JP2006303987A - Image encoder and image encoding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image encoder and an image encoding method in which dynamic image encoding can be carried out efficiently, even when it is carried out in parallel with static image encoding. <P>SOLUTION: A dynamic image encoding section 103 generates encoded data by performing dynamic image encoding on an inputted image. A still image encoding section 104 generates encoded data and encoded information, by performing still image encoding on an inputted image using DCT processing. An encoding control section 106 estimates the variations of an encoding object image in dynamic image encoding at the dynamic image encoding section 103, based on the DCT operation results from the still image encoding section 104 and controls the encoding parameters in dynamic image encoding. Consequently, deframe or degradation in image quality, due to increase in generated amount of code, can be suppressed during dynamic image encoding. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image encoding device and an image encoding method suitable for use in a surveillance camera.

  2. Description of the Related Art Conventionally, a technique is known in which a surveillance camera captures an image of a surveillance area, encodes the obtained imaging data as a moving image or a still image, and transmits the encoded data to a monitor or an image storage device via a communication line (for example, a patent) Reference 1).

  The technique disclosed in Japanese Patent Laid-Open No. 2004-228561 usually obtains a high-quality image by performing monitoring using a moving image and transmitting a still image according to the moving image when any change occurs in the image. .

JP 2000-184367 A

  However, in the conventional image encoding device, when transmitting or storing still image encoded data in accordance with moving image encoded data, since the moving image encoding process and the still image encoding process are performed independently, There is a problem that the moving image encoding process cannot be performed efficiently. For example, if a video encoding process is performed on an image with a large change and the encoding type is set to inter encoding, frame dropping due to an increase in the amount of generated code or an increase in the amount of generated code may occur compared to the intra encoding process. In order to suppress this, the moving image encoding process is performed with the compression rate increased, thereby degrading the image quality.

  The present invention has been made in view of such circumstances, and an image encoding apparatus capable of efficiently performing a moving image encoding process even when moving image encoding and still image encoding are performed in parallel, and An object is to provide an image encoding method.

The above object can be achieved by the following constitution and method.
(1) An image encoding device, a plurality of image encoding units that encode an image to generate encoded data and encoding information, and at least one image encoding unit among the plurality of image encoding units And encoding control means for controlling the encoding parameters of the encoding process performed by the other image encoding means based on the encoding information, using the result of the image encoding performed as described above as the encoding information.

(2) An image encoding device, wherein a plurality of image encoding units that encode an image to generate encoded data and encoding information, and at least one of the plurality of image encoding units is an encoding process A discrete cosine transform calculation process is performed as a part of the image, and the result of the discrete cosine transform calculation process is used as the encoded information, and the encoding parameters of the encoding process performed by the other image encoding means are controlled by the encoded information. Encoding control means.

(3) In the image coding device according to (1) or (2), the image coding apparatus includes a cutting unit that cuts out a part or all of an image, and the coding control unit depends on a cutting position of the image. The encoding parameter of the encoding process performed by the image encoding means is controlled.

(4) The image encoding device according to (1) or (2), further including attention area setting means for setting an attention area in an image, wherein the encoding control means corresponds to the attention area in the image. Then, the encoding parameter of the encoding process performed by the image encoding means is controlled.

(5) In the image encoding device according to any one of (1) to (4), the encoded information is generated code amount information generated during the image encoding process and used during the image encoding process. The encoding control means controls the encoding parameters of the encoding process performed by the image encoding means in accordance with the generated code amount information and the quantization parameters.

(6) An image encoding method, wherein at least one of a plurality of image encoding processes each performing image processing performs a discrete cosine transform calculation process as a part of the image encoding process, and the discrete cosine transform calculation process As a result, the encoding parameters of the other image encoding processes are controlled by the encoding information.

(7) In the image encoding method described in (6) above, a part or all of an image is cut out, and the encoding parameter of the other image encoding process is controlled according to the cutout position.

(8) In the image encoding method described in (6) above, an attention area in an image is set, and encoding parameters of the other image encoding processing are controlled according to the set attention area.

