JP2001103427A - Compressed image reproducing apparatus and program recording medium - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a compressed image reproducing apparatus capable of greatly saving a memory required for reverse reproduction. A compressed data reading section reads compressed image data from a head of a compressed image group to a display image specified by a reverse reproduction control means from a hard disk.
The image is decoded by the image decoding unit 3. Only the designated image among the decoded images is output to the image display means 4 and displayed. Until the data in the compressed image group has been reversely reproduced, the reverse reproduction control means 5 performs the same processing by specifying an image whose display order is smaller by one or more than the displayed image every time one image is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed image reproducing apparatus and a program recording medium capable of performing reverse reproduction such as reverse reproduction or reverse frame feed of a compression-encoded image recorded on a recording medium.

[0002]

2. Description of the Related Art In recent years, a personal computer application using compression coding using an intra-frame coded image and an inter-frame coded image based on the MPEG, H263 standard or the like has been commercialized. A function of reproduction and reverse frame feed is required.

[0003] A conventional compressed image reproducing apparatus will be described below.

[0004] A conventional reverse reproduction method will be described using a conventional apparatus for reproducing compressed image data recorded on a recording medium such as a hard disk as a conventional compressed image reproducing apparatus.

FIG. 5 is a block diagram of a conventional compressed image reproducing apparatus.

In FIG. 5, compressed image data of the H263 standard is recorded on a hard disk 1 as a recording medium. The compressed image group reading means 50 is means for reading compressed image data from the hard disk 1 from the head of the compressed image group.

The compressed image decoding means 53 decodes the compressed image data based on the H263 standard and outputs a decoded image. The decoded image storing frame memory 51 decodes the compressed image data for use in reverse reproduction. 1 decrypted by means 3
This is a frame memory that holds decoded images for the compressed image group.

The frame memory reading means 52 reads out an image to be displayed from the decoded image storing frame memory 51 and outputs the image to be displayed in accordance with the display order specified by the reverse reproduction control means 55. The means 4 is means for displaying the decoded image output from the frame memory reading means 52 at a predetermined frame rate.

The reverse reproduction control means 55 controls a series of operations of the compressed image group reading means 52, the compressed image decoding means 53, and the frame memory reading means 52 for performing reverse reproduction.

The reverse playback operation will be described below by taking a part of the video compressed image data as shown in FIG. 6 as an example.

In FIG. 6, I indicates an intra-coded image, and P indicates an inter-coded image. The numbers attached to I and P indicate the display order added to the compressed image. The notation of the image type and the display order is the same in other drawings. Here, a single intra-coded image, and one or more inter-coded images between the intra-coded image and the next intra-coded image are defined as a compressed image group. .

First, in the case of normal reproduction, images are input in the order of the compressed image group 1, the compressed image group 2, and the compressed image group 3, and are reproduced in the order of small display order. In the reverse reproduction, the compressed image group reading unit 50 reads out the compressed image group 3, the compressed image group 2, and the compressed image group 1 in this order, and as shown in FIG. Are displayed in the order of.

Since the same processing procedure is used for each compressed image group, the operation up to the point where an image is displayed in reverse reproduction will be described using the compressed image group 2 as an example.

In the compressed image reproducing apparatus configured as described above, reverse reproduction control is performed by the reverse reproduction control means 55, and the compressed image group 2 is read from the hard disk 1 by the compressed image group reading means 50. The read compressed image group 2 is decoded by the compressed image decoding means 53, and all decoded images are output. All the decoded images of the compressed image group 2 are stored in the decoded image storage frame memory 51.

Then, in accordance with the display order instruction from the reverse reproduction control means 55, the decoded images in the decoded image storage frame memory 51 are read out by the frame memory reading means 52 in order from the decoded image having the larger display order to the decoded image having the smaller display order. The decoded image is output to the image display means 4, where the decoded image is displayed at a predetermined frame rate. After the processing of the compressed image group 2 is completed, next, the same processing is performed on the compressed image group 1, and such processing is repeated for each compressed image group, thereby realizing reverse reproduction.

