpoint image decoding device 610 can suppress an increase in load of decoding processing of encoded data of the multi-viewpoint image.
- FIG. 30 shows an example of the hierarchical image coding method.
- Hierarchical image coding (scalable coding) is to image data into a plurality of layers (layering) so as to have a scalability (scalability) function with respect to predetermined parameters, and to code each layer.
- hierarchical image decoding hierarchical image coding (scalable decoding) is decoding corresponding to the hierarchical image coding.
- the hierarchized image includes images of a plurality of hierarchies (layers) having different values of the predetermined parameter.
- a plurality of layers of this hierarchical image are encoded using a base layer that performs encoding / decoding using only an image of its own layer without using an image of another layer, and an image of another layer It consists of a non-base layer (also referred to as an enhancement layer) that performs decoding.
- the non-base layer may use an image of the base layer, or may use an image of another non-base layer.
- the non-base layer is configured by data (difference data) of a difference image between its own image and an image of another layer so that redundancy is reduced.
- difference data difference data
- a base layer and a non-base layer also referred to as an enhancement layer
- an image of lower quality than the original image can be obtained only with the data of the base layer.
- an original image that is, a high quality image
- images of various qualities can be easily obtained depending on the situation.
- image compression information of only a base layer is transmitted, and a moving image with low space-time resolution or poor image quality is reproduced
- image compression information of the enhancement layer is transmitted in addition to the base layer, and the space-time resolution is high, or It is possible to transmit image compression information according to the capabilities of the terminal or the network from the server without performing transcoding processing, such as reproducing high-quality moving images.
- the hierarchical image is encoded layer by layer. And when decoding the coding data obtained by doing so, the coding data of each layer are each decoded (namely, layer by layer).
- the method described above in the first embodiment may be applied to such decoding of each layer. By doing this, it is possible to suppress an increase in the load of the decoding process for the image of each layer. That is, also in the case of hierarchical images, an increase in the load of decoding processing can be suppressed.
- FIG. 31 is a diagram showing a hierarchical image coding apparatus which performs the above-mentioned hierarchical image coding.
- the layered image coding device 620 includes a coding unit 621, a coding unit 622, and a multiplexing unit 623.
- the encoding unit 621 encodes a base layer image to generate a base layer image coded stream.
- the encoding unit 622 encodes the non-base layer image to generate a non-base layer image coded stream.
- the multiplexing unit 623 multiplexes the base layer image coded stream generated by the coding unit 621 and the non-base layer image coded stream generated by the coding unit 622 to generate a hierarchical image coded stream. .
- FIG. 32 is a diagram showing a hierarchical image decoding apparatus that performs the hierarchical image decoding described above.
- the hierarchical image decoding device 630 includes a demultiplexing unit 631, a decoding unit 632, and a decoding unit 633.
- a demultiplexing unit 631 demultiplexes the hierarchical image coded stream in which the base layer image coded stream and the non-base layer image coded stream are multiplexed, and the base layer image coded stream and the non-base layer image code Extract the stream of
- the decoding unit 632 decodes the base layer image coded stream extracted by the demultiplexing unit 631 to obtain a base layer image.
- the decoding unit 633 decodes the non-base layer image coded stream extracted by the demultiplexing unit 631 to obtain a non-base layer image.
- the image decoding apparatus 100 described above may be applied as the decoding unit 632 and the decoding unit 633 of such a hierarchical image decoding apparatus 630.
- the method described in the first embodiment can be applied to decoding of encoded data of hierarchical images. That is, the hierarchical image decoding device 630 can correctly decode the encoded data of the hierarchical image encoded by the various methods described in the above embodiments. Therefore, the hierarchical image decoding device 630 can suppress an increase in load of decoding processing of encoded data of the hierarchical image.
- Fourth embodiment> ⁇ Computer>
- the series of processes described above can be performed by hardware or software.
- a program that configures the software is installed on a computer.
- the computer includes, for example, a general-purpose personal computer that can execute various functions by installing a computer incorporated in dedicated hardware and various programs.
- FIG. 33 is a block diagram showing an example of a hardware configuration of a computer that executes the series of processes described above according to a program.
- a central processing unit (CPU) 801, a read only memory (ROM) 802, and a random access memory (RAM) 803 are mutually connected via a bus 804.
- An input / output interface 810 Also connected to the bus 804 is an input / output interface 810.
- An input unit 811, an output unit 812, a storage unit 813, a communication unit 814, and a drive 815 are connected to the input / output interface 810.
- the input unit 811 includes, for example, a keyboard, a mouse, a microphone, a touch panel, an input terminal, and the like.
- the output unit 812 includes, for example, a display, a speaker, and an output terminal.
- the storage unit 813 includes, for example, a hard disk, a RAM disk, and a non-volatile memory.
- the communication unit 814 is, for example, a network interface.
- the drive 815 drives removable media 821 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 801 loads the program stored in the storage unit 813 into the RAM 803 via the input / output interface 810 and the bus 804 and executes the program. Processing is performed.
- the RAM 803 also stores data necessary for the CPU 801 to execute various processes.
- the program executed by the computer (CPU 801) can be recorded and applied to, for example, a removable medium 821 as a package medium or the like.
- the program can be installed in the storage unit 813 via the input / output interface 810 by attaching the removable media 821 to the drive 815.
- the program can also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting. In that case, the program can be received by the communication unit 814 and installed in the storage unit 813.
- a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be received by the communication unit 814 and installed in the storage unit 813.
- this program can be installed in advance in the ROM 802 or the storage unit 813.
- the program executed by the computer may be a program that performs processing in chronological order according to the order described in this specification, in parallel, or when necessary, such as when a call is made. It may be a program to be processed.
- the step of describing the program to be recorded on the recording medium is not limited to processing performed chronologically in the order described, but not necessarily parallel processing It also includes processing to be executed individually.
- a system means a set of a plurality of components (apparatus, modules (parts), etc.), and it does not matter whether all the components are in the same case. Therefore, a plurality of devices housed in separate housings and connected via a network, and one device housing a plurality of modules in one housing are all systems. .
- the configuration described above as one device (or processing unit) may be divided and configured as a plurality of devices (or processing units). Conversely, the configuration described as a plurality of devices (or processing units) in the above may be collectively configured as one device (or processing unit). Further, it goes without saying that configurations other than those described above may be added to the configuration of each device (or each processing unit). Furthermore, part of the configuration of one device (or processing unit) may be included in the configuration of another device (or other processing unit) if the configuration or operation of the entire system is substantially the same. .
- the present technology can have a cloud computing configuration in which one function is shared and processed by a plurality of devices via a network.
- each step described in the above-described flowchart can be executed by one device or in a shared manner by a plurality of devices.
- the plurality of processes included in one step can be executed by being shared by a plurality of devices in addition to being executed by one device.
- the image decoding apparatus includes, for example, a transmitter or a receiver in optical satellite broadcasting, cable broadcasting such as cable TV, distribution on the Internet, and distribution to terminals by cellular communication, an optical disk, a magnetic disk,
- the present invention can be applied to various electronic devices such as a recording device which records an image on a medium such as a flash memory or a reproducing device which reproduces an image from the storage medium.
- a recording device which records an image on a medium such as a flash memory
- reproducing device which reproduces an image from the storage medium.
- FIG. 34 shows an example of a schematic configuration of a television set to which the embodiment described above is applied.
- the television device 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, an external interface (I / F) unit 909, and a control unit.
- a user interface (I / F) unit 911 and a bus 912 are provided.
- the tuner 902 extracts a signal of a desired channel from a broadcast signal received via the antenna 901, and demodulates the extracted signal. Then, the tuner 902 outputs the coded bit stream obtained by demodulation to the demultiplexer 903. That is, the tuner 902 has a role as a transmission unit in the television apparatus 900 which receives a coded stream in which an image is coded.
- the demultiplexer 903 separates the video stream and audio stream of the program to be viewed from the coded bit stream, and outputs the separated streams to the decoder 904. Also, the demultiplexer 903 extracts auxiliary data such as an EPG (Electronic Program Guide) from the encoded bit stream, and supplies the extracted data to the control unit 910. When the coded bit stream is scrambled, the demultiplexer 903 may perform descrambling.