(9) In the image encoding method according to any one of (6) to (8), the encoded information includes generated code amount information generated during the image encoding process and a quantum used during the image encoding process. Encoding parameter information is included, and the encoding parameter of the other image encoding processing is controlled according to the generated code amount information and the quantization parameter.

  In the image encoding device described in (1) above, frame dropping or image quality due to an increase in the amount of generated code when encoding a moving image is controlled by controlling the encoding parameter of the moving image encoding process from the image encoding result. Deterioration can be suppressed.

  In the image encoding device described in (2) above, when encoding a moving image by controlling an encoding parameter of the moving image encoding process from a discrete cosine transform calculation result generated in the still image encoding process. It is possible to suppress frame dropping and image quality degradation due to an increase in the amount of generated codes.

  In the image encoding device described in (3) above, even when the area of the image to be subjected to the still image encoding process is different from that of the image to be subjected to the moving image encoding process, the encoding parameter of the moving image encoding process is controlled. Further, it is possible to suppress frame dropping and image quality deterioration due to an increase in the amount of generated codes during moving image encoding.

  In the image encoding device described in (4) above, by estimating the change in the attention area of the encoding target image of the moving image encoding process and controlling the encoding parameter of the moving image encoding process of the attention area, It is possible to suppress frame dropping and image quality degradation due to an increase in the amount of generated code at the time of moving image encoding.

  In the image encoding device described in (5) above, the code amount information and quantization generated by the still image encoding process when it is determined that the image change is large and the moving image encoding target image is to be intra-encoded. By predicting the code amount generated in the moving image encoding process from the parameters and controlling the moving image encoding process, it is possible to suppress frame dropping and image quality degradation due to an increase in the generated code amount during moving image encoding.

  In the image encoding method described in (6) above, when encoding a moving image by controlling the encoding parameter of the moving image encoding process from the discrete cosine transform calculation result generated in the still image encoding process. It is possible to suppress frame dropping and image quality degradation due to an increase in the amount of generated codes.

  In the image coding method described in (7) above, even when the area of the image to be subjected to the still image coding process is different from that of the image to be subjected to the moving image coding process, the coding parameter of the moving image coding process is controlled. Further, it is possible to suppress frame dropping and image quality deterioration due to an increase in the amount of generated codes during moving image encoding.

  In the image encoding method described in (8) above, by estimating the change in the attention area of the encoding target image of the moving image encoding process and controlling the encoding parameter of the moving image encoding process of the attention area, It is possible to suppress frame dropping and image quality degradation due to an increase in the amount of generated code at the time of moving image encoding.

  In the image encoding method described in (9) above, when the image change is large and it is determined that the moving image encoding target image is to be intra-encoded, code amount information and quantization generated by the still image encoding process By predicting the code amount generated in the moving image encoding process from the parameters and controlling the moving image encoding process, it is possible to suppress frame dropping and image quality degradation due to an increase in the generated code amount during moving image encoding.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 1 of the present invention. In this figure, an image encoding apparatus 100 according to the present embodiment includes an imaging unit 101, an image input unit 102, a moving image encoding unit 103, a still image encoding unit 104, a transmission unit 105, and an encoding unit. A control unit 106 and a communication line 107 are provided.

  The image capturing unit 101 captures a subject image, and converts an image sensor composed of a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor, etc., and a signal input to the image sensor into digital image data. An A / D (Analog / Digital) converter is provided. The image input unit 102 includes a buffer such as a RAM that temporarily stores the image data, and performs the acquisition of the image data from the imaging unit 101 and the input of the image data to the subsequent stage in parallel.

  The moving image encoding unit 103 performs moving image encoding on the image input from the image input unit 101 to generate encoded data. An example of moving picture coding is H.264. 261, H.H. H.263, MPEG-1, MPEG-2, and MPEG-4. H. 261 and H.H. H.263 is one of the standards for the video compression coding system recommended by the International Telecommunications Union. H. 263 is H.264. It is an improvement and development of H.261. H. H.261 and H.264. H.263 uses an algorithm that combines motion compensation interframe coding and DCT (Discrete Cosine Transform). In H.263, half-pixel precision motion compensation and variable length coding are improved to increase the compression efficiency.

