JPH11252544A - Moving image coder, its method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a moving image coder at a low cost where a coding efficiency and expansion performance are enhanced. SOLUTION: Since a header selection section 2 determines the presence or absence of header information to be added based on the position of an entered partial area in an original image, the overhead of a bit stream BS re- configuration section 32 is reduced. A border information discrimination section 14 outputs border information of a part of the BS and the BS re-configuration section 32 re-configures the BS based on the border information, so that decoding processing to detect the border is not required thereby reducing the overhead. Furthermore, an output right setting section 16 provides an output of the part of BS only when it has the output right and transfers sequentially the part of BS, and when an output of the series of the parts of BS is finished, the output right is sequentially transferred, thus a buffer storing the parts of BS is not required in the BS re-configuration section 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture coding apparatus and method for coding an original picture by space division or time division.

[0002]

2. Description of the Related Art In an apparatus for encoding a moving image in real time, when the original image to be encoded has a high definition, or it is necessary to perform a more accurate operation to increase the encoding efficiency. In some cases, for example, the required calculation amount becomes enormous, and it may not be possible to execute the processing with the processing capability of a single moving picture coding apparatus. In such a case, a plurality of arithmetic devices are operated in parallel to cope with an increase in the amount of arithmetic, and each arithmetic device
In many cases, a partial area of a space-divided or time-divided original image is encoded.

[0003] In this specification, an apparatus for encoding a partial area of an original image that has been spatially or temporally divided is called a unit encoding apparatus. Here, when the unit encoding device is configured by dedicated hardware, a general-purpose processor or a DSP (Digital Signal Process) is used.
ssor), it may be constituted by a combination of these.

FIG. 6 is a block diagram showing a configuration of a first conventional moving picture coding apparatus.
et al .: An HDTV Paralled Coding Method Ba
sedon Image Division., International Workshop
on HDTV '94, 8-A-1, Oct. 1994].

As shown in FIG. 1, the first conventional moving picture coding apparatus comprises a picture dividing section 10, unit coding apparatuses 71 to 74, and a bit stream reconstructing section 30. I have.

[0006] The input original image is divided by the image dividing unit 10, and each of the divided partial regions is input to the unit encoding devices 71 to 74, respectively. The moving picture coding apparatus of FIG. 6 illustrates an example in which an input original image is spatially divided.

Each of the unit encoders 71 to 74 encodes the input partial area based on an encoding algorithm.
A bit stream composed of header information and data following the header information is generated. Each unit encoding device 71-
Since the bit stream generated by 74 is the result of encoding a partial area of the original image, this signal will be referred to as a partial bit stream in this specification.

Each of the unit encoding devices 71 to 74 includes a header generation unit 1, a data generation unit 4, and a bit stream (BS) configuration unit 3, respectively.

[0009] The header generator 1 generates header information. The data generator 2 converts the partial area divided by the image divider into image data. The bit stream configuration unit 3 generates a partial bit stream based on the header information generated by the header generation unit 1 and the image data generated by the data generation unit 2.

The bit stream reconstructing section 30 temporarily converts the partial bit stream output from each of the unit encoding devices 71 to 74 into each FIFO (First In First).
Out: a first-in, first-out type memory 5, concatenates the partial bit streams in a predetermined order, and outputs a bit stream as a result of encoding the original image. In order for the bit stream reconstructing unit 30 to concatenate the partial bit streams in a predetermined order, it is necessary to appropriately control the order of reading data from each FIFO 5. For this,
The boundary between the partial bit streams stored in each FIFO 5 is analyzed by the bit stream analyzing unit 7, and based on the analysis result, the output from the FIFO 5 is read from the FIFO 5 so as not to violate the coding rules. The order is controlled by the FIFO control unit 6.