- EPG Electronic Program Guide
- the decoder 904 decodes the video stream and audio stream input from the demultiplexer 903. Then, the decoder 904 outputs the video data generated by the decoding process to the video signal processing unit 905. Further, the decoder 904 outputs the audio data generated by the decoding process to the audio signal processing unit 907.
- the video signal processing unit 905 reproduces the video data input from the decoder 904 and causes the display unit 906 to display a video. Also, the video signal processing unit 905 may cause the display unit 906 to display an application screen supplied via the network. Further, the video signal processing unit 905 may perform additional processing such as noise removal on the video data according to the setting. Furthermore, the video signal processing unit 905 may generate an image of a graphical user interface (GUI) such as a menu, a button, or a cursor, for example, and may superimpose the generated image on the output image.
- GUI graphical user interface
- the display unit 906 is driven by a drive signal supplied from the video signal processing unit 905, and displays an image on the image surface of a display device (for example, a liquid crystal display, a plasma display, or OELD (Organic ElectroLuminescence Display) (organic EL display)). Or display an image.
- a display device for example, a liquid crystal display, a plasma display, or OELD (Organic ElectroLuminescence Display) (organic EL display)). Or display an image.
- the audio signal processing unit 907 performs reproduction processing such as D / A conversion and amplification on audio data input from the decoder 904, and causes the speaker 908 to output audio. Further, the audio signal processing unit 907 may perform additional processing such as noise removal on the audio data.
- the external interface unit 909 is an interface for connecting the television device 900 to an external device or a network.
- a video stream or an audio stream received via the external interface unit 909 may be decoded by the decoder 904. That is, the external interface unit 909 also has a role as a transmission unit in the television apparatus 900 that receives the encoded stream in which the image is encoded.
- the control unit 910 includes a processor such as a CPU, and memories such as a RAM and a ROM.
- the memory stores a program executed by the CPU, program data, EPG data, data acquired via a network, and the like.
- the program stored by the memory is read and executed by the CPU, for example, when the television device 900 is started.
- the CPU controls the operation of the television apparatus 900 according to an operation signal input from, for example, the user interface unit 911 by executing a program.
- the user interface unit 911 is connected to the control unit 910.
- the user interface unit 911 has, for example, buttons and switches for the user to operate the television device 900, and a receiver for remote control signals.
- the user interface unit 911 detects an operation by the user via these components, generates an operation signal, and outputs the generated operation signal to the control unit 910.
- the bus 912 mutually connects the tuner 902, the demultiplexer 903, the decoder 904, the video signal processing unit 905, the audio signal processing unit 907, the external interface unit 909, and the control unit 910.
- the decoder 904 may have the function of the image decoding device 100. That is, the decoder 904 may decode the encoded data by the method described in the first embodiment. By doing so, the television apparatus 900 can suppress an increase in the load of decoding processing of the received encoded bit stream.
- FIG. 35 shows an example of a schematic configuration of a mobile phone to which the embodiment described above is applied.
- the mobile phone 920 includes an antenna 921, a communication unit 922, an audio codec 923, a speaker 924, a microphone 925, a camera unit 926, an image processing unit 927, a multiplexing and separating unit 928, a recording and reproducing unit 929, a display unit 930, a control unit 931, an operation.
- a unit 932 and a bus 933 are provided.
- the antenna 921 is connected to the communication unit 922.
- the speaker 924 and the microphone 925 are connected to the audio codec 923.
- the operation unit 932 is connected to the control unit 931.
- the bus 933 mutually connects the communication unit 922, the audio codec 923, the camera unit 926, the image processing unit 927, the demultiplexing unit 928, the recording / reproducing unit 929, the display unit 930, and the control unit 931.
- the cellular phone 920 can transmit and receive audio signals, transmit and receive electronic mail or image data, capture an image, and record data in various operation modes including a voice call mode, a data communication mode, a shooting mode, and a videophone mode. Do the action.
- the analog voice signal generated by the microphone 925 is supplied to the voice codec 923.
- the audio codec 923 converts an analog audio signal into audio data, and A / D converts and compresses the converted audio data. Then, the audio codec 923 outputs the compressed audio data to the communication unit 922.
- the communication unit 922 encodes and modulates audio data to generate a transmission signal. Then, the communication unit 922 transmits the generated transmission signal to a base station (not shown) via the antenna 921.
- the communication unit 922 also amplifies and frequency-converts a radio signal received via the antenna 921 to obtain a reception signal.
- the communication unit 922 demodulates and decodes the received signal to generate audio data, and outputs the generated audio data to the audio codec 923.
- the audio codec 923 decompresses and D / A converts audio data to generate an analog audio signal. Then, the audio codec 923 supplies the generated audio signal to the speaker 924 to output audio.
- the control unit 931 generates character data constituting an electronic mail in accordance with an operation by the user via the operation unit 932. Further, the control unit 931 causes the display unit 930 to display characters. Further, the control unit 931 generates electronic mail data in response to a transmission instruction from the user via the operation unit 932, and outputs the generated electronic mail data to the communication unit 922.
- a communication unit 922 encodes and modulates electronic mail data to generate a transmission signal. Then, the communication unit 922 transmits the generated transmission signal to a base station (not shown) via the antenna 921. The communication unit 922 also amplifies and frequency-converts a radio signal received via the antenna 921 to obtain a reception signal.
- the communication unit 922 demodulates and decodes the received signal to restore the e-mail data, and outputs the restored e-mail data to the control unit 931.
- the control unit 931 causes the display unit 930 to display the contents of the e-mail, and also supplies the e-mail data to the recording and reproduction unit 929 to write the data on the storage medium.
- the recording and reproducing unit 929 includes an arbitrary readable and writable storage medium.
- the storage medium may be a built-in storage medium such as RAM or flash memory, and may be an externally mounted type such as hard disk, magnetic disk, magneto-optical disk, optical disk, USB (Universal Serial Bus) memory, or memory card Storage media.
- the camera unit 926 captures an image of a subject to generate image data, and outputs the generated image data to the image processing unit 927.
- the image processing unit 927 encodes the image data input from the camera unit 926, supplies the encoded stream to the recording and reproduction unit 929, and causes the recording medium to write the encoded stream.
- the recording / reproducing unit 929 reads out the encoded stream recorded in the storage medium and outputs the read encoded stream to the image processing unit 927.
- the image processing unit 927 decodes the encoded stream input from the recording / reproducing unit 929, supplies the image data to the display unit 930, and displays the image.
- the demultiplexing unit 928 multiplexes the video stream encoded by the image processing unit 927 and the audio stream input from the audio codec 923, and the communication unit 922 multiplexes the multiplexed stream.
- Output to The communication unit 922 encodes and modulates the stream to generate a transmission signal.
- the communication unit 922 transmits the generated transmission signal to a base station (not shown) via the antenna 921.
- the communication unit 922 also amplifies and frequency-converts a radio signal received via the antenna 921 to obtain a reception signal.
- the transmission signal and the reception signal may include a coded bit stream.
- the communication unit 922 demodulates and decodes the received signal to restore the stream, and outputs the restored stream to the demultiplexing unit 928.
- the demultiplexing unit 928 separates the video stream and the audio stream from the input stream, and outputs the video stream to the image processing unit 927 and the audio stream to the audio codec 923.
- the image processing unit 927 decodes the video stream to generate video data.
- the video data is supplied to the display unit 930, and the display unit 930 displays a series of images.
- the audio codec 923 decompresses and D / A converts the audio stream to generate an analog audio signal. Then, the audio codec 923 supplies the generated audio signal to the speaker 924 to output audio.
- the image processing unit 927 may have the function of the image decoding apparatus 100. That is, the image processing unit 927 may decode the encoded data by the method described in the first embodiment. By doing this, the mobile phone 920 can suppress an increase in the load of decoding processing of the encoded stream (video stream).
- FIG. 36 shows an example of a schematic configuration of a recording and reproducing apparatus to which the embodiment described above is applied.
- the recording / reproducing device 940 encodes, for example, audio data and video data of the received broadcast program, and records the encoded data on a recording medium.
- the recording and reproduction device 940 may encode, for example, audio data and video data acquired from another device and record the encoded data on a recording medium.
- the recording / reproducing device 940 reproduces the data recorded on the recording medium on the monitor and the speaker, for example, in accordance with the user's instruction. At this time, the recording / reproducing device 940 decodes the audio data and the video data.