  The still image encoding unit 104 performs still image encoding on the image input from the image input unit 101 using DCT calculation processing, and generates encoded data and encoded information. An example of a still image encoding process that uses DCT arithmetic processing is JPEG encoding processing. Moreover, as an example of encoding information, a DC (direct current) component which is a part of a DCT calculation result can be cited.

  The transmission unit 105 transmits the encoded data generated by the moving image encoding unit 103 or the still image encoding unit 104 to a wireless or wired communication line 107. The encoding control unit 106 includes a CPU, a ROM, a RAM, a timer, and the like, and performs the video encoding process of the video encoding unit 103 based on the encoding information generated by the still image encoding unit 104. The encoding type and encoding execution are controlled, information on the format of image data input by the image input unit 102 to the subsequent stage is managed, and transmission control of the transmission unit 105 is performed.

  In FIG. 1, one moving image encoding unit 103 and one still image encoding unit 104 are shown, but there may be a plurality of each.

  The operation of the image coding apparatus 100 configured as described above will be described. The imaging unit 101 captures a subject, converts it into image data, and inputs the image data to the image input unit 102. The image data input to the image input unit 102 is input to the moving image encoding unit 103 and the still image encoding unit 104, respectively. The moving image encoding unit 103 and the still image encoding unit 104 are controlled by the encoding control unit 106, and the moving image encoding unit 103 encodes the input image to generate encoded data. The still image encoding unit 104 encodes the input image as a still image, and generates encoded data and encoding information. The transmission unit 105 transmits the encoded data generated by the moving image encoding unit 103 and the encoded data generated by the still image encoding unit 104.

  Subsequently, the control of the moving image encoding process performed by the encoding control unit 106 will be described below using the flowchart of FIG. 2 as an example in which a plurality of still image encoding processes have already been performed. .

  First, the encoding information (that is, the DCT calculation result) generated by the still image encoding process performed on the image at the time close to the acquisition time of the current image that is the target image of the moving image encoding process is acquired. Then, the encoding information (that is, the DCT calculation result) generated by the still image encoding process performed on the image at the time close to the acquisition time of the predicted reference image that is the target image of the moving image encoding process is acquired ( Step S101). Here, the DCT calculation result when the still image encoding process is performed on the image at the time close to the acquisition time of the current image that is the target image of the moving image encoding process is “A”, and the target of the moving image encoding process The DCT calculation result when the still image encoding process is performed on an image at a time close to the predicted reference image to be an image is “B”. The difference between “A” and “B” is calculated (step S102). For the calculation of the difference between “A” and “B”, a method of calculating the sum of absolute differences of DC coefficients at the same block positions of “A” and “B”, or a DC included in “A” A method of obtaining a difference between the sum of the coefficients and the sum of the DC coefficients included in “B” can be considered.

  Subsequently, the encoding type of the moving image encoding process is determined from the difference result calculated in step S102 (step S103). In the determination, if the difference is larger than the threshold value, the coding type of the moving image coding process is set to intra coding. If the difference is smaller than the threshold value, the coding type of the moving image coding process is set to the inter code. It can be considered to be. The threshold value may be stored in advance in the encoding control unit 106 or may be set from the outside. Next, the encoding type determined in step S103 is designated as the encoding type of the moving image encoding process, and execution of the moving image encoding process is instructed (step S104).

  As described above, according to the image coding apparatus 100 of the present embodiment, a moving image coding is performed by estimating a change in a coding target image of the moving image coding process from a DCT calculation result generated by the still image coding process. Since the encoding parameter of the process is controlled, it is possible to suppress frame dropping and image quality deterioration due to an increase in the amount of generated code at the time of moving image encoding.