[0016]

However, in the above-described conventional configuration, all the decoded images are stored in the frame memory for each compressed image group in order to perform reverse reproduction, so that a very large frame memory is required. There was a problem that it was necessary.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a compressed image reproducing apparatus and a program recording medium which can largely save a frame memory required for performing reverse reproduction. And

[0018]

Means for Solving the Problems The first invention (claim 1)
Corresponding to the described invention) is a compressed image of an arbitrary intra-coded image and one or more inter-frame encoded images between the intra-coded image and the next intra-coded image. A group is displayed, and a display order code indicating a display order is added to each encoded image, and the compressed image data that has been compressed and encoded using both the intra-frame encoded image and the inter-frame encoded image is read out from the recording medium. A compressed image reproducing apparatus that performs reverse reproduction such as reverse reproduction or reverse frame feed based on the compressed image data to be processed, and based on a predetermined instruction, compresses compressed image data in a compressed image group from at least the recording medium. A compressed data reading unit that reads and outputs the decoded image included in the compressed image data output from the compressed data reading unit,
An image decoding unit that outputs only the decoded images in the display order specified in the compressed image group, an image display unit that displays the decoded image output from the image decoding unit, and the decoded image that is displayed by the image display unit. Every time is displayed, the display order of the decoded image output to the image display means is changed by one.
The compressed image data including the encoded image up to the designated display order from the beginning of the compressed image group to the compressed data readout unit. And a reverse reproduction control means for instructing to read the compressed image.

With this configuration, for example, reverse reproduction can be performed without a frame memory for storing a decoded image.

According to a second aspect of the present invention (corresponding to the second aspect of the present invention), the compressed data reading section is configured to perform the compression based on the designation and / or the instruction from the reverse reproduction control means. Compressed image data control means for performing control relating to reading and saving of image data, and compressed image data reading means for reading and outputting the compressed image data from the recording medium based on an instruction from the compressed image data control means, Compressed image data storage means for temporarily storing the compressed image data read from the compressed image data reading means, and outputting the temporarily stored compressed image data in response to a read instruction from the compressed image data control means. Wherein the compressed image data control means comprises:
Based on the designation and / or the instruction from the reverse playback control unit, the compressed image data from the compressed image data reading unit is used, or the compressed image data stored in the compressed image data storage unit is The compressed image reproducing device according to the first aspect of the present invention determines whether to use the compressed image reproducing device.

With this configuration, for example,
Since it is not necessary to read the same compressed image data again and again from the recording medium, the data reading speed can be improved.

A third aspect of the present invention (corresponding to the third aspect of the present invention) relates to a method for coding an arbitrary intra-frame coded image between the intra-frame coded image and the next intra-frame coded image. , One or more inter-frame coded images as a compressed image group, and a display order code indicating a display order is added to each coded image to compress both intra-frame coded images and inter-frame coded images. Based on the compressed image data read from the recording medium on which the encoded compressed image data is recorded, a compressed image playback device that performs reverse playback such as reverse playback or reverse frame feed, based on a predetermined instruction, A compressed data reading unit that reads and outputs at least the compressed image data in the compressed image group from the recording medium; and a compressed data read unit that is included in the compressed image data output from the compressed data read unit. Compressed image decoding means for decoding an encoded image and outputting only a decoded image in a display order designated in the compressed image group, and decoding of a part of the compressed image group decoded by the compressed image decoding means Image storing means for temporarily storing an image, image display means for displaying the decoded image output from the compressed image decoding means, and image display means each time the decoded image is displayed on the image display means. The compressed image decoding unit performs the designation of a display order one or more smaller than the display order of the decoded image output to the compressed image reading unit, and further causes the compressed data reading unit to execute the designation from the predetermined display order of the compressed image group. Reverse playback control means for instructing to read out the compressed image data including the encoded image up to the displayed display order. It is a device.

According to a fourth aspect of the present invention (corresponding to the fourth aspect of the present invention), the compressed image decoding means includes: (1) the display order specified by the reverse reproduction control means is the intermediate image storage; When the display order of the decoded images temporarily stored in the means is larger than the display order of the temporarily stored decoded images, the designated display is performed from the display order of the temporarily stored decoded images using the temporarily stored decoded images. (2) If the display order specified by the reverse reproduction control means is the same as the display order of the decoded images temporarily stored in the intermediate image storage means, the decoding is performed. The compressed image reproducing device according to the third aspect of the present invention outputs the stored decoded image to the image display means.

With such a configuration, for example, it is not necessary to perform decoding from the head of the compressed image group every time, so that the amount of decoding processing can be reduced.

According to a fifth aspect of the present invention (corresponding to the fifth aspect of the present invention), the compressed image decoding means based on an analysis result of the compressed image data read from the compressed data reading section. The compressed image reproducing apparatus according to the third aspect of the present invention, further comprising an extracted image determining means for determining the decoded image to be temporarily stored so that the amount of decoding processing is minimized.