- the recording / reproducing apparatus 940 includes a tuner 941, an external interface (I / F) unit 942, an encoder 943, an HDD (Hard Disk Drive) 944, a disk drive 945, a selector 946, a decoder 947, an OSD (On-Screen Display) 948, and control.
- the tuner 941 extracts a signal of a desired channel from a broadcast signal received via an antenna (not shown) and demodulates the extracted signal. Then, the tuner 941 outputs the coded bit stream obtained by demodulation to the selector 946. That is, the tuner 941 has a role as a transmission unit in the recording / reproducing apparatus 940.
- the external interface unit 942 is an interface for connecting the recording and reproducing device 940 to an external device or a network.
- the external interface unit 942 may be, for example, an IEEE (Institute of Electrical and Electronic Engineers) 1394 interface, a network interface, a USB interface, a flash memory interface, or the like.
- video data and audio data received via the external interface unit 942 are input to the encoder 943. That is, the external interface unit 942 has a role as a transmission unit in the recording / reproducing device 940.
- the encoder 943 encodes video data and audio data when the video data and audio data input from the external interface unit 942 are not encoded. Then, the encoder 943 outputs the coded bit stream to the selector 946.
- the HDD 944 records an encoded bit stream obtained by compressing content data such as video and audio, various programs, and other data in an internal hard disk. Also, the HDD 944 reads these data from the hard disk when playing back video and audio.
- the disk drive 945 records and reads data on the mounted recording medium.
- the recording medium mounted on the disk drive 945 is, for example, a DVD (Digital Versatile Disc) disk (DVD-Video, DVD-RAM (DVD-Random Access Memory), DVD-R (DVD-Recordable), DVD-RW (DVD- Rewritable, DVD + R (DVD + Recordable), DVD + RW (DVD + Rewritable), etc., Blu-ray (registered trademark) disc, etc. may be used.
- DVD Digital Versatile Disc
- DVD-Video DVD-Video
- DVD-RAM DVD-Random Access Memory
- DVD-R DVD-Recordable
- DVD-RW DVD- Rewritable
- DVD + R DVD + Recordable
- DVD + RW DVD + Rewritable
- Blu-ray registered trademark
- the selector 946 selects the coded bit stream input from the tuner 941 or the encoder 943 at the time of video and audio recording, and outputs the selected coded bit stream to the HDD 944 or the disk drive 945. Also, the selector 946 outputs the encoded bit stream input from the HDD 944 or the disk drive 945 to the decoder 947 at the time of reproduction of video and audio.
- the decoder 947 decodes the coded bit stream to generate video data and audio data. Then, the decoder 947 outputs the generated video data to the OSD 948. Further, the decoder 947 outputs the generated audio data to an external speaker.
- the OSD 948 reproduces the video data input from the decoder 947 and displays the video.
- the OSD 948 may superimpose an image of a GUI such as a menu, a button, or a cursor on the video to be displayed.
- the control unit 949 includes a processor such as a CPU, and memories such as a RAM and a ROM.
- the memory stores programs executed by the CPU, program data, and the like.
- the program stored by the memory is read and executed by the CPU, for example, when the recording and reproducing device 940 is started.
- the CPU controls the operation of the recording / reproducing apparatus 940 in accordance with an operation signal input from, for example, the user interface unit 950 by executing a program.
- the user interface unit 950 is connected to the control unit 949.
- the user interface unit 950 includes, for example, a button and a switch for the user to operate the recording and reproducing device 940, a receiver of a remote control signal, and the like.
- the user interface unit 950 detects an operation by the user via these components, generates an operation signal, and outputs the generated operation signal to the control unit 949.
- the decoder 947 may have the function of the image decoding apparatus 100. That is, the decoder 947 may decode the encoded data by the method described in the first embodiment. By doing this, the recording / reproducing device 940 can suppress an increase in the load of decoding processing of the coded bit stream.
- FIG. 37 shows an example of a schematic configuration of an imaging device to which the embodiment described above is applied.
- the imaging device 960 captures an object to generate an image, encodes image data, and records the image data in a recording medium.
- the imaging device 960 includes an optical block 961, an imaging unit 962, a signal processing unit 963, an image processing unit 964, a display unit 965, an external interface (I / F) unit 966, a memory unit 967, a media drive 968, an OSD 969, and a control unit 970. , A user interface (I / F) unit 971, and a bus 972.
- the optical block 961 is connected to the imaging unit 962.
- the imaging unit 962 is connected to the signal processing unit 963.
- the display unit 965 is connected to the image processing unit 964.
- the user interface unit 971 is connected to the control unit 970.
- the bus 972 mutually connects the image processing unit 964, the external interface unit 966, the memory unit 967, the media drive 968, the OSD 969, and the control unit 970.
- the optical block 961 has a focus lens, an aperture mechanism, and the like.
- the optical block 961 forms an optical image of a subject on the imaging surface of the imaging unit 962.
- the imaging unit 962 includes an image sensor such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and converts an optical image formed on an imaging surface into an image signal as an electrical signal by photoelectric conversion. Then, the imaging unit 962 outputs the image signal to the signal processing unit 963.
- CCD charge coupled device
- CMOS complementary metal oxide semiconductor
- the signal processing unit 963 performs various camera signal processing such as knee correction, gamma correction, and color correction on the image signal input from the imaging unit 962.
- the signal processing unit 963 outputs the image data after camera signal processing to the image processing unit 964.
- the image processing unit 964 encodes the image data input from the signal processing unit 963 to generate encoded data. Then, the image processing unit 964 outputs the generated encoded data to the external interface unit 966 or the media drive 968. Also, the image processing unit 964 decodes the encoded data input from the external interface unit 966 or the media drive 968 to generate image data. Then, the image processing unit 964 outputs the generated image data to the display unit 965.
- the image processing unit 964 may output the image data input from the signal processing unit 963 to the display unit 965 to display an image. The image processing unit 964 may superimpose the display data acquired from the OSD 969 on the image to be output to the display unit 965.
- the OSD 969 generates an image of a GUI such as a menu, a button, or a cursor, for example, and outputs the generated image to the image processing unit 964.
- a GUI such as a menu, a button, or a cursor
- the external interface unit 966 is configured as, for example, a USB input / output terminal.
- the external interface unit 966 connects the imaging device 960 and the printer, for example, when printing an image.
- a drive is connected to the external interface unit 966 as necessary.
- removable media such as a magnetic disk or an optical disk may be attached to the drive, and a program read from the removable media may be installed in the imaging device 960.
- the external interface unit 966 may be configured as a network interface connected to a network such as a LAN or the Internet. That is, the external interface unit 966 has a role as a transmission unit in the imaging device 960.
- the recording medium mounted in the media drive 968 may be, for example, any readable / writable removable medium such as a magnetic disk, a magneto-optical disk, an optical disk, or a semiconductor memory.
- the recording medium may be fixedly attached to the media drive 968, and a non-portable storage unit such as, for example, a built-in hard disk drive or a solid state drive (SSD) may be configured.
- SSD solid state drive
- the control unit 970 includes a processor such as a CPU, and memories such as a RAM and a ROM.
- the memory stores programs executed by the CPU, program data, and the like.
- the program stored by the memory is read and executed by the CPU, for example, when the imaging device 960 starts up.
- the CPU controls the operation of the imaging device 960 according to an operation signal input from, for example, the user interface unit 971 by executing a program.
- the user interface unit 971 is connected to the control unit 970.
- the user interface unit 971 includes, for example, buttons and switches for the user to operate the imaging device 960.
- the user interface unit 971 detects an operation by the user via these components, generates an operation signal, and outputs the generated operation signal to the control unit 970.
- the image processing unit 964 may have the function of the image decoding device 100. That is, the image processing unit 964 may decode the encoded data by the method described in the first embodiment. By doing this, the imaging device 960 can suppress an increase in the load of decoding processing of encoded data.
- the present technology is also applicable to HTTP streaming, such as MPEG DASH, which selects and uses an appropriate one of a plurality of pieces of encoded data having different resolutions and the like prepared in advance in units of segments. Can. That is, information on encoding and decoding can also be shared among such multiple pieces of encoded data.
- FIG. 38 illustrates an example of a schematic configuration of a video set to which the present technology is applied.
- the video set 1300 shown in FIG. 38 is such a multi-functionalized configuration, and the device having a function related to image encoding and / or decoding may be included in the function. It is a combination of devices with other related functions.