(Embodiment 2)
FIG. 3 is a block diagram showing a schematic configuration of the image coding apparatus according to Embodiment 2 of the present invention. In this figure, the same components as those in FIG. 1 described above are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 3, the image coding apparatus 200 according to the present embodiment has the same functions as those of the clipping unit 201 and the coding control unit 106 in addition to the same configuration as the image coding apparatus 100 according to the first embodiment described above. And an encoding control unit 202 having a function of controlling the cutout image 201 to manage the information of the cutout image. The cutout unit 201 cuts out and outputs part or all of the input image. The encoding control unit 202 controls the cutout unit 201 to manage information on the cutout image. Examples of information to be managed include “cutout position” and “cutout size”.

  In FIG. 3, one moving image encoding unit 103 and one still image encoding unit 104 are shown, but there may be a plurality of each.

  The operation of the image coding apparatus 200 configured as described above will be described. 1 are denoted by the same reference numerals as those in FIG. 1 and description thereof is omitted.

  A part or all of the image from the image input unit 102 is cut out by the cutout unit 201 and input to the moving image coding unit 103 and the still image coding unit 104, respectively. The moving image encoding unit 103 and the still image encoding unit 104 encode the images from the clipping unit 201, respectively. Note that the image cut-out position and the cut-out size may be held in advance in the cut-out unit 201 or may be instructed from the outside.

  Subsequently, the control of the moving image encoding process performed by the encoding control unit 202 will be described below using the flowchart of FIG. 4 as an example in which a plurality of still image encoding processes are already performed. .

  First, from the region of the image cut out by the cutout unit 201, the overlap region between the cut image of the moving image encoding target image and the cut image of the still image encoding target image is confirmed. Performs the processing from step S202 to step S204 (step S201). Acquires encoding information (that is, a DCT calculation result) generated by a still image encoding process performed on an image at a time close to the acquisition time of the current image that is a target image of the moving image encoding process, The encoding information (that is, the DCT calculation result) generated by the still image encoding process performed on the image at the time close to the acquisition time of the predicted reference image that is the target image of the image encoding process is acquired (step S202). ).

  Subsequently, the difference between the obtained two DCT calculation results is calculated (step S203). Next, the encoding type of the moving image encoding process is determined from the difference result calculated in step S203 (step S204). The processing from step S201 to step S204 is performed on the entire encoding target image area (step S205). Next, the encoding type determined in step S204 is designated as the encoding type of the moving image encoding process, and execution of the moving image encoding process is instructed (step S206).

  Note that, regarding the overlap region confirmation performed in step S201, the cut-out image size of the moving image encoding target image is smaller than the cut-out image size of the still image encoding target image, and the still image encoding target image is cut out. In the case where it is included in the output image area, it is conceivable that the area of the clipped image of the moving image encoding process target image is set as the overlapping area. In addition, the cut-out image size of the moving image encoding target image is larger than the cut-out image size of the still image encoding target image, and the cut-out image area of the still image encoding target image is the moving image encoding processing target. When included in the cut-out image area of the image, the coding type determined in the overlapping area may be applied only to the overlapping area in the moving image encoding processing target image. You may apply to the whole encoding process target image.

  Also, if the cut-out image of the moving image encoding target image and the cut-out image of the still image encoding target image do not overlap, it is not necessary to perform the subsequent steps because there is no overlapping region, The subsequent steps may be performed with the cut-out image area of the image encoding target image as an overlapping area.

  In the above example, the description has been made on the assumption that the encoding type of the moving image encoding process determined in step S204 is applied to the overlapping region. However, the encoding type of the moving image encoding process determined in step S204 is encoded. It may be applied to the entire image to be converted.

  As described above, according to the image encoding device 200 of the present embodiment, even when the still image encoding processing image and the moving image encoding processing region are different, the encoding target image of the moving image encoding processing is the same. Therefore, it is possible to suppress frame drop and image quality degradation due to an increase in the amount of generated codes during moving image coding.