In the first conventional example, each of the partial regions of the original image which has been spatially divided is unit-encoded by a unit encoder 7 which operates independently.
1 to 74, and each of the unit encoding devices 71 to 74
It is characterized in that the bit stream output of the moving picture coding apparatus is obtained by directly bundling the partial bit streams output from 74. This configuration can use an existing system with low processing capacity as a unit encoding device,
There is an advantage that the moving picture coding device can be realized at relatively low cost. However, since each partial area is handled independently, the bit stream output from the video encoding device includes an unnecessary header and the like, and there is a disadvantage that the encoding efficiency is reduced by that amount.

For example, MPEG2 [ITU-T Recommendation H
-262] may be included only in the header information generated by the unit encoding device 71 that encodes the partial area A at the upper left corner of the original image, and may be included in other partial bit streams. Is redundant.

Next, a second conventional moving picture coding apparatus will be described with reference to FIG.

The second conventional moving picture coding apparatus is different from the first conventional moving picture coding apparatus in FIG. 6 in that the bit stream reconstructing section 30 is replaced by a bit stream reconstructing section 34.
Is replaced by

The bit stream reconstructing section 34 is provided for the bit stream reconstructing section 30 in FIG. 6 to delete unnecessary header information and the like in the partial bit streams output from the unit encoding devices 71 to 74. Is provided, and the FIFO control unit 6 and the bit stream analysis unit 7 are replaced with a FIFO control unit 76 and a bit stream analysis unit 77, respectively.

In the second conventional example, since the header information is deleted, there is a difference in the functions required of the bit stream analysis unit 77 and the FIFO control unit 76 as compared with the first conventional example. In the first conventional example, the bit stream is output without separating the header and the data in the partial bit stream while leaving the header information.
Is a requirement for the bit stream reconstruction unit 30 to prevent overflow of the
There was no restriction on the switching order of O5. However, when the header information is deleted when the bit stream is reconstructed as in the second conventional example, the switching order of the FIFOs 5 needs to be appropriately controlled.

FIG. 8 shows the processing contents of the bit stream reconstruction unit when the original image is divided into two partial areas. In this description, the moving picture coding apparatus includes a picture dividing unit 10, unit coding apparatuses 80A and 80B, and a bit stream reconstructing unit 35. Also,
The bit stream reconstruction unit 35 includes two FIFO5
, FIFO control unit 86 and bit stream analysis unit 8
7 is comprised.

In the moving picture coding apparatus, the bit stream for the original picture needs to be generated in the raster scan order.
0, B0, A1, B1,... The unit encoding device 80A writes the partial bitstreams generated in the order of A0, A1,... In the order of B0, B1,. When the boundary of A1 is detected, the FIFO control unit 86 starts reading from the FIFO5 storing B0, and when the bit stream analysis unit 87 detects the boundary of B0 and B1,
The O control unit 86 controls to start reading from the FIFO 5 in which A1 is stored.

In the second conventional example, similarly to the first conventional example, an existing system can be used as a unit encoding device.
In addition, since an unnecessary header or the like is not included in the bit stream output from the video encoding device, there is an advantage that a decrease in encoding efficiency can be prevented. However, in order to delete unnecessary headers in the bitstream reconstructing unit, it is necessary to analyze the bitstream obtained from the unit encoding device in detail, and an almost complete decoding device is required. For this reason, there is a disadvantage that the scale of the bit stream reconstruction unit becomes large. Further, it is necessary to change the bit stream reconstructing unit depending on how many unit encoding devices are used, and there is a disadvantage that the expandability of the video encoding device is poor.

[0020]

The above-described conventional moving picture coding apparatus has the following problems. (1) Outputting unnecessary headers by the unit coding apparatus causes a reduction in coding efficiency and increases overhead for reconstructing a bit stream. (2) Since the configuration of the bit stream reconstructing unit depends on the number of unit encoding devices at the preceding stage, the expandability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a moving picture coding apparatus which prevents a decrease in coding efficiency and is more expandable. is there.