- a video set 1300 includes modules such as a video module 1311, an external memory 1312, a power management module 1313, and a front end module 1314, and related modules such as connectivity 1321, a camera 1322 and a sensor 1323. And a device having a function.
- a module is a component that combines several component functions that are related to one another into components with a cohesive function.
- the specific physical configuration is arbitrary, for example, it is conceivable that a plurality of processors having respective functions, electronic circuit elements such as resistors and capacitors, and other devices are disposed and integrated on a wiring board or the like. . It is also conceivable to combine a module with another module or processor to make a new module.
- the video module 1311 is a combination of the configuration having the function related to image processing, and includes an application processor, a video processor, a broadband modem 1333 and an RF module 1334.
- the processor is one in which a configuration having a predetermined function is integrated on a semiconductor chip by SoC (System On a Chip), and there is also one called 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, etc., and a program (software configuration) to be executed using them. And both may be combined.
- a program has a logic circuit and a CPU, a ROM, a RAM, etc., a part of the function is realized by a logic circuit (hardware configuration), and another program is executed on the CPU (software configuration) It may be realized by
- the application processor 1331 in FIG. 38 is a processor that executes an application related to image processing.
- the application executed in the application processor 1331 can not only perform arithmetic processing in order to realize a predetermined function, but can also control the configuration inside and outside 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 and / or decoding.
- the broadband modem 1333 generates analog signals by digitally modulating data (digital signals) to be transmitted by wired or wireless (or both) broadband communications performed via broadband links such as the Internet and public telephone networks. It converts or demodulates an analog signal received by the broadband communication to convert it into data (digital signal).
- the broadband modem 1333 processes arbitrary information such as, for example, image data processed by the video processor 1332, a stream encoded with 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 Frequency) signal transmitted / received via an antenna. For example, the RF module 1334 performs frequency conversion and the like on the baseband signal generated by the broadband modem 1333 to generate an RF signal. Also, for example, the RF module 1334 performs frequency conversion or the like on the RF signal received via the front end module 1314 to generate a baseband signal.
- RF Radio Frequency
- the application processor 1331 and the video processor 1332 may be integrated into one processor.
- the external memory 1312 is a module provided outside the video module 1311 and having a storage device used by the video module 1311.
- the storage device of the external memory 1312 may be realized by any physical configuration, it is generally used to store a large amount of data such as image data in units of frames.
- a relatively inexpensive and large-capacity semiconductor memory such as a dynamic random access memory (DRAM).
- DRAM dynamic random access memory
- the power management module 1313 manages and controls the power supply to the video module 1311 (each configuration 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 of transmitting and receiving ends on the antenna side). As shown in FIG. 38, the front end module 1314 has, for example, an antenna unit 1351, a filter 1352, and an amplification unit 1353.
- the antenna unit 1351 includes an antenna that transmits and receives a wireless signal and a configuration around the antenna.
- the antenna unit 1351 transmits the signal supplied from the amplification unit 1353 as a wireless signal, and supplies the received wireless signal to the filter 1352 as an electric signal (RF signal).
- the filter 1352 performs filter processing or the like on the RF signal received via the antenna unit 1351, and supplies the processed RF signal to the RF module 1334.
- the amplification unit 1353 amplifies the RF signal supplied from the RF module 1334 and supplies it to the antenna unit 1351.
- the connectivity 1321 is a module having a function related to connection with the outside.
- the physical configuration of the connectivity 1321 is arbitrary.
- 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.
- the connectivity 1321 conforms to a wireless communication standard such as Bluetooth (registered trademark), IEEE 802.11 (for example, Wi-Fi (Wireless Fidelity (registered trademark)), NFC (Near Field Communication), IrDA (InfraRed Data Association)
- a module having a function, an antenna that transmits and receives a signal conforming to the standard, or the like may be included.
- the connectivity 1321 has a module having a communication function conforming to a wired communication standard such as Universal Serial Bus (USB) or High-Definition Multimedia Interface (HDMI (registered trademark)), or a terminal conforming to the standard. You may do so.
- the connectivity 1321 may have another data (signal) transmission function or the like such as an analog input / output terminal.
- the connectivity 1321 may include a device to which data (signal) is to be transmitted.
- a drive in which the connectivity 1321 reads data from or writes data to a recording medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory (not only a removable media drive but also a hard disk, solid state drive (SSD) , NAS (Network Attached Storage), etc.
- the connectivity 1321 may include an output device (such as a monitor or a speaker) of an image or sound.
- the camera 1322 is a module having a function of capturing an image of a subject and obtaining image data of the subject.
- the image data obtained by the imaging of the camera 1322 is supplied to, for example, a video processor 1332 and encoded.
- the sensor 1323 is, for example, an audio 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.
- the data detected by the sensor 1323 is, for example, 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, and conversely, the configuration described as a processor may be realized as a module.
- video set 1300 configured as described above, the present technology can be applied to the video processor 1332 as described later.
- video set 1300 can be implemented as a set to which the present technology is applied.
- FIG. 39 shows an example of a schematic configuration of a video processor 1332 (FIG. 38) to which the present technology is applied.
- the video processor 1332 receives an input of a video signal and an audio signal and decodes the encoded video data and audio data, and decodes the video signal and the audio data. And a function of reproducing and outputting an audio signal.
- the video processor 1332 includes a video input processing unit 1401, a first image scaling unit 1402, a second image scaling unit 1403, a video output processing unit 1404, a frame memory 1405, and a memory control unit 1406.
- the video processor 1332 has an encoding / decoding engine 1407, video ES (Elementary Stream) buffers 1408A and 1408B, and audio ES buffers 1409A and 1409B.
- the video processor 1332 further includes an audio encoder 1410, an audio decoder 1411, a multiplexer (MUX (Multiplexer)) 1412, a demultiplexer (DMUX (Demultiplexer)) 1413, and a stream buffer 1414.
- MUX Multiplexer
- DMUX demultiplexer
- the video input processing unit 1401 acquires a video signal input from, for example, the connectivity 1321 (FIG. 38) or the like, and converts the video signal into digital image data.
- the first image scaling unit 1402 performs format conversion, image scaling processing, and the like on image data.
- the second image scaling unit 1403 performs image scaling processing on the image data according to the format at the output destination via the video output processing unit 1404, or the same as the first image scaling unit 1402. Format conversion, image enlargement / reduction processing, etc.
- 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 or the like.
- 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, for example, as a semiconductor memory such as a DRAM.
- the memory control unit 1406 receives a synchronization signal from the encode / decode engine 1407 and controls write / read 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 control table 1406A is updated by the memory control unit 1406 in accordance with the processing executed by the encoding / decoding engine 1407, the first image scaling unit 1402, the second image scaling unit 1403 and the like.
- the encoding / decoding engine 1407 performs encoding processing of image data and decoding processing of a video stream which 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 image data as a video stream in the video ES buffer 1408A. Also, for example, the video stream is sequentially read from the video ES buffer 1408 B and decoded, and is sequentially written to the frame memory 1405 as image data. The encoding / decoding engine 1407 uses the frame memory 1405 as a work area in these encoding and decoding. Also, the encoding / decoding engine 1407 outputs a synchronization signal to the memory control unit 1406, for example, at the timing of starting processing for each macroblock.
- the video ES buffer 1408 A buffers the video stream generated by the encoding / decoding engine 1407 and supplies the buffer to the multiplexer (MUX) 1412.
- the video ES buffer 1408 B buffers the video stream supplied from the demultiplexer (DMUX) 1413 and supplies the video stream to the encode / decode engine 1407.
- the audio ES buffer 1409A buffers the audio stream generated by the audio encoder 1410 and supplies the buffer to the multiplexer (MUX) 1412.
- the audio ES buffer 1409 B buffers the audio stream supplied from the demultiplexer (DMUX) 1413 and supplies the audio stream to the audio decoder 1411.
- the audio encoder 1410 digitally converts, for example, an audio signal input from the connectivity 1321 or the like, and encodes the 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, into the audio ES buffer 1409A.
- the audio decoder 1411 decodes the audio stream supplied from the audio ES buffer 1409B, performs conversion to an analog signal, and the like, for example, and supplies the reproduced audio signal to, for example, the connectivity 1321 and the like.
- a multiplexer (MUX) 1412 multiplexes the video stream and the audio stream.