With this configuration, it is possible to determine an optimal intermediate image for each compression group, for example, in accordance with the data structure of each compression image group.

According to a sixth aspect of the present invention (corresponding to the sixth aspect of the present invention), all or some of the functions of all or some of the first to fifth aspects of the present invention are implemented by a computer. Is a program recording medium on which a program to be executed is recorded.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a compressed image reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, compressed image data of the H263 standard is recorded on a hard disk 1 as a recording medium. The compressed data reading unit 2 reads out predetermined compressed image data in the compressed image group specified by the reverse reproduction control unit 5 from the hard disk 1 and outputs the data. The image decoding unit 3 decodes the compressed image data based on the H263 standard. Only the decoded images in the display order specified by the reverse reproduction control means 5 are output to the image display means 5.

The image display means 4 is a means for displaying the decoded image output from the image decoding section 3 at a predetermined frame rate. Further, the reverse reproduction control means 5 is a means for controlling a series of operations for performing reverse reproduction.

The operation of the above-configured compressed image reproducing apparatus according to this embodiment will be described below.

Since the processing for each compressed image group is the same, the processing operation of the compressed image group 2 in FIG.

As shown in FIG. 7, all the decoded images of the compressed image group 2 are arranged in order from the image having the larger display order to the image having the smaller display order, that is, P5, P4, P
Until the display is completed in the order of 3, P2, P1, I0, every time one decoded image is displayed, the compressed image data from the head of the compressed image group 2 to the next image to be displayed is read again and decoded to the display image. And repeat the operation of displaying.

Referring to FIG. 7, first, P5
In order to display, the reverse reproduction control means 5 sends a read instruction to the compressed data read unit 2 to read from the head I0 to P5 of the compressed image group 2, and designates the image P5 to be displayed to the image decoding unit 3.

The compressed data reading unit 2 reads all the compressed image data of the compressed image group 2, that is, from I 0 to P 5, under the control of the reverse reproduction control means 5.
Is read from. The read compressed image group 2 is decoded by the image decoding unit 3 up to P5 which is the last image of the compressed image group 2, and P5 is output to the image display means.

At this time, the decoded images from I0 to P4 decoded up to P5 are not output from the image decoding unit 3 to the outside. The outputted P5 is displayed as an image by the image display means 4.

Next, in order to display P4, the reverse reproduction control means 5 sends a read instruction to the compressed data read section 2 to read from the head I0 to P4 of the compressed image group 2, similarly to the processing of P5. The image P4 to be displayed is specified to the image decoding unit 3.

Again, I0 to P4 are read from the hard disk 1 by the compressed data reading unit 2 and decoded, and P4 is output to the image display means 4 and displayed.

By repeating such a process up to I0 at the head of the compressed image group 2, the decoded images can be displayed in order from the image having the larger display order to the image having the smaller display order.
Reverse playback can be realized. When the display of the compressed image group 2 is completed, the same processing as that of the compressed image group 2 is performed on the compressed image group 1 so that reverse reproduction can be performed.

As described above, according to the present embodiment, every time one decoded image is displayed, the compressed image data from the head of the compressed image group to the image to be displayed next is read out, and the first compressed image data is read. Since the display image is obtained by decoding in order from the image data, reverse reproduction can be performed without a frame memory for storing the decoded image as in the conventional example.

As a modification of the above embodiment, the compressed data reading section 2 may be configured as shown in the block diagram of FIG.

That is, in FIG. 2, the compressed image data storage means 23 is means for temporarily storing the compressed image data.
The compressed image data switching means 21 receives the input from the compressed image data reading means 20 and the compressed image data control means 22.
This is means for switching the input of the compressed image data stored in the compressed image data storage means 23 read out via the compressed image data control means 22 and outputting it.

The compressed image data control means 22 stores the compressed image data read by the compressed image group reading means 20 in the compressed image data storage means 23 in response to a read instruction from the reverse reproduction control means 5, and further compresses the compressed image data. This is a means for reading out the compressed image data temporarily stored in the image data storage means 23 and outputting it to the compressed image data switching means 21.

In the configuration of FIG. 1, the same compressed image group 2 is transferred from the hard disk 1 to perform reverse reproduction as shown in FIG.
Was read many times from the beginning.

On the other hand, according to the above-described modification,
By configuring the compressed data reading unit 2 as shown in FIG. 2, the compressed image data control unit 22 stores the data of the compressed image group 2 read first in the compressed image data storage unit 21.