[0022]

In order to achieve the above object, a moving picture coding apparatus according to the present invention comprises an image dividing unit for dividing an original picture, which is a moving picture, into a plurality of partial areas by spatially or temporally dividing the original picture. And a plurality of unit encoding devices each of which encodes each partial region divided by the image dividing unit and outputs it as a partial bit stream, and reconfigures each partial bit stream output from each unit encoding device. And a bit stream reconstructing unit that outputs the bit stream as a bit stream, wherein each of the unit coding apparatuses determines whether or not there is header information to be added to the generated partial bit stream by using an original image of the input partial area. It is characterized by having a header selecting means for determining according to the position in the inside.

According to the present invention, the header selecting means in each unit encoder determines whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial area in the original image. An unnecessary header is not included in each partial bit stream.

Therefore, the partial bit streams output from the unit encoding devices are simply connected without removing unnecessary headers in the bit stream reconstructing unit.
The bit stream can be reconstructed, and the overhead in the bit stream reconstructing unit can be reduced.

The moving picture coding apparatus according to the present invention further comprises: an image dividing section for dividing an original picture, which is a moving picture, into a plurality of partial areas by spatial or time division; A plurality of unit encoding devices that respectively encode regions and output as a partial bit stream, and a bit stream reconstructing unit that reconstructs each partial bit stream output from each of the unit encoding devices and outputs as a bit stream Wherein each of the unit encoding devices determines whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial region in the original image. And performs boundary detection between the input partial bitstreams, and uses information obtained by the boundary detection as bitstream boundary information. And a power boundary information detection means,
The bitstream reconstructing unit reconstructs each of the partial bitstreams using the bitstream boundary information.

According to the present invention, a unit encoding apparatus for generating a partial bit stream outputs information relating to a boundary position of a partial bit stream as bit stream boundary information. Reconstruction of each partial bit stream is performed based on information.

Therefore, the bit stream reconstructing unit does not need to decode each partial bit stream necessary for detecting the boundary of the partial bit stream, and can reduce overhead in the bit stream reconstructing unit.

Further, the moving picture coding apparatus of the present invention comprises: an image dividing section for dividing an original picture, which is a moving picture, into a plurality of partial areas by spatially or temporally dividing the original picture; A plurality of unit encoding devices that respectively encode regions and output as a partial bit stream, and a bit stream reconstructing unit that reconstructs each partial bit stream output from each of the unit encoding devices and outputs as a bit stream Wherein each of the unit encoding devices determines whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial region in the original image. And performs boundary detection between the input partial bitstreams, and uses information obtained by the boundary detection as bitstream boundary information. The output of the partial bit stream is granted when the output right of the partial bit stream is transferred from another unit encoding device, and the output of the partial bit stream is performed. When detecting that the output of the partial bit stream of the encoding target area to be continuously output from the reconstructing unit is completed, the output of the partial bit stream is stopped and the image area following the output right is encoded. Output right setting means for transferring to the unit encoding device.

According to the present invention, each unit encoder outputs a partial bit stream only when the output right of the partial bit stream is given, and the encoding target to be continuously output from the bit stream reconstructing unit. When the output of the partial bit stream of the area is completed, the output right is transferred to the next unit encoding device.

Therefore, since there is always one unit encoding device that outputs a partial bit stream at a certain time, the bit stream reconstructing unit holds the partial bit stream output from each unit encoding device. It is not necessary to have a buffer storage means for the operation.

According to an embodiment of the present invention, the boundary information detecting means includes a generated data amount counting means for counting an amount of data generated by the partial bit stream, and a partial data amount to be continuously output. Data amount storage means for storing the final value of the generated data amount count means for each stream; output data amount count means for counting the amount of data output to the bit stream reconstruction unit; By comparing the count value in the amount counting unit with the value stored at the head of the data amount storage unit, the partial bit stream of the encoding target region being output and the partial bit stream of the other encoding target region are output. And outputs information obtained by the boundary detection as the partial bit stream boundary information. And a boundary determination unit.

[0032]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a moving image encoding device according to an embodiment. The same numbers as those in FIG. 6 indicate the same components.

The moving picture coding apparatus according to the present embodiment differs from the first conventional moving picture coding apparatus shown in FIG. 6 in that the unit coding apparatuses 71 to 74 are replaced with unit coding apparatuses 21 to 24. is there.