(Embodiment 3)
FIG. 5 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 3 of the present invention. In this figure, the same components as those in FIG. 1 described above are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 5, the image coding apparatus 300 according to the present embodiment has the same configuration as the image coding apparatus 100 according to the first embodiment described above, and is similar to the attention area setting unit 301 and the coding control unit 106. In addition to having a function, the coding type and coding execution of the moving image coding process of the moving image coding unit 103 are controlled based on the coding information generated by the still image coding unit 104 according to the region of interest. And a coding control unit 302 having a function.

  The attention area setting unit 301 sets an attention area. In this case, as an example of setting as a region of interest, a region that is regarded as important as a monitoring target, such as an entrance or exit, or a region with a large movement in a captured image is known in advance. Further, as the contents to be set, an attention position, a size, a shape, or the like can be considered. In addition, the place set may be one place and may be multiple places. Also, a part or all of the attention area set in the moving image encoding unit 103 and the attention area set in the still image encoding unit 104 may be different. The encoding control unit 302 performs the video encoding process of the video encoding unit 103 based on the encoding information generated by the still image encoding unit 104 according to the target region set by the target region setting unit 301. Controls the encoding type and encoding execution.

  In FIG. 5, one moving image encoder 103 and one still image encoder 104 are shown, but there may be a plurality of each.

  The operation of the image coding apparatus 300 configured as described above will be described. 1 are denoted by the same reference numerals as those in FIG. 1 and description thereof is omitted.

  When the attention area is set by the attention area setting section 301, the encoding control section 302 encodes the encoding information (that is, DCT) generated by the still image encoding section 104 in accordance with the attention area set by the attention area setting section 301. Based on the calculation result, the encoding type and encoding execution of the moving image encoding process of the moving image encoding unit 103 are controlled.

  Subsequently, with reference to the flowchart of FIG. 6, a plurality of still image encoding processes have already been performed for the control of the moving image encoding process performed by the encoding control unit 302, and the attention area setting unit 301 determines the attention area. The case where it is set will be described below as an example.

  First, the attention area set by the attention area setting unit 301 is confirmed, and the processing from step S302 to step S304 is performed on the attention area (step S301). Acquires encoding information (that is, a DCT calculation result) generated by a still image encoding process performed on an image at a time close to the acquisition time of the current image that is a target image of the moving image encoding process, The encoding information (that is, the DCT calculation result) generated by the still image encoding process performed on the image at a time close to the acquisition time of the predicted reference image that is the target image of the image encoding process is acquired (step S302). ). Subsequently, the difference between the two DCT calculation results is calculated (step S303).

  Next, the coding type of the moving image coding process is determined from the difference result calculated in step S303 (step S304). The processing from step S301 to step S304 is performed on the entire encoding target image area (step S305). Next, the encoding type determined in step S304 is designated as the encoding type of the moving image encoding process, and execution of the moving image encoding process is instructed (step S306).

  Regarding the confirmation of the overlapping area performed in step S301, the size of the attention area of the moving image encoding target image is smaller than the attention area size of the still image encoding target image, and the attention of the still image encoding target image is reduced. If it is included in the region, it is conceivable that the attention region of the moving image encoding processing target image is set as the overlapping region.

  In addition, the attention area size of the moving image encoding target image is larger than the attention area size of the still image encoding target image, and the attention area of the still image encoding target image becomes the attention area of the moving image encoding target image. If it is included, the coding type determined in the overlapping region may be applied only to the overlapping region in the moving image encoding process target image, or may be applied to the entire moving image encoding process target image. It may be applied. In addition, when the attention area of the moving image encoding target image and the attention area of the still image encoding target image do not overlap, it is not necessary to perform the subsequent steps assuming that there is no overlapping area. The subsequent steps may be performed with the attention area of the encoding target image as an overlapping area.

  In the above example, the description has been made on the assumption that the encoding type of the moving image encoding process determined in step S304 is applied to the attention area. However, the encoding type of the moving image encoding process determined in step S304 is encoded. It may be applied to the entire image to be converted.