When the data of the compressed image group 2 is read out for the second time or later, the data is read out from the compressed image data storage means 21 via the compressed image data control means 22 and output to the compressed image data switching means 21.

At this time, the compressed image data switching means 21 is switched to the input from the compressed image data storage means 23 by the compressed image data control means 22. The compressed image group 2 is read from the compressed image data storage unit 23 until all the decoded images of the compressed image group 2 have been reproduced in reverse. When the reverse reproduction of the compressed image group 2 is completed, the same processing as that of the compressed image group 2 is performed on the compressed image group 1.

As described above, by configuring the compressed data reading unit 2 shown in FIG. 2, it is not necessary to read the same compressed image data from the hard disk 1 many times, so that the data reading speed can be improved. it can.

Next, another embodiment of the compressed image reproducing apparatus of the present invention will be described with reference to FIG. Here, the image decoding unit 3 which is the main difference from the above embodiment is described.
This is mainly described. Other configurations are basically the same as those described in the above embodiment.

That is, in the image decoding unit 3 of FIG. 3, the compressed image decoding unit 30 uses the compressed image data output from the compressed data reading unit and the decoded image temporarily stored in the intermediate image storage unit 31 to conform to the H263 standard. Is a means for decoding and outputting compressed image data based on the image data, and for temporarily storing a decoded image instructed from outside the image decoding unit 3 in the intermediate image storage means 31.

The intermediate image storage means 31 is means for temporarily storing a decoded image output from the compressed image decoding means 30 and instructed from outside the image decoding section 3.

The operation when the image decoding section 3 is configured as shown in the block diagram of FIG. 3 will be described with reference to FIG.

Since the processing for each compressed image group is the same as in the above-described embodiment described above,
The processing operation of the compressed image group 2 will be described. At this time, it is assumed that the reverse reproduction control unit 5 specifies the decoded image to be temporarily stored in the intermediate image storage unit 31, and P2 is specified. The method for determining the designation of P2 will be described in detail in an embodiment described later.

As shown in FIG. 8, the processing is performed until the decoded images of the compressed image group 2 are all displayed in the order from the image having the larger display order to the image having the smaller display order, that is, P5, P4, P3, P2, P1, and I0. Do.

First, the reverse reproduction control means 5 specifies the decoded image P2 to be extracted in the compressed image group 2 to the compressed image decoding means 30. First, in order to display P5, all the compressed image data of the compressed image group 2, that is, I0 to P5, is read from the hard disk 1 by the compressed data reading unit 2.

The read compressed image group 2 is decoded by the compressed image decoding means 30 to P5 which is the last image of the decoded compressed image group 2, and only P5 is output to the image display means. At this time, the decoded image P2 decoded in the course of decoding P5 is temporarily stored by the intermediate image storage means 31. The output P5 is displayed as an image by the image display means 5.

Next, processing is performed to display P4.
Since the decoded P2 is temporarily stored in the intermediate image storage unit 31, the compressed image data of P3 and P4 of the compressed image group 2 is read from the hard disk 1 by the compressed data reading unit 2, and the compressed image decoding unit 30 Decodes P4 using the read compressed image data P3 and P4 and P2 temporarily stored in the intermediate image storage means 31, and is output to the image display means 5 and displayed.

Similarly, to display P3, similarly to P4,
Since the already decoded P2 is temporarily stored in the intermediate image storage means 31, the compressed image data of P3 in the compressed image group 2 is read from the hard disk 1 by the compressed data reading unit 2
The compressed image decoding unit 30 decodes P3 using the read compressed image data P3 and P2 temporarily stored in the intermediate image storage unit 31, and outputs the decoded image to the image display unit 5 for display. .

Next, regarding the display of P2, since the decoded image is temporarily stored in the intermediate image storage means 31, the intermediate image storage means 31 sends the compressed image decoding means 30.
Is output to the image display means via the CPU and displayed.

When displaying P1 and I0, the temporarily stored P2 cannot be used. Therefore, as described with reference to FIG. 7, the compression from the head of the compressed image group to the image to be displayed next is performed. The image data is read out and decoded in order from the first compressed image data to obtain a display image.