The unit coding units 21 to 24 are different from the unit coding units 71 to 74 in FIG.
A header selection unit 2 is provided between the header selection unit 3 and the bit stream configuration unit 3.

The header selection unit 2 selects only necessary headers from the headers generated by the header generation unit 1 and outputs the selected headers to the bit stream construction unit 3. In FIG. 1, the header selection unit 2 outputs only the header provided at the head of the picture to the bit stream configuration unit 3.

Next, the operation of the moving picture coding apparatus according to this embodiment will be described with reference to FIG.

The unit encoding devices 21 to 24 of the present embodiment
Selects whether the header information generated by the header generation unit 1 is to be added to the data generated by the data generation unit 4 by the header selection unit 2, and only the necessary header information to be added to the data is selected. Be included in the partial bit stream. The header information selected by the header selection unit 2 can be changed for each of the unit encoding devices 21 to 24, and FIG. 1 shows an example in which the header information is added only by the unit encoding device 21. .

The bit stream reconstructing unit 30 analyzes the partial bit stream output from each of the unit encoding devices 21 to 24 and counts the number of slice headers. A partial bit stream for one frame can be extracted from the output partial bit stream. This means that a partial bit stream for one frame output from each of the unit encoding devices 21 to 24 starts from header information and ends with slice data following the same number of slice headers as the number of slices included in the partial area. This is because it is specified by the chemical standard. The bit stream reconstruction unit 30
By connecting the extracted partial bit streams for one frame in a predetermined order, a bit stream for the original image can be output.

In the present embodiment, the header selection section 2 selects and outputs only the header provided at the head of the picture. However, the present invention is not limited to this, and the header selection section 2 is not limited to this. If the header information added to the partial bit stream to be generated is changed according to the position in the original image, various image data can be handled.

(Second Embodiment) Next, a moving picture coding apparatus according to a second embodiment of the present invention will be described.

In the first embodiment, since each of the unit encoding devices 21 to 24 continuously outputs a partial bit stream, the bit stream reconstruction unit 30 needs to analyze the partial bit stream. This analysis is actually a decoding process, which is essentially unnecessary for the moving picture coding apparatus, and becomes an overhead in the system configuration. The present embodiment aims at reducing this overhead.

FIG. 2 is a block diagram showing a configuration of a moving picture coding apparatus according to a second embodiment of the present invention. The same numbers as those in FIG. 1 indicate the same components.

In this embodiment, the image dividing unit 10, the unit encoding devices 41 to 44, and the bit stream reconstructing unit 31
It is composed of

The unit encoding devices 41 to 41 in the present embodiment
44 is a unit encoding device 21 to 21 according to the first embodiment.
24 is obtained by adding a boundary information detection unit 11 for detecting boundary information between partial bit streams.

The boundary information detecting section 11 includes a generated data amount counter 12, a data amount FIFO 13,
And an output data amount counter 15.

The generated data amount counter 12 counts the amount of data in which a partial bit stream is generated in the bit stream forming unit 3.

The data amount FIFO 13 stores the final value of the generated data amount counter 12 for each partial bit stream to be continuously output.

The output data amount counter 15 counts the amount of data output from the bit stream construction unit 3 to the bit stream reconstruction unit 31.

The boundary judging section 14 calculates the value counted by the output data amount counter 15 and the data amount FIFO 13
By comparing the partial bitstream of the encoding target area that is currently being output with the partial bitstream of the other encoding target area by comparing the value stored at the beginning of the It is output as partial bit stream boundary information.

Further, the bit stream reconstruction unit 31
It comprises a FIFO control unit 36 and four FIFOs 5.

The FIFO control unit 36 controls the bits transmitted from each of the unit encoding units 41 to 44 so that the partial bit streams stored in each FIFO 5 are connected in an appropriate order to generate a bit stream. The reading order of the FIFO 5 is controlled based on the stream boundary information.