- the method of this multiplexing ie, the format of the bit stream generated by 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 format of the stream by multiplexing.
- the multiplexing unit (MUX) 1412 converts a video stream and an audio stream into a transport stream, which is a bit stream of a transfer format, by multiplexing the video stream and the audio stream.
- the multiplexing unit (MUX) 1412 converts the video stream and the audio stream into data (file data) of a file format for recording by multiplexing.
- a demultiplexing unit (DMUX) 1413 demultiplexes a bitstream in which a video stream and an audio stream are multiplexed in a method corresponding to multiplexing by the multiplexing unit (MUX) 1412. That is, the demultiplexer (DMUX) 1413 extracts a video stream and an audio stream from the bit stream read from the stream buffer 1414 (separate the video stream and the audio stream). That is, the demultiplexer (DMUX) 1413 can convert the format of the stream by demultiplexing (inverse conversion of conversion by the multiplexer (MUX) 1412).
- the demultiplexer unit (DMUX) 1413 acquires a transport stream supplied from, for example, the connectivity 1321 or the broadband modem 1333 via the stream buffer 1414, and demultiplexes the transport stream to obtain a video stream and an audio stream. And can be converted to Also, for example, the demultiplexer unit (DMUX) 1413 acquires file data read from various recording media by the connectivity 1321, for example, through the stream buffer 1414, and demultiplexes the file data to obtain a video stream and audio. It can be converted to a stream.
- the stream buffer 1414 buffers the bit stream.
- the stream buffer 1414 buffers the transport stream supplied from the multiplexing unit (MUX) 1412 and, for example, to the connectivity 1321 or the broadband modem 1333 or the like at a predetermined timing or based on an external request or the like. Supply.
- MUX multiplexing unit
- the stream buffer 1414 buffers the file data supplied from the multiplexing unit (MUX) 1412 and supplies the file data to, for example, the connectivity 1321 or the like at a predetermined timing or based on an external request or the like, Record on various recording media.
- MUX multiplexing unit
- the stream buffer 1414 buffers the transport stream acquired via, for example, the connectivity 1321 or the broadband modem 1333 or the like, and the demultiplexer unit (DMUX) at a predetermined timing or based on an external request or the like. Supply to 1413.
- DMUX demultiplexer unit
- the stream buffer 1414 buffers file data read from various recording media, for example, in the connectivity 1321 or the like, and at a predetermined timing or based on an external request or the like, the demultiplexer unit (DMUX) 1413. Supply to
- a video signal input from the connectivity 1321 or the like to the video processor 1332 is converted into digital image data of a predetermined format such as 4: 2: 2 Y / Cb / Cr format in the video input processing unit 1401, and is converted to frame memory 1405. It will be written sequentially.
- This digital image data is read by the first image scaling unit 1402 or the second image scaling unit 1403, and format conversion and scaling processing to a predetermined format such as 4: 2: 0 Y / Cb / Cr format is performed. And are written to the frame memory 1405 again.
- This image data is encoded by the encoding / decoding engine 1407 and written to the video ES buffer 1408A as a video stream.
- an audio signal input from the connectivity 1321 or the like to the video processor 1332 is encoded by the audio encoder 1410 and written as an audio stream to 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 multiplexer (MUX) 1412 and converted to a transport stream or file data.
- the transport stream generated by the multiplexer (MUX) 1412 is buffered in the stream buffer 1414 and then output to the external network via, for example, the connectivity 1321 or the broadband modem 1333.
- 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 and the like, and recorded in various recording media.
- a transport stream input from an external network to the video processor 1332 via the connectivity 1321 or the broadband modem 1333 is buffered in the stream buffer 1414 and then demultiplexed by the demultiplexer (DMUX) 1413.
- DMUX demultiplexer
- file data read from various recording media in connectivity 1321 and the like and input to the video processor 1332 is buffered in the stream buffer 1414 and then demultiplexed by the demultiplexer (DMUX) 1413. 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. Also, after the video stream is written to the video ES buffer 1408 B, it is sequentially read and decoded by the encoding / decoding engine 1407 and written to the frame memory 1405. The decoded image data is scaled by the second image scaling unit 1403 and written to the frame memory 1405. Then, the decoded image data is read by the video output processing unit 1404, converted into a predetermined format such as 4: 2: 2 Y / Cb / Cr format, and further converted into an analog signal, and the video signal is converted. Is reproduced and output.
- the present technology when the present technology is applied to the video processor 1332 configured as described above, the present technology according to each embodiment described above may be applied to the encoding / decoding engine 1407. That is, for example, the encoding / decoding engine 1407 may have the function of the image decoding apparatus 100 described above. By doing so, the video processor 1332 can obtain the same effect as the effect described above with reference to FIGS. 1 to 26.
- the present technology (that is, the function of the image decoding apparatus 100) may be realized by hardware such as a logic circuit or may be realized by software such as an embedded program. It may be realized by both of them.
- FIG. 40 shows another example of a schematic configuration of a video processor 1332 to which the present technology is applied.
- the video processor 1332 has a function of encoding / decoding video data in a predetermined scheme.
- the video processor 1332 has a control unit 1511, a display interface 1512, a display engine 1513, an image processing engine 1514, and an internal memory 1515. Also, the video processor 1332 has a codec engine 1516, a memory interface 1517, a multiplexing / demultiplexing unit (MUX DMUX) 1518, a network interface 1519, and a video interface 1520.
- MUX DMUX multiplexing / demultiplexing unit
- the 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.
- the control unit 1511 has, for example, a main CPU 1531, a sub CPU 1532 and a system controller 1533.
- the main CPU 1531 executes a program or 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 or the like 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.
- the sub CPU 1532 executes a child process or a subroutine of a program or the like executed by the main CPU 1531.
- the system controller 1533 controls operations of the main CPU 1531 and the sub CPU 1532 such as designating programs executed by the main CPU 1531 and the sub CPU 1532.
- the display interface 1512 outputs image data to, for example, the connectivity 1321 under the control of the control unit 1511.
- the display interface 1512 converts image data of digital data into an analog signal, and outputs the converted signal as a reproduced video signal or the image data of digital data as it is to a monitor of the connectivity 1321 or the like.
- the display engine 1513 performs various conversion processing such as format conversion, size conversion, color gamut conversion, and the like on the image data under the control of the control unit 1511 so as to match the hardware specifications of the monitor device or the like displaying the image. I do.
- the image processing engine 1514 performs predetermined image processing, such as filter processing for improving the image quality, on the image data under the control of the control unit 1511.
- the internal memory 1515 is a memory provided in the video processor 1332 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 between the display engine 1513, the image processing engine 1514, and the codec engine 1516.
- the internal memory 1515 stores data supplied from the display engine 1513, the image processing engine 1514, or the codec engine 1516, and the data is displayed on the display engine 1513, as required (eg, on request).
- the image processing engine 1514 or codec engine 1516 is supplied.
- This internal memory 1515 may be realized by any storage device, but is generally used to store small-capacity data such as image data in units of blocks and parameters, etc. It is desirable to realize by a semiconductor memory that has a relatively small capacity (compared to, for example, the external memory 1312) such as a static random access memory, but has a high response speed.
- the codec engine 1516 performs processing relating to encoding and decoding of image data.
- the encoding / decoding method to which this codec engine 1516 corresponds is arbitrary, and the number may be one or more.
- the codec engine 1516 may be provided with codec functions of a plurality of encoding / decoding methods, and one of them may be selected to encode image data or decode encoded data.
- the codec engine 1516 includes, for example, MPEG-2 Video 1541, AVC / H. 264 1542, HEVC / H. It has HEVC / H.265 (Multi-view) 1545 and MPEG-DASH 1551.
- the MPEG-2 Video 1541 is a functional block that encodes and decodes image data according to the MPEG-2 system.
- AVC / H.2641542 is a functional block that encodes or decodes image data according to the AVC method.
- HEVC / H.2651543 is a functional block that encodes and decodes image data according to the HEVC scheme.
- HEVC / H.265 (Scalable) 1544 is a functional block that performs scalable encoding or scalable decoding of image data according to the HEVC scheme.
- HEVC / H.265 (Multi-view) 1545 is a functional block that performs multi-view coding and multi-view decoding of image data according to the HEVC method.
- the MPEG-DASH 1551 is a functional block that transmits and receives image data in accordance with the MPEG-Dynamic Adaptive Streaming over HTTP (MPEG-DASH) method.