  As described above, according to the image encoding device 300 of the present embodiment, the change in the attention area of the image to be encoded in the moving image encoding process is estimated to control the encoding parameter of the moving image encoding process in the attention area. Therefore, it is possible to suppress frame dropping and image quality degradation due to an increase in the amount of generated codes during moving image encoding.

(Embodiment 4)
FIG. 7 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 4 of the present invention. In this figure, the same components as those in FIG. 1 described above are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 7, the image coding apparatus 400 according to the present embodiment has the same configuration as that of the image coding apparatus 100 according to the first embodiment described above, in addition to the coding information output from the still image coding unit 104. Still image encoding unit 401 for adding the generated code amount information at the time of still image encoding processing and quantization parameter information used at the time of still image encoding processing, and encoding information generated by still image encoding unit 401 A coding control unit 402 that adds a function for controlling the coding type and coding execution of the moving image coding process of the moving image coding unit 103 and the quantization parameter is provided.

  The still image encoding unit 401 inputs an image, performs still image encoding using DCT calculation processing, and stores encoded data and encoding information (DCT calculation result, generated code amount information, used quantization parameter information). Generate. The encoding control unit 402 controls the encoding type, encoding execution, and quantization parameter of the moving image encoding process of the moving image encoding unit 103 based on the encoding information generated by the still image encoding unit 401. .

  In FIG. 7, one moving image encoder 103 and one still image encoder 401 are shown, but there may be a plurality of each.

  The operation of the image coding apparatus 400 configured as described above will be described. 1 are denoted by the same reference numerals as those in FIG. 1 and description thereof is omitted.

  The still image encoding unit 401 encodes the input image as a still image, and generates quantization parameter information using the DCT calculation result and the generated code amount information as encoded data and encoding information. The encoding control unit 402 is based on the DCT calculation result generated by the still image encoding unit 401, the generated code amount information, and the quantization parameter information used, and the encoding type of the moving image encoding process of the moving image encoding unit 103. And control encoding and quantization parameters.

  Next, control of the moving image encoding process performed by the encoding control unit 402 will be described below using the flowchart of FIG. 2 that are the same as those in the flowchart of FIG. 2 are assigned the same reference numerals as those in FIG.

  After performing the processing of steps S101 to S103 described above, the encoding type determined in step S103 is confirmed (step S401). If it is determined to be inter-coding, execution of the moving image encoding process shown in step S104 is instructed, and if it is determined to be intra-encoding, it corresponds to the DCT calculation result used for determining the encoding type. Generated code amount information and quantization parameter information are acquired (step S402).

  Next, the generated code amount when the moving image encoding process is performed as the intra encoding is predicted (step S403). For the calculation of the prediction code amount, it is assumed that the same quantization parameter is used for the still image encoding process and the moving image encoding process with reference to the generated code amount at the time of still image encoding, and the compression efficiency is further considered. The method of calculating by this can be considered.

  Note that the compression efficiency may be based on the ratio of the entropy encoding efficiency used in each of the still image encoding process and the moving image encoding process. When the image size of the still image encoding process target image is different from the image size of the moving image encoding process target image, the prediction code amount is adjusted by the ratio of the image sizes.

  Next, the prediction code amount calculated in step S403 is compared with the threshold value of the code amount that can be generated by the moving image encoding process (step S404). In this case, the threshold used for comparison may be stored in advance in the encoding control unit 402 or may be set from the outside. If it is larger than the threshold value, the video encoding process is skipped, and if it is smaller than the threshold value, the quantization parameter is adjusted (step S405), and the execution of the video encoding process shown in step S104 is instructed. . Note that the quantization parameter may be adjusted based on the prediction code amount calculated in step S403 and the quantization parameter used during the still image encoding process.

  As described above, according to the image coding apparatus 400 of the present embodiment, when it is determined that the image change is large and the moving image coding target image is to be intra-coded, the code generated by the still image coding unit 401 is encoded. Controls the video encoding process by predicting the code amount generated in the video encoding process from the quantity information and the quantization parameter, thereby suppressing frame dropping and image quality degradation due to the increase in the generated code quantity during video encoding It becomes possible.