Next, the operation of this embodiment will be described with reference to FIG.

Each time the unit encoders 41 to 44 complete the generation of a partial bit stream to be continuously output from the bit stream reconstructing unit 31, the generated data amount counter 12 writes the counter value to the data amount FIFO 13. . The output data amount counter 15 counts the amount of output data from the bit stream composing unit 3 to the bit stream reconstructing unit 31. Then, the boundary determination unit 14
Then, by comparing the value counted by the output data amount counting unit 15 with the value stored at the head of the data amount FIFO 13, the partial bit stream of the encoding target area that is being output at that time and another code The boundary between the segmentation target area and the partial bit stream is determined, and the result is output as partial bit stream boundary information.

Then, the bit stream reconstruction unit 31
Controls the reading order of the FIFO 5 based on the bit stream boundary information sent from each of the unit encoding devices 41 to 44, and can output a bit stream in which partial bit streams are connected in an appropriate order.

For example, based on the bit stream boundary information, the data amount of the partial bit stream stored in the FIFO 5 is monitored and compared with the data amount read from the FIFO 5, thereby switching the FIFO 5 from which data is read. The control method and bit stream boundary information
By writing directly to the FO5, a control method for switching the FIFO5 from which data is to be read when bitstream boundary information is output from the FIFO5 can be considered.

In this embodiment, the unit encoding devices 41 to 4
There is no need to analyze the partial bit stream output from 4 in the bit stream reconstruction unit 31. The boundary information detection unit 11 added to the unit encoding devices 41 to 44 includes two counters, a generated data amount counter 12 and an output data amount counter 15, and a data amount FIF.
O13 can be constituted by only one FIFO, and the control timing of these counters and FIFO is an indispensable timing for controlling the encoding process of “end of partial bit stream”. Can be added without complication.

(Third Embodiment) Next, a moving picture coding apparatus according to a third embodiment of the present invention will be described.

In the second embodiment, since each of the unit encoding devices 41 to 44 outputs a partial bit stream at the same time, the bit stream reconstructing unit 31 performs a process for connecting the partial bit streams in a predetermined order. It was necessary to provide a plurality of FIFOs 5 as buffers. The present embodiment aims at simplifying or eliminating the need for a bit stream reconstructing unit by eliminating this buffer.

FIG. 3 is a block diagram showing the configuration of the moving picture coding apparatus according to the third embodiment of the present invention. The same numbers as those in FIG. 2 indicate the same components.

In the present embodiment, the image dividing unit 10, the unit encoding devices 51 to 54, and the bit stream reconstructing unit 32
It is composed of

The unit encoders 51 to 54 are respectively provided with an output right setting unit 16 and a switch 17 for the unit encoders 41 to 44 of FIG.

When the output right setting unit 16 receives the output right of the partial bit stream from another output right setting unit, the output right setting unit 16 activates the output permission signal 19, and based on the bit stream boundary information output from the boundary determination unit 14, When it is detected that the output of the partial bit stream of the encoding target area to be continuously output from the bit stream reconstructing unit 32 has been completed, the output permission signal 19 is made inactive and the image area following the output right is encoded. To the next unit encoding device to be converted.

The switch 17 outputs the partial bit stream output from the bit stream forming unit 3 to the bit stream reconfiguring unit 32 only when the output permission signal 19 output from the output right setting unit 16 is active.

The output right setting unit 16 is set so that only one unit coding device among the devices has the right to output a partial bit stream when the moving picture coding device is initialized.
Usually, the unit encoding device that has the partial bitstream output right after the initialization is the one that encodes the partial region at the upper left corner of the original image.

The bit stream reconstruction unit 32
A FIFO is used for the bit stream reconstruction unit 31 in FIG.
The unit 5 and the FIFO control unit 36 are deleted, and the partial bit streams output from the unit encoding devices 51 to 54 are simply combined and output as a bit stream.

FIG. 4 shows the bit stream output timing in this embodiment. Referring to FIG. 4, it can be seen that each of the unit encoding devices 51 to 54 outputs a partial bit stream in order with the transfer of the output right.