- MPEG-DASH is a technology that performs streaming of video using HTTP (HyperText Transfer Protocol), and selects and transmits, in units of segments, an appropriate one from a plurality of pieces of encoded data having different resolutions prepared in advance and the like. To be one of the features.
- the MPEG-DASH 1551 performs generation of a stream conforming to the standard, transmission control of the stream, and the like, and encoding and decoding of image data can be performed according to the MPEG-2 Video 1541 to HEVC / H.265 (Multi-view) 1545 described above.
- the memory interface 1517 is an interface for the external memory 1312. Data supplied from the image processing engine 1514 and the codec engine 1516 are supplied to the external memory 1312 via the memory interface 1517. Also, data read from the external memory 1312 is supplied to the video processor 1332 (image processing engine 1514 or codec engine 1516) via the memory interface 1517.
- a multiplexing / demultiplexing unit (MUX DMUX) 1518 multiplexes or demultiplexes various data related to an image, such as a bit stream of encoded data, an image data, a video signal, and the like.
- the method of multiplexing / demultiplexing is optional.
- 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.
- the multiplexing / demultiplexing unit (MUX DMUX) 1518 not only divides one data into a plurality of data but also adds predetermined header information etc. to each divided data.
- the multiplexing / demultiplexing unit (MUX DMUX) 1518 can convert the data format by multiplexing / demultiplexing.
- the multiplexing / demultiplexing unit (MUX DMUX) 1518 multiplexes a bit stream to transport stream, which is a bit stream of transfer format, or data of file format for recording (file data). Can be converted to Of course, inverse conversion is also possible by demultiplexing.
- the network interface 1519 is an interface for, for example, the broadband modem 1333 or the connectivity 1321.
- the video interface 1520 is an interface for the connectivity 1321, the camera 1322, and the like, for example.
- a transport stream is received from the external network via the connectivity 1321 or the broadband modem 1333 or the like
- the transport stream is supplied to the multiplexing / demultiplexing unit (MUX DMUX) 1518 via the network interface 1519. It is demultiplexed and decoded by the codec engine 1516.
- the image data obtained by the decoding of the codec engine 1516 is subjected, for example, to predetermined image processing by the image processing engine 1514, to predetermined conversion by the display engine 1513, and to, for example, the connectivity 1321 via the display interface 1512.
- the image is supplied and displayed on a monitor.
- image data obtained by the decoding of the codec engine 1516 is re-encoded by the codec engine 1516, multiplexed by the multiplexing / demultiplexing unit (MUX DMUX) 1518, and converted into file data, and video
- MUX DMUX multiplexing / demultiplexing unit
- the information is output to the connectivity 1321 or the like via the interface 1520 and recorded in various recording media.
- file data of encoded data obtained by encoding image data and read out from a recording medium (not shown) by the connectivity 1321 or the like is multiplexed / demultiplexed (MUX DMUX) via the video interface 1520.
- 1516 are demultiplexed and decoded by codec engine 1516.
- the image data obtained by the decoding of 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 supplied to, for example, the connectivity 1321 through the display interface 1512. , That image is displayed on the monitor.
- image data obtained by the decoding of 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, it is supplied to the connectivity 1321 or the broadband modem 1333 via the network interface 1519 and transmitted to another device (not shown).
- MUX DMUX multiplexing / demultiplexing unit
- image data and other data are exchanged between the processing units in the video processor 1332 using, for example, the internal memory 1515 or the external memory 1312.
- the power management module 1313 controls, for example, the power supply to the control unit 1511.
- the present technology when the present technology is applied to the video processor 1332 configured as described above, the present technology 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 for realizing the image decoding apparatus 100 described above. By doing so, the video processor 1332 can obtain the same effect as the effect described above with reference to FIGS. 1 to 26.
- the present technology (that is, the function of the image decoding apparatus 100) may be realized by hardware such as a logic circuit or may be realized by software such as an embedded program. It may be realized by both of them.
- 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.
- a three-dimensional stacked LSI in which a plurality of semiconductors are stacked may be used.
- it may be realized by a plurality of LSIs.
- Video set 1300 can be incorporated into various devices for processing image data.
- the video set 1300 can be incorporated into the television 900 (FIG. 34), the mobile phone 920 (FIG. 35), the recording / reproducing device 940 (FIG. 36), the imaging device 960 (FIG. 37), and the like.
- the device can obtain the same effect as the effect described above with reference to FIGS.
- each configuration of the video set 1300 described above can be implemented as a configuration to which the present technology is applied, as long as the video processor 1332 is included.
- the video processor 1332 can be implemented as a video processor to which the present technology is applied.
- the processor or the video module 1311 or the like indicated by the dotted line 1341 can be implemented as a processor or module or the like to which the present technology is applied.
- the video module 1311, the external memory 1312, the power management module 1313, and the front end module 1314 may be combined to be implemented as a video unit 1361 to which the present technology is applied.
- 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.
- 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. 34), a mobile phone 920 (FIG. 35), a recording / reproducing device 940 (FIG. 36) It can be incorporated into the imaging device 960 (FIG. 37) or the like. Then, by incorporating any of the configurations to which the present technology is applied, the device can obtain the same effects as the effects described above with reference to FIGS. 1 to 26 as in the case of the video set 1300. .
- the method of transmitting such information is not limited to such an example.
- the information may be transmitted or recorded as separate data associated with the coded bit stream without being multiplexed into the coded bit stream.
- the term “associate” allows an image (a slice or a block, which may be a part of an image) included in a bitstream to be linked at the time of decoding with information corresponding to the image. Means That is, the information may be transmitted on a different transmission path from the image (or bit stream).
- the information may be recorded on a recording medium (or another recording area of the same recording medium) different from the image (or bit stream).
- the information and the image (or bit stream) may be associated with each other in any unit such as, for example, a plurality of frames, one frame, or a part in a frame.
- a decoding unit that generates decoded image data by decoding encoded data obtained by encoding image data for each CU (Coding Unit) that is recursively divided
- An image decoding apparatus comprising: a filter processing unit that performs filter processing on the decoded image data generated by the decoding unit according to information set for each data unit corresponding to header information of the encoded data.
- the filter processing unit skips the reference to the information set for each CU unit to be referred to when performing the filter process, and performs the filter process on the decoded image data as described in (1) Image decoding device.
- the filter processing unit sets for each CU to be referred to when performing the filtering process.
- the image decoding apparatus according to (2) which skips the reference to the stored information.
- the filter processing unit performs the filter process on the decoded image data in units of a coding tree block (CTB).
- CTB coding tree block
- the image decoding apparatus according to (5).
- the filter processing unit skips the reference to the information set for each CU to be referred to when the filter processing is performed.
- the image according to (6) Decoding device When the picture is constituted by one slice, the filter processing unit skips the reference to the information set for each CU to be referred to when the filter processing is performed.
- the filter processing unit is set for each CU unit to be referred to when the filter processing is performed when slice_qp_delta of each slice header in the picture is the same when the picture is configured of a plurality of slices.
- the image decoding device according to (6) or (7), which skips the reference to the information.
- the image decoding apparatus according to any one of (3) to (8), wherein the filter processing unit performs sample adaptive offset processing as the filter processing.
- the image decoding apparatus as described in (9).
- (11) Decoded image data is generated by decoding encoded data obtained by encoding image data for each CU (Coding Unit) recursively divided, An image decoding method for filtering the generated decoded image data according to information set for each data unit corresponding to header information of the encoded data.