  Note that the image coding apparatuses according to Embodiments 1 to 4 are premised on transmitting encoded data generated by moving image encoding processing and still image encoding processing to the outside via a communication line. However, it may be configured to store in a recording medium inside or outside the encoding unit.

  Further, the image coding apparatuses according to Embodiments 1 to 4 have been described on the assumption that the plurality of image coding units are the moving image coding unit 103 and the still image coding unit 104. Even if both of the image encoding means are only the moving image encoding unit 103, the same applies when the moving image encoding unit that generates and outputs the encoded information is encoded as the intra encoding. An effect is obtained.

  The present invention controls encoding parameters of moving image encoding processing using encoding information generated by still image encoding processing when moving image encoding and still image encoding are performed in parallel. This is useful as an image encoding device used for surveillance cameras and the like.

FIG. 1 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 1 of the present invention. The flowchart for demonstrating operation | movement of the encoding control part which concerns on Embodiment 1 of this invention. FIG. 3 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 2 of the present invention. Flowchart for explaining the operation of the coding control unit according to the second embodiment of the present invention. FIG. 5 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 3 of the present invention. Flowchart for explaining the operation of the coding control unit according to the third embodiment of the present invention. FIG. 7 is a block diagram showing a schematic configuration of an image coding apparatus according to Embodiment 4 of the present invention. The flowchart for demonstrating operation | movement of the encoding control part which concerns on Embodiment 4 of this invention.

Explanation of symbols

100, 200, 300, 400 Image encoding device 101 Imaging unit 102 Image input unit 103 Moving image encoding unit 104, 401 Still image encoding unit 105 Transmission unit 106, 202, 302, 402 Encoding control unit 107 Communication line 201 Cutout part 301 Area of interest setting part

Claims (9)

A plurality of image encoding means for encoding an image to generate encoded data and encoding information;
Encoding of the encoding process performed by the other image encoding means based on the encoding information, using the image encoding result performed by at least one image encoding means among the plurality of image encoding means as the encoding information Encoding control means for controlling the parameters;
An image encoding device comprising: A plurality of image encoding means for encoding an image to generate encoded data and encoding information;
At least one of the plurality of image encoding means performs a discrete cosine transform calculation process as a part of the encoding process, and the result of the discrete cosine transform calculation process is used as the encoded information, and the encoded information is used as another code information. Encoding control means for controlling encoding parameters of encoding processing performed by the image encoding means;
An image encoding device comprising: A clipping means for cutting out part or all of an image is provided,
The image coding apparatus according to claim 1, wherein the coding control unit controls a coding parameter of a coding process performed by the image coding unit according to a cutout position of the image. An attention area setting means for setting an attention area in an image is provided,
The image coding apparatus according to claim 1, wherein the coding control unit controls a coding parameter of a coding process performed by the image coding unit according to a region of interest in the image. The encoding information includes generated code amount information generated during the image encoding process and quantization parameter information used during the image encoding process,
5. The encoding control unit according to claim 1, wherein the encoding control unit controls an encoding parameter of an encoding process performed by the image encoding unit according to the generated code amount information and the quantization parameter. Image encoding device.   At least one of a plurality of image encoding processes each performing image processing performs a discrete cosine transform calculation process as a part of the image encoding process, and uses the result of the discrete cosine transform calculation process as encoded information. An image encoding method for controlling an encoding parameter of another image encoding process according to information.   The image encoding method according to claim 6, wherein a part or all of an image is cut out and an encoding parameter of the other image encoding process is controlled according to a cut-out position.   The image encoding method according to claim 6, wherein an attention area in the image is set, and an encoding parameter of the other image encoding processing is controlled in accordance with the set attention area.   The encoded information includes generated code amount information generated at the time of the image encoding process and quantization parameter information used at the time of the image encoding process, and the other information is generated according to the generated code amount information and the quantization parameter. The image encoding method according to claim 6, wherein the encoding parameter of the image encoding process is controlled.

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