Further, as shown in FIG.
When 1 to 54 encode the partial area of the original image divided in the horizontal direction, the transfer of the output right of the partial bit stream is performed to the unit encoding device that encodes the partial area immediately below the original image. Will be transferred. Also, as shown in FIG. 3, a unit coding device 54 for coding the lowermost partial region in the original image.
Unit encoding device 51 for encoding the uppermost partial region from
Is provided, and the transfer of the partial bit stream output right is circulated, so that in response to the partial bit stream output request from the bit stream reconstructing unit 32, the output from the unit encoding devices 51 to 54 is performed. The partial bit stream to be converted becomes a reconstructed bit stream as it is. Thereby, the function required for the bit stream reconstruction is almost eliminated, and in the hardware configuration, the bit stream reconstruction unit 32 connects the partial bit stream outputs from the unit encoding devices 51 to 54 by a path connection. Completely unnecessary. Also, in order to cope with a change in the required operation amount, it is possible to cope only by changing the number of unit encoding devices connected in a ring shape, and it is possible to flexibly cope with a change in the required operation amount. In addition, the expandability of the moving picture coding apparatus increases.

(Fourth Embodiment) FIG. 5 shows a fourth embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a moving image encoding device according to an embodiment.

In the first to third embodiments, the case where the original image is spatially divided is described. In the present embodiment, the case where the original image is time-divided in frame units.

A moving image is composed of still images called temporally continuous frames. The video coding standard includes a bit stream layer (picture layer) including header information for a frame, a plurality of consecutive frames (GOP: GroupOf Pictures).
Bit stream layer containing the header information for
P layer) and a bit stream hierarchy (sequence layer) including header information for a plurality of GOPs are defined.

In the process of distributing the original image to the unit encoding device in the image dividing unit, the encoding process is performed by distributing the frames or GOPs corresponding to these bit stream layers to each unit encoding device as a partial area. Distributed processing can be performed.

In the present embodiment, the image dividing unit 10 is replaced with an image dividing unit 40 in the moving picture coding apparatus according to the third embodiment shown in FIG. The image dividing section 40 divides the original image in time and outputs each as a partial area.

In the present embodiment, the partial area sent from the image dividing unit to each unit encoding device is frame unit, and the header information selected and sorted by the header selecting unit 2 of each unit encoding device 51-54. There is no difference from the configuration of the first embodiment, the second embodiment, and the third embodiment except that is different. Similarly, the unit encoding device 51
The configuration in which the time division and the space division are performed simultaneously when dividing the image into ５４ to 54 is also performed,
This can be realized by appropriately changing the header information that is selected by the header selection unit 2 of each of the unit encoding devices 51 to 54.

As described above, according to the moving picture coding apparatus of the present embodiment, the unit coding apparatus constituting the moving picture coding apparatus generates only a necessary part of the partial bit stream. When performing bitstream reconstruction, it is not necessary to analyze the partial bitstreams output from each unit encoding device, and simply connect each partial bitstream in a predetermined order to obtain a desired bitstream. Can be. Also, if the original image is appropriately spatially divided and processed by the unit encoding device, the bit stream reconstruction can be performed by cooperatively operating the unit encoding devices, and does not depend on the number of unit encoding devices. Because of the configuration, the expandability of the encoding device is excellent. The unit coding device necessary for these uses the functions of the existing device capable of coding a moving image with a low resolution, and thus can be realized only by adding a relatively small number of functions.

[0076]

As described above, the moving picture coding apparatus according to the present invention can increase the coding efficiency and expandability in the space or time division processing of the original picture and reduce the cost. It has the effect that can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a video encoding device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a video encoding device according to a second embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a video encoding device according to a third embodiment of the present invention.

FIG. 4 is a timing chart for explaining the operation of the video encoding device of FIG. 3;

FIG. 5 is a block diagram illustrating a configuration of a video encoding device according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a first conventional moving picture coding apparatus.