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Abstract
Description
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
cu_qp_delta_enabled_flag == 0
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
1.第1の実施の形態(画像復号装置)
2.第2の実施の形態(多視点画像復号装置)
3.第3の実施の形態(階層画像復号装置)
4.第4の実施の形態(コンピュータ)
5.第5の実施の形態(応用例)
6.第6の実施の形態(セット・ユニット・モジュール・プロセッサ)
<HEVC>
HEVCでは固定サイズの符号化単位として コーディングツリーブロック(CTB(Coding tree block))が定義されている。1ピクチャの画像データは、そのCTBで分割されて符号化されており、デコーダにおいては、各CTBの符号化データが順に復号される。そのCTBはさらに8x8, 16x16, 32x32, 64x64のコーディングユニット(CU(Coding Unit))に分割することが可能である。
そこで、符号化データのヘッダ情報に対応するデータ単位毎に設定された情報に応じて、画像データが符号化された符号化データを再帰的に分割されたCU(Coding Unit)毎に復号することにより生成された復号画像データに対してフィルタ処理を行うようにする。このようにすることにより、不要に小さなデータ単位の情報を用いることを抑制することができ、復号処理の負荷の増大を抑制することができる。
図4は、本技術を適用した画像処理装置の一態様である画像復号装置の主な構成例を示すブロック図である。図4に示される画像復号装置100は、図示せぬ画像符号化装置が画像データをHEVC符号化方式により符号化して生成した符号化データを復号する。
図7にそのフィルタ制御部122の主な構成例を示す。図7に示されるように、フィルタ制御部122は、デブロッキングフィルタ用制御情報生成部131とSAO用制御情報生成部132とを有する。
図13は、ループフィルタ116の主な構成例を示すブロック図である。図13に示されるように、ループフィルタ116は、デブロッキングフィルタ処理部141およびSAO処理部142を有する。
次に、画像復号装置100により実行される各処理の流れの例を説明する。最初に、復号処理の流れの例を、図16のフローチャートを参照して説明する。
次に、このような復号処理のステップS103において実行されるフィルタ制御情報生成処理の流れの例を、図17のフローチャートを参照して説明する。
次に、図18のフローチャートを参照して、図17のステップS121において実行されるデブロッキングフィルタ用制御情報生成処理の流れの例を説明する。
次に、図19のフローチャートを参照して、図17のステップS122において実行されるSAO用制御情報生成処理の流れの例を説明する。
次に、図16のステップS108において実行されるループフィルタ処理の流れの例を、図20のフローチャートを参照して説明する。
次に、図21のフローチャートを参照して、図20のステップS161において実行されるデブロッキングフィルタ処理の流れの例を説明する。
次に、図22のフローチャートを参照して、図21のステップS173において実行されるCU単位デブロッキングフィルタ処理の流れの例を説明する。
次に、図23のフローチャートを参照して、図21のステップS172において実行されるCTB単位デブロッキングフィルタ処理の流れの例を説明する。
次に、図24のフローチャートを参照して、図20のステップS162において実行されるSAO処理の流れの例を説明する。
次に、図25のフローチャートを参照して、図24のステップS213において実行されるCU単位SAO処理の流れの例を説明する。
次に、図26のフローチャートを参照して、図24のステップS212において実行されCTB単位SAO処理の流れの例を説明する。
<多視点画像復号への適用>
上述した一連の処理は、多視点画像復号に適用することができる。図27は、多視点画像符号化方式の一例を示す。
図28は、上述した多視点画像符号化を行う多視点画像符号化装置を示す図である。図28に示されるように、多視点画像符号化装置600は、符号化部601、符号化部602、および多重化部603を有する。
図29は、上述した多視点画像復号を行う多視点画像復号装置を示す図である。図29に示されるように、多視点画像復号装置610は、逆多重化部611、復号部612、および復号部613を有する。
<階層画像復号への適用>
また、上述した一連の処理は、階層画像復号(スケーラブル復号)に適用することができる。図30は、階層画像符号化方式の一例を示す。
図31は、上述した階層画像符号化を行う階層画像符号化装置を示す図である。図31に示されるように、階層画像符号化装置620は、符号化部621、符号化部622、および多重化部623を有する。
図32は、上述した階層画像復号を行う階層画像復号装置を示す図である。図32に示されるように、階層画像復号装置630は、逆多重化部631、復号部632、および復号部633を有する。
<コンピュータ>
上述した一連の処理は、ハードウエアにより実行させることもできるし、ソフトウエアにより実行させることもできる。一連の処理をソフトウエアにより実行する場合には、そのソフトウエアを構成するプログラムが、コンピュータにインストールされる。ここでコンピュータには、専用のハードウエアに組み込まれているコンピュータや、各種のプログラムをインストールすることで、各種の機能を実行することが可能な、例えば汎用のパーソナルコンピュータ等が含まれる。
<第1の応用例:テレビジョン受像機>
図34は、上述した実施形態を適用したテレビジョン装置の概略的な構成の一例を示している。テレビジョン装置900は、アンテナ901、チューナ902、デマルチプレクサ903、デコーダ904、映像信号処理部905、表示部906、音声信号処理部907、スピーカ908、外部インタフェース(I/F)部909、制御部910、ユーザインタフェース(I/F)部911、及びバス912を備える。
図35は、上述した実施形態を適用した携帯電話機の概略的な構成の一例を示している。携帯電話機920は、アンテナ921、通信部922、音声コーデック923、スピーカ924、マイクロホン925、カメラ部926、画像処理部927、多重分離部928、記録再生部929、表示部930、制御部931、操作部932、及びバス933を備える。
図36は、上述した実施形態を適用した記録再生装置の概略的な構成の一例を示している。記録再生装置940は、例えば、受信した放送番組の音声データ及び映像データを符号化して記録媒体に記録する。また、記録再生装置940は、例えば、他の装置から取得される音声データ及び映像データを符号化して記録媒体に記録してもよい。また、記録再生装置940は、例えば、ユーザの指示に応じて、記録媒体に記録されているデータをモニタ及びスピーカ上で再生する。このとき、記録再生装置940は、音声データおよび映像データを復号する。
図37は、上述した実施形態を適用した撮像装置の概略的な構成の一例を示している。撮像装置960は、被写体を撮像して画像を生成し、画像データを符号化して記録媒体に記録する。
<実施のその他の例>
以上において本技術を適用する装置やシステム等の例を説明したが、本技術は、これに限らず、このような装置またはシステムを構成する装置に搭載するあらゆる構成、例えば、システムLSI(Large Scale Integration)等としてのプロセッサ、複数のプロセッサ等を用いるモジュール、複数のモジュール等を用いるユニット、ユニットにさらにその他の機能を付加したセット等(すなわち、装置の一部の構成)として実施することもできる。
本技術をセットとして実施する場合の例について、図38を参照して説明する。図38は、本技術を適用したビデオセットの概略的な構成の一例を示している。
図39は、本技術を適用したビデオプロセッサ1332(図38)の概略的な構成の一例を示している。
図40は、本技術を適用したビデオプロセッサ1332の概略的な構成の他の例を示している。図40の例の場合、ビデオプロセッサ1332は、ビデオデータを所定の方式で符号化・復号する機能を有する。
ビデオセット1300は、画像データを処理する各種装置に組み込むことができる。例えば、ビデオセット1300は、テレビジョン装置900(図34)、携帯電話機920(図35)、記録再生装置940(図36)、撮像装置960(図37)等に組み込むことができる。ビデオセット1300を組み込むことにより、その装置は、図1乃至図26を参照して上述した効果と同様の効果を得ることができる。
(1) 画像データが符号化された符号化データを再帰的に分割されたCU(Coding Unit)毎に復号することにより、復号画像データを生成する復号部と、
前記符号化データのヘッダ情報に対応するデータ単位毎に設定された情報に応じて、前記復号部により生成された前記復号画像データに対してフィルタ処理を行うフィルタ処理部と
を備える画像復号装置。
(2) 前記フィルタ処理部は、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップして、前記復号画像データに対して前記フィルタ処理を行う
(1)に記載の画像復号装置。
(3) 前記フィルタ処理部は、前記ヘッダ情報の値に対する条件がCU単位毎に設定された情報を参照する必要がないことを示す場合、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
(2)に記載の画像復号装置。
(4) 前記フィルタ処理部は、CTB(Coding Tree Block)単位で、前記復号画像データに対してフィルタ処理を行う
(3)に記載の画像復号装置。
(5) 前記フィルタ処理部は、前記フィルタ処理として、デブロッキングフィルタ処理を行う
(3)または(4)に記載の画像復号装置。
(6) 前記フィルタ処理部は、前記条件として以下の式を満たす場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする:
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
cu_qp_delta_enabled_flag == 0
(5)に記載の画像復号装置。
(7) 前記フィルタ処理部は、ピクチャが1つのスライスで構成される場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
(6)に記載の画像復号装置。
(8) 前記フィルタ処理部は、ピクチャが複数のスライスで構成される場合に、ピクチャ内の各スライスヘッダのslice_qp_deltaが同じ場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
(6)または(7)に記載の画像復号装置。
(9) 前記フィルタ処理部は、前記フィルタ処理として、サンプルアダプティブオフセット処理
を行う
(3)乃至(8)のいずれかに記載の画像復号装置。
(10) 前記フィルタ処理部は、前記条件として以下の式を満たす場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする:
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
(9)に記載の画像復号装置。
(11) 画像データが符号化された符号化データを再帰的に分割されたCU(Coding Unit)毎に復号することにより、復号画像データを生成し、
前記符号化データのヘッダ情報に対応するデータ単位毎に設定された情報に応じて、生成された前記復号画像データに対してフィルタ処理を行う
画像復号方法。
Claims (11)
- 画像データが符号化された符号化データを再帰的に分割されたCU(Coding Unit)毎に復号することにより、復号画像データを生成する復号部と、
