KR20070049504A - Apparatus of playing digital contents and method for saving and playing contents in a reverse direction - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital content reproduction apparatus, and more particularly, to a digital content reproduction apparatus and a reverse content storage and reproducing method thereof, which allow a reproduction direction of a digital content to be changed. To this end, the present invention is a digital content playback unit for decoding and playing digital content; A reverse content generation unit generating reverse image data by encoding and decoding the image frames of the decoded digital content in reverse order; A memory for storing the reproduced digital content and storing the reverse image data; And a control unit which controls digital content to be stored in the forward or reverse direction according to the recording mode and reproduces the forward or reverse content according to the playback mode.

Description

Digital content playback device and its reverse content storage and playback method {APPARATUS OF PLAYING DIGITAL CONTENTS AND METHOD FOR SAVING AND PLAYING CONTENTS IN A REVERSE DIRECTION}

1 is a block diagram showing the internal configuration of a digital content reproduction apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an internal configuration of a memory in FIG.

FIG. 3 is an exemplary view for explaining a process of storing reverse playback content through an internal configuration of a reverse content generating unit of FIG. 1; FIG.

FIG. 4 is an exemplary view for explaining that reverse content is stored according to an internal operation of a reverse content generation unit in FIG. 1; FIG.

5 is a flowchart illustrating a reverse content storage and reproducing method of a digital content reproducing apparatus according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a reverse content storage method according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

10: digital content playback section 11: tuner

12: digital content processing unit 13: video / audio decoder

14: audio processor 15: video processor

16: Reverse content generator 16a: buffer

16b: frame rearranger 16c: encoder

16d: indexing unit 16e: indexing rearrangement unit

16f: index matching unit 17: memory

17a: forward playback content storage unit 17b: index matching information storage unit

17c: reverse playback content storage unit 18: key input unit

19: control unit 20: display unit

100: digital content player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital content reproduction apparatus, and more particularly, to a digital content reproduction apparatus and a reverse content storage and reproducing method thereof, which allow a reproduction direction of a digital content to be reproduced.

In general, digital content refers to video and audio data recorded digitally. The digital content may be stored in a predetermined recording medium (eg, magnetic tape, CD-ROM, hard disk, IC memory, etc.), but also widely downloaded through wired / wireless networks (eg, Internet, broadcasting, etc.). It is becoming.

Recently, as digital broadcasting has become full-fledged, a user can selectively select a plurality of broadcasting channels provided through predetermined digital broadcasting by using a digital broadcasting reproducing apparatus to watch various digital contents provided by corresponding broadcasting channels.

Such digital content is made by a streaming service that can reproduce in real time.

The digital content including the streaming data may be played using an application program for playing digital content such as 'real player' or 'window media player'.

However, since the digital content is only structurally normal playback (Normal Play), the reverse play function is not supported, so the playback direction of the content is displayed in a single forward direction only. There is a problem that the user's convenience is poor when playing the digital content.

Accordingly, an object of the present invention is to provide a digital content reproducing apparatus and a reverse content storing and reproducing method thereof, which are created to solve the conventional problems as described above, and enable the reverse control of digital content. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital content reproducing apparatus for encoding digital content with a reverse direction of digital content reproduction and a method for storing and reproducing the reverse content thereof.

It is also an object of the present invention to provide a digital content reproducing apparatus for encoding reverse digital content by reducing the data capacity of the reverse digital content in comparison with the forward digital content, and a reverse content storing and reproducing method thereof.

The present invention for achieving the above object, the digital content playback unit for decoding and playing the digital content;

A reverse content generation unit generating reverse image data by encoding and decoding the image frames of the decoded digital content in reverse order;

A memory for storing the reproduced digital content and storing the reverse image data;

The controller may be configured to store digital content in a forward or reverse direction according to a recording mode, and to control forward or reverse content in accordance with a playback mode.

In addition, the present invention for achieving the above object, the memory for storing the forward or reverse content in accordance with the recording mode;

A key input unit having function keys for forward content recording and playback and reverse content recording and playback;

A control unit which stores contents in a forward or reverse direction and controls an overall operation to play forward or reverse contents stored in the memory according to a playback mode;

And a display unit for displaying forward or reverse digital content reproduced under the control of the control unit.

In addition, the present invention for achieving the above object, the process of decoding and displaying the image of the received digital content;

Storing forward image data of the received digital content in a forward recording mode;

In the reverse recording mode, storing the reverse image data by encoding the image frames of the received digital content in reverse order and then encoding the image frames;

After the forward or reverse recording mode is terminated, a process of reproducing and displaying the stored forward data or reverse video data according to the playback mode may be performed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation and operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

In the following description, specific details of the apparatus for reproducing digital content of the present invention and a method for storing and reproducing the reverse content thereof are shown to provide a more general understanding of the present invention. It will be apparent to one of ordinary skill in the art that the present invention may be readily practiced without these specific details and also by their modifications.

In the following description the forward playback content will be used directly, meaning forward transport stream packet (TS). In addition, in the following description, the reverse playback content will be immediately used to mean a video stream packet which is indexed in the reverse order by reducing the number of video frames of the decoded transport stream packet.

On the other hand, in the embodiment of the present invention to enable the digital content to be played in the reverse direction, and to play the reverse playback content more naturally and smoothly. Accordingly, the video frames of the forward playback content are reduced to a predetermined number of video frames, the video frames are arranged in reverse order, encoded, and packetized to store the video stream packets. At this time, in order to make the most of the limited memory, the number of video frames is reduced so that the reverse playback content is stored.