FIG. 7 is a block diagram showing a configuration of a second conventional moving picture encoding device.

FIG. 8 is a diagram for explaining bit stream reconstruction.

[Description of Signs] 1 Header generation unit 2 Header selection unit 3 Bit stream (BS) configuration unit 4 Data generation unit 5 FIFO 6 FIFO control unit 7 Bit stream (BS) analysis unit 10 Image division unit 11 Boundary information detection unit 12 Generation Data amount counter 13 Data amount FIFO 14 Boundary judging unit 15 Output data amount counter 19 Header deleting unit 21 to 24 Unit encoder 30 to 35 Bit stream reconstructor 36 FIFO controller 41 to 44 Unit encoder 51 to 54 Unit Encoding devices 61 to 64 Unit encoding devices 71 to 74 Unit encoding devices 80A, 80B Unit encoding devices 86 FIFO control unit 87 Bit stream (BS) analysis unit

Claims (10)

[Claims] An image dividing unit that divides an original image as a moving image into a plurality of partial regions by spatially or temporally dividing the original image, and encodes each of the partial regions divided by the image dividing unit into a partial bit stream. A plurality of unit encoding devices for outputting, and a moving image encoding device having a bit stream reconstructing unit for reconstructing each partial bit stream output from each of the unit encoding devices and outputting as a bit stream, Each of the unit encoding apparatuses has a header selecting unit that determines whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial area in the original image. Device. 2. An image dividing unit that divides an original image as a moving image into a plurality of partial regions by spatially or temporally dividing the original image, and encodes each of the partial regions divided by the image dividing unit into a partial bit stream. A plurality of unit encoding devices for outputting, and a moving image encoding device having a bit stream reconstructing unit for reconstructing each partial bit stream output from each of the unit encoding devices and outputting as a bit stream, Each unit encoding device includes: header selection means for determining whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial area in the original image; and a boundary between the input partial bit streams. Perform detection,
And boundary information detecting means for outputting information obtained by the boundary detection as bit stream boundary information, wherein the bit stream reconstructing unit reconstructs each of the partial bit streams using the bit stream boundary information. A moving picture coding apparatus characterized by performing the above. 3. An image dividing unit which divides an original image which is a moving image into a plurality of partial regions by spatially or temporally dividing the original image, and encodes each of the partial regions divided by the image dividing unit into a partial bit stream. A plurality of unit encoding devices for outputting, and a moving image encoding device having a bit stream reconstructing unit for reconstructing each partial bit stream output from each of the unit encoding devices and outputting as a bit stream, Each unit encoding device includes: header selection means for determining whether or not there is header information to be added to the generated partial bit stream according to the position of the input partial area in the original image; and a boundary between the input partial bit streams. Perform detection,
A boundary information detecting means for outputting information obtained by the boundary detection as bit stream boundary information; and performing output permission of the generated partial bit stream when the output right of the partial bit stream is transferred from another unit encoding device. Detecting that the output of the partial bit stream of the encoding target area to be continuously output from the bit stream reconstructing unit is completed by inputting the bit stream boundary information, the output of the partial bit stream is stopped. And an output right setting unit for transferring the output right to another unit coding device that encodes a subsequent image area. 4. A method according to claim 1, wherein said boundary information detecting means includes: a generated data amount counting means for counting an amount of data generated by the partial bit stream; and a generated data amount counting means for each partial bit stream to be continuously output Data amount storage means for storing the final value of the data, output data amount counting means for counting the amount of data output to the bit stream reconstructing unit, count value in the output data amount counting means and the data By comparing the value stored at the head of the quantity storage means with the partial bit stream of the encoding target area being output and the partial bit stream of the other encoding target area, the boundary detection is performed. And a boundary determination unit that outputs the information obtained by the partial bit stream boundary information. Moving picture encoding apparatus according to claim 2 or 3, wherein that. 5. An original image, which is a moving image, is divided into a plurality of partial regions by space division or time division, and each of the partial regions is encoded and output as a plurality of partial bit streams. In the moving picture encoding method configured and output as a bit stream, when each of the partial regions is encoded and output as a plurality of partial bit streams, presence or absence of header information to be added to the generated partial bit stream is input. A moving picture coding method characterized in that it is determined according to the position of a partial area in an original picture. 