前記符号化データのヘッダ情報に対応するデータ単位毎に設定された情報に応じて、前記復号部により生成された前記復号画像データに対してフィルタ処理を行うフィルタ処理部と
を備える画像復号装置。 - 前記フィルタ処理部は、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップして、前記復号画像データに対して前記フィルタ処理を行う
請求項1に記載の画像復号装置。 - 前記フィルタ処理部は、前記ヘッダ情報の値に対する条件がCU単位毎に設定された情報を参照する必要がないことを示す場合、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
請求項2に記載の画像復号装置。 - 前記フィルタ処理部は、CTB(Coding Tree Block)単位で、前記復号画像データに対してフィルタ処理を行う
請求項3に記載の画像復号装置。 - 前記フィルタ処理部は、前記フィルタ処理として、デブロッキングフィルタ処理を行う
請求項3に記載の画像復号装置。 - 前記フィルタ処理部は、前記条件として以下の式を満たす場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする:
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
cu_qp_delta_enabled_flag == 0
請求項5に記載の画像復号装置。 - 前記フィルタ処理部は、ピクチャが1つのスライスで構成される場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
請求項6に記載の画像復号装置。 - 前記フィルタ処理部は、ピクチャが複数のスライスで構成される場合に、ピクチャ内の各スライスヘッダのslice_qp_deltaが同じ場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする
請求項6に記載の画像復号装置。 - 前記フィルタ処理部は、前記フィルタ処理として、サンプルアダプティブオフセット処理
を行う
請求項3に記載の画像復号装置。 - 前記フィルタ処理部は、前記条件として以下の式を満たす場合に、前記フィルタ処理を行う際に参照するCU単位毎に設定された情報に対する参照をスキップする:
pcm_loop_filter_disabled_flag == 0
transquant_bypass_enabled_flag ==0
請求項9に記載の画像復号装置。 - 画像データが符号化された符号化データを再帰的に分割されたCU(Coding Unit)毎に復号することにより、復号画像データを生成し、
前記符号化データのヘッダ情報に対応するデータ単位毎に設定された情報に応じて、生成された前記復号画像データに対してフィルタ処理を行う
画像復号方法。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019530311A (ja) * | 2016-09-02 | 2019-10-17 | ヴィド スケール インコーポレイテッド | 360度ビデオ情報をシグナリングするための方法およびシステム |
EP3989176A4 (en) * | 2019-07-17 | 2022-08-17 | Sony Group Corporation | INFORMATION PROCESSING DEVICE AND METHOD |
KR20220100047A (ko) * | 2019-12-23 | 2022-07-14 | 엘지전자 주식회사 | 필터링 기반 영상 코딩 장치 및 방법 |
CN115104318A (zh) * | 2019-12-23 | 2022-09-23 | Lg电子株式会社 | 基于子画面的图像编码设备和方法 |
GB2593222A (en) * | 2020-03-20 | 2021-09-22 | Canon Kk | High level syntax for video coding and decoding |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013141094A (ja) * | 2011-12-28 | 2013-07-18 | Sharp Corp | 画像復号装置、画像符号化装置、画像フィルタ装置、および符号化データのデータ構造 |
JP2013229866A (ja) * | 2012-03-30 | 2013-11-07 | Jvc Kenwood Corp | 画像復号装置、画像復号方法、画像復号プログラム、受信装置、受信方法、及び受信プログラム |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8055783B2 (en) * | 2005-08-22 | 2011-11-08 | Utc Fire & Security Americas Corporation, Inc. | Systems and methods for media stream processing |
JP5850214B2 (ja) * | 2011-01-11 | 2016-02-03 | ソニー株式会社 | 画像処理装置および方法、プログラム、並びに記録媒体 |
IN2014CN04356A (ja) * | 2012-01-19 | 2015-09-04 | Mitsubishi Electric Corp | |
CA2868088A1 (en) * | 2012-01-20 | 2013-07-25 | Samsung Electronics Co., Ltd. | Video encoding method and apparatus and video decoding method and apparatus using unified syntax for parallel processing |
WO2013145773A1 (ja) | 2012-03-30 | 2013-10-03 | 株式会社Jvcケンウッド | 画像符号化装置、画像符号化方法、画像符号化プログラム、送信装置、送信方法、及び送信プログラム、並びに画像復号装置、画像復号方法、画像復号プログラム、受信装置、受信方法、及び受信プログラム |
US9706200B2 (en) * | 2012-06-18 | 2017-07-11 | Qualcomm Incorporated | Unification of signaling lossless coding mode and pulse code modulation (PCM) mode in video coding |
KR102111436B1 (ko) * | 2014-01-06 | 2020-05-18 | 에스케이 텔레콤주식회사 | 다중 영상의 단일 비트 스트림 생성방법 및 생성장치 |
-
2015
- 2015-03-17 JP JP2016511513A patent/JP6824034B2/ja active Active
- 2015-03-17 US US15/128,008 patent/US10440397B2/en not_active Expired - Fee Related
- 2015-03-17 WO PCT/JP2015/057837 patent/WO2015151791A1/ja active Application Filing
-
2019
- 2019-05-28 US US16/423,399 patent/US10779009B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013141094A (ja) * | 2011-12-28 | 2013-07-18 | Sharp Corp | 画像復号装置、画像符号化装置、画像フィルタ装置、および符号化データのデータ構造 |
JP2013229866A (ja) * | 2012-03-30 | 2013-11-07 | Jvc Kenwood Corp | 画像復号装置、画像復号方法、画像復号プログラム、受信装置、受信方法、及び受信プログラム |
Non-Patent Citations (1)
Title |
---|
"Recommendation ITU-T H.265", HIGH EFFICIENCY VIDEO CODING, April 2013 (2013-04-01), pages 46,50,152 - 153,157- 159, XP055224026 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021101204A1 (ko) * | 2019-11-18 | 2021-05-27 | 엘지전자 주식회사 | 필터링을 위한 정보의 시그널링 기반 영상 코딩 장치 및 방법 |
WO2021101205A1 (ko) * | 2019-11-18 | 2021-05-27 | 엘지전자 주식회사 | 영상 코딩 장치 및 방법 |
WO2021101200A1 (ko) * | 2019-11-18 | 2021-05-27 | 엘지전자 주식회사 | 루프 필터링을 제어하기 위한 영상 코딩 장치 및 방법 |
WO2021101203A1 (ko) * | 2019-11-18 | 2021-05-27 | 엘지전자 주식회사 | 필터링 기반 영상 코딩 장치 및 방법 |
CN115023954A (zh) * | 2019-11-18 | 2022-09-06 | Lg电子株式会社 | 用于控制环路滤波的图像编码装置和方法 |
RU2801594C1 (ru) * | 2019-11-18 | 2023-08-11 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Способ и устройство кодирования изображения для управления контурной фильтрацией |
RU2802374C1 (ru) * | 2019-11-18 | 2023-08-28 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Устройство и способ кодирования изображения для управления контурной фильтрацией |
US11743468B2 (en) | 2019-11-18 | 2023-08-29 | Lg Electronics Inc. | Filtering-based image coding device and method |
RU2810653C2 (ru) * | 2019-11-18 | 2023-12-28 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Способ и устройство кодирования изображения для управления контурной фильтрацией |
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US10440397B2 (en) | 2019-10-08 |
US20170099501A1 (en) | 2017-04-06 |
JPWO2015151791A1 (ja) | 2017-04-13 |
US10779009B2 (en) | 2020-09-15 |
US20190281323A1 (en) | 2019-09-12 |
JP6824034B2 (ja) | 2021-02-03 |
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