As described above, by configuring the image decoding unit 3 as shown in the block diagram of FIG.
1 to store the decoded image in the middle of the compressed image group data, only the necessary portion of the compressed image group data needs to be read, so that the amount of compressed image data to be read can be reduced, and Since it is not necessary to perform decoding from the head of the compressed image group on the image whose display order is larger than the stored decoded image, the decoding processing amount in the compressed image decoding unit 30 can be reduced, and efficient reverse reproduction can be performed. It becomes possible.

In FIG. 3, the reverse reproduction control means 5 designates a decoded image to be temporarily stored in the intermediate image storage means 31. However, the present invention is not limited to this. For example, as shown in FIG. The configuration performed by the means 40 may be adopted. Hereinafter, the configuration example of FIG. 4 will be described.

That is, in FIG.
Numeral 0 is means for determining an intermediate image from the data of the compressed image group so that the decoding process in the image decoding unit 3 is minimized. When decoding P5 in FIG. 8, all data of the compressed image group 2 is read once. At this time, the data configuration of the compressed image group 2 is analyzed by the extracted image determination means 40, and the image decoding unit 3 Is determined such that the decoding process of the image data is minimized.

As a result of the analysis, it is determined that P2 is optimal as an intermediate image to be temporarily stored in the compressed image group 2, and an instruction is sent to the image decoding unit 3.

Here, minimizing the decoding process means that the number of decoded compressed images to be decoded within the compressed image group is the minimum and the number of decoded inter-frame coded images having a large decoding processing amount. (Number of P) is to be minimized.

By providing the extracted image determining means 40 as described above, it is possible to determine an optimal intermediate image for each compression group according to the data structure of each compressed image group.

Although the above embodiment has been described with reference to the case where one intermediate decoded image is stored, any number of decoded images may be used.

In the embodiment of FIG. 3, the compressed data reading section 2 has been described as being configured to always read the compressed image data from the hard disk 1. However, the present invention is not limited to this. For example, the compressed data reading section of FIG. Of course, the configuration may be replaced with the compressed data reading unit shown in FIG.

Further, a magnetic disk or an optical disk on which a program for causing a computer to execute all or a part of the functions of all or a part of the means of any of the above-described embodiments is prepared. Using this, the same operation as described above can be performed. Even in this case, the same effect as described above is exerted.

As described above, in the compressed image reproducing apparatus of the present invention, every time one decoded image is displayed, the compressed image data from the head of the compressed image group to the image to be displayed is read out, and the compressed image data is sequentially read from the head compressed image data. To obtain a display image, reverse playback is possible without a frame memory for storing the decoded image.

Since the compressed data reading section is provided with the compressed image data storage means, it is not necessary to read the same compressed image data from the recording medium many times, so that the data reading speed can be improved.

Further, if an intermediate image storing means is provided in the image decoding unit to store the intermediate decoded image of the compressed image group data, only the data of the compressed image group necessary for decoding needs to be read. Since the data amount of the compressed image data can be suppressed, and it is not necessary to perform decoding from the head of the compressed image group each time, the decoding processing amount can be reduced, and efficient reverse reproduction can be performed.

In addition, by providing the extracted image determining means for determining an intermediate image to be stored, an optimal intermediate image can be determined for each compression group in accordance with the data structure of each compressed image group. .

[0075]

As is apparent from the above description, the present invention has an advantage that the frame memory required for performing the reverse reproduction can be saved as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a compressed image reproducing device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a compressed data reading unit of the compressed image reproducing device according to the embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of an image decoding unit of the compressed image reproducing device according to the embodiment of the present invention.

FIG. 4 is a block diagram in which an extracted image determining unit is added to the configuration of the image decoding unit of the compressed image reproducing device according to the embodiment of the present invention.

FIG. 5 is a block diagram of a conventional compressed image reproducing apparatus.

FIG. 6 is an explanatory diagram showing reverse reproduction of a compressed image group.

FIG. 7 is an explanatory diagram showing a data flow of a main part of the compressed image reproducing device shown in FIG. 1;

8 is an explanatory diagram showing a data flow of a main part of the compressed image reproducing device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hard disk 2 ... Compressed data reading part 3 ... Image decoding part 4 ... Image display means 5 ... Reverse reproduction control means 20 ... Compressed image data reading means 21 ... Compressed image Data switching means 22 ... compressed image data control means 23 ... compressed image data storage means 30 ... compressed image decoding means 31 ... intermediate image storage means 40 ... extracted image determination means 50 ... compression Image group reading means 51 ・ ・ ・ Decoded image storage frame memory 52 ・ ・ ・ Frame memory reading means 43 53 ・ ・ ・ Compressed image decoding means 55 ・ ・ ・ Reverse reproduction control means