6. An original image, which is a moving image, is divided into a plurality of partial regions by space division or time division, and each of the partial regions is encoded and output as a plurality of partial bit streams. In the moving picture encoding method configured and output as a bit stream, when each of the partial regions is encoded and output as a plurality of partial bit streams, presence or absence of header information to be added to the generated partial bit stream is input. Determined according to the position of the partial area in the original image, and perform boundary detection between the input partial bitstreams, and output information obtained by the boundary detection as bitstream boundary information. Is reconstructed and output as a bit stream, the bit stream boundary information Moving picture coding method and performing reconstruction of the respective partial bit stream using. 7. A partial image is divided into a plurality of partial regions by spatially or temporally dividing an original image as a moving image, and each of the partial regions is encoded and output as a plurality of partial bit streams. In the moving picture encoding method configured and output as a bit stream, when each of the partial areas is encoded and output as a plurality of partial bit streams, a portion where presence or absence of header information to be added to the generated partial bit stream is input The region is determined according to the position of the region in the original image, the boundary between the input partial bit streams is detected, and information obtained by the boundary detection is used as bit stream boundary information. When the process of encoding one partial area and outputting it as a partial bit stream is completed, Starts the process of encoding and outputting a partial bit stream, and by inputting the bit stream boundary information, the output of the partial bit stream of the encoding target region to be continuously output from the bit stream reconstructing unit is performed. A moving picture coding method, comprising: upon completion of the processing, ending the processing and starting a process of coding a next partial area for coding a subsequent image area and outputting the resultant as a partial bit stream. 8. A process of spatially or temporally dividing an original image as a moving image into a plurality of partial regions, a process of encoding each of the partial regions and outputting a plurality of partial bit streams, A process of reconstructing a partial bit stream and outputting the same as a bit stream, and a recording medium recording a moving image encoding program for execution, the process of encoding each of the partial regions and outputting the plurality of partial regions as a plurality of partial bit streams In this case, a moving image encoding program is recorded, wherein the presence or absence of header information to be added to the generated partial bit stream is determined according to the position of the input partial area in the original image. recoding media. 9. A process of spatially or temporally dividing an original image as a moving image into a plurality of partial regions, a process of encoding each of the partial regions and outputting a plurality of partial bit streams, And a process of reconstructing a partial bit stream and outputting the same as a bit stream on a recording medium on which a moving image encoding program is recorded. Is performed, the presence or absence of header information to be added to the generated partial bit stream is determined according to the position of the input partial area in the original image, and the boundary between the input partial bit streams is detected. Outputting information obtained by the boundary detection as bit stream boundary information; When performing a process of reconstructing a stream and outputting it as a bit stream, a moving image encoding program characterized by executing a process of reconstructing each of the partial bit streams using the bit stream boundary information. The recording medium on which it was recorded. 10. A process of dividing an original image as a moving image into a plurality of partial regions by performing space division or time division, encoding each of the partial regions and outputting a plurality of partial bit streams, And a process of reconstructing a partial bit stream and outputting the same as a bit stream on a recording medium on which a moving image encoding program is recorded. Is performed, the presence or absence of header information to be added to the generated partial bit stream is determined according to the position of the input partial area in the original image, and a boundary between the input partial bit streams is detected. Processing for obtaining information obtained by the detection as bit stream boundary information; When the process of encoding the partial region and outputting it as a partial bit stream ends, the process of encoding the other partial region and outputting it as a partial bit stream is started, and by inputting the bit stream boundary information, When it is detected that the output of the partial bit stream of the encoding target area to be continuously output from the reconstructing unit is completed, the processing is terminated and the next partial area for encoding the subsequent image area is encoded. A recording medium on which a moving image encoding program is recorded, the recording medium performing a process of starting output of a bit stream.