Continuation of the front page F term (reference) 5C053 FA23 GB08 GB21 GB29 GB30 GB37 HA25 HA33 KA03 KA24 LA06 5D044 AB07 BC01 CC05 DE12 DE24 DE96 FG10 FG23 GK07 5J064 AA04 BB00 BC01 BC02 BD03

Claims (6)

[Claims] 1. A compressed image group, wherein an arbitrary intra-coded image and one or more inter-frame encoded images between the intra-coded image and the next intra-coded image are displayed as a compressed image group. The compressed image read from a recording medium that records compressed image data that has been compressed and encoded by adding a display order code indicating the order to each encoded image and using both an intra-frame encoded image and an inter-frame encoded image in combination. A compressed image reproducing apparatus that performs reverse reproduction such as reverse reproduction or reverse frame feed based on data, and reads and outputs at least compressed image data in a compressed image group from the recording medium based on a predetermined instruction. A compressed data reading unit; decoding a coded image included in the compressed image data output from the compressed data reading unit; An image decoding unit that outputs only the decoded image in the displayed display order, an image display unit that displays the decoded image output from the image decoding unit, and each time the decoded image is displayed by the image display unit. The designation of a display order smaller than the display order of the decoded images output to the image display means by one or more is performed to the image decoding unit, and further the compressed data readout unit is instructed from the top of the compressed image group by the designation. A reverse reproduction control means for instructing to read out the compressed image data including the encoded image up to the displayed display order. 2. The compressed data reading unit includes: a compressed image data control unit configured to control reading and saving of the compressed image data based on the designation and / or the instruction from the reverse reproduction control unit; Compressed image data reading means for reading and outputting the compressed image data from the recording medium based on an instruction from the compressed image data control means; and temporarily storing the compressed image data read from the compressed image data reading means And a compressed image data storage unit that outputs the temporarily stored compressed image data in response to a read instruction from the compressed image data control unit, wherein the compressed image data control unit is configured to output the compressed image data from the reverse reproduction control unit. The compressed image data from the compressed image data reading means is specified and / or based on the instruction. Or used, or the compressed image data compressed image reproducing apparatus according to claim 1, wherein the determining whether to use the compressed image data stored in the storing means. 3. A compressed image group, wherein an arbitrary intra-coded image and one or more inter-frame encoded images between the intra-coded image and the next intra-coded image are displayed as a compressed image group. The compressed image read from a recording medium that records compressed image data that has been compressed and encoded by adding a display order code indicating the order to each encoded image and using both an intra-frame encoded image and an inter-frame encoded image in combination. A compressed image reproducing apparatus that performs reverse reproduction such as reverse reproduction or reverse frame feed based on data, and reads and outputs at least compressed image data in a compressed image group from the recording medium based on a predetermined instruction. A compressed data reading unit; decoding a coded image included in the compressed image data output from the compressed data reading unit; Compressed image decoding means for outputting only the decoded images in the displayed display order; intermediate image storage means for temporarily storing a part of the decoded images in the compressed image group decoded by the compressed image decoding means; Image display means for displaying the decoded image output from the decoding means; and each time the decoded image is displayed on the image display means, at least one of the display order of the decoded images output to the image display means The compressed image decoding means performs the designation of the small display order to the compressed image decoding unit, and further includes the compressed data reading unit including the encoded image from the predetermined display order of the compressed image group to the designated display order. A compressed image reproducing apparatus, comprising: a reverse reproduction control unit that performs the instruction for reading image data. 4. The compressed image decoding means: (1) when a display order specified by the reverse reproduction control means is larger than a display order of decoded images temporarily stored in the intermediate image storage means, Using the temporarily stored decoded image, decoding of the encoded image from the next display order of the temporarily stored decoded image to the specified display order is performed, and (2) the reverse playback control When the display order specified by the means is the same as the display order of the decoded image temporarily stored in the intermediate image storage means, the temporarily stored decoded image is output to the image display means. The compressed image reproducing device according to claim 3, wherein 5. The decoded image to be temporarily stored based on an analysis result of the compressed image data read from the compressed data reading unit so that a decoding processing amount in the compressed image decoding unit is minimized. 4. The compressed image reproducing apparatus according to claim 3, further comprising an extracted image determining means for determining the compressed image. 6. A program recording program for causing a computer to execute all or a part of the functions of all or a part of the present invention according to claim 1. Medium.