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

1 is a block diagram showing the internal configuration of a digital content reproduction apparatus according to an embodiment of the present invention.

Referring to FIG. 1, in the digital content reception mode, the tuner 11 receives a transport stream packet (TS) of a corresponding broadcast channel desired by a user in real time through a wireless network. The wireless network includes digital broadcasting received in real time through satellite, terrestrial, wired / wireless Internet, and the like. Here, the transport stream packet will be briefly described as follows.

The digital content uses a Motion Picture Experts Group (MPEG) -2 TS as a transmission standard of a wireless network. It consists of a 1 byte byte transport stream packet consisting of a 4 byte header and a 184 byte payload. The payload may include an I-frame, a P-frame, or a B-frame. Since the transport stream packet is a generally known technique corresponding to digital broadcasting, a detailed description thereof will be omitted.

The digital content processing unit 12 receives the transport stream packet of the corresponding digital content or the forward stream packet of the digital content recorded through the tuner unit 11, and separates the video data and the audio data, and the video And audio data are synchronized. That is, the digital content processor 12 may include a demultiplexer for demultiplexing video and audio data, and a synchronizer for synchronizing video and audio data. In this case, the demultiplexer can be replaced by a parser because it is a role of parsing.

The video / audio decoder 13 decodes and decodes the separated video and audio data. Also, the video / audio decoder 13 decodes and decodes an image stream packet stored in a reverse play mode view direction. The tuner 11, the digital content processor 12, and the video / audio decoder 13 are collectively referred to as a digital content player 10.

The audio processor 14 reproduces the decoded audio signal and outputs the decoded audio signal to the speaker SPK.

The video processor 15 reproduces the decoded video signal and outputs the decoded video signal to the display unit 20.

The reverse content generator 16 reduces the video data decoded by the video / audio decoder 13 by a predetermined number of frames from the number of frames per second, rearranges the image frames in reverse order, and rearranges the rearranged image frames. After encoding and packetizing, the video stream packets in the reverse order are first indexed. In addition, the reverse content generating unit 16 stores information in which the first index information of the recorded forward transport stream packet and the second index information of the reverse video stream packet corresponding to the forward transport stream packet are matched. Will output

The memory 17 may be composed of a program memory and a data memory. The program memory stores programs for controlling operations according to the forward recording and playback modes and the reverse recording and playback modes. In addition, the data memory stores forward and reverse playback contents. Here, the forward playback content and the reverse playback content include first and second index information. In addition, the data memory stores index matching information matching the first and second index information output by the reverse content generating unit 16. In addition, the data memory temporarily stores data generated during the execution of the programs. In this case, the first and second index information and the index matching information are information for controlling the reproduction direction (the reproduction direction over time). Since the number of image frames of the digital content in the forward and reverse direction is different from the index matching information, matching information should exist between the forward and reverse digital content.

The key input unit 18 includes keys for inputting numeric and character information and function keys for setting various functions. In addition, the key input unit 18 may include a digital content receiving key, a forward recording key, a reverse recording key, a forward playback key, a reverse playback key, and the like according to an embodiment of the present invention.

The controller 19 controls a general operation of the digital content player 100. Thus, the control unit 19 controls the overall operation according to the forward playback mode and recording mode, and the reverse playback mode and recording mode. That is, in the forward recording mode, the controller 19 receives the transport stream packet from the tuner 11 and sequentially indexes the packet and stores the packet in the memory 17. In the reverse recording mode, the controller 19 divides the video data output through the video / audio decoder 13 into predetermined video frame intervals, and simultaneously reduces the number of video frames in the region divided by the predetermined video frame intervals. After the video frames are encoded in the reverse order, indexes are assigned to the packetized video stream packets in the reverse order and stored in the memory 17. FIG. The predetermined video frame interval is, for example, 30 FPS (Frame Per Second) in the case of a terrestrial digital content player, and 15 FPS in the case of a satellite digital content player. Therefore, in the region divided by the predetermined image frame interval, 30 FPS is reduced to 15 FPS in case of terrestrial digital content player, and 15 FPS is 7.5 FPS in case of satellite digital content player. In the forward playback mode, the controller 19 reads forward transport stream packets stored in the memory 17 and outputs them to the digital content processor 12 to control the overall operation of playing forward digital content. In the reverse play mode, the controller 19 controls the overall operation of reading the reverse video stream packet stored in the memory 17 and outputting the reverse video stream packet to the video / audio decoder 13 to reproduce the reverse digital content. In addition, the controller 19 uses the image matching index corresponding to the first index information stored in the reverse playback mode, the second index information stored in the reverse recording mode, the image frame corresponding to the current reverse playback position. A packet is read from the memory 17 and controlled to reproduce reverse digital content.

The display unit 20 displays the digital content corresponding to the transport stream packet under the control of the control unit 19. The display unit 20 also displays the forward digital content or the reverse digital content during playback. In this case, the display unit 20 may use an LCD. In this case, the display unit 20 may include an LCD controller, a memory capable of storing image data, and an LCD display device. In this case, when the LCD is implemented using a touch screen, the key input unit 18 and the LCD may be input units.

With reference to the accompanying drawings, the internal structure of the memory 17 for storing the digital content in the forward and reverse direction by the above-described operation process will be described.

FIG. 2 is a diagram illustrating an internal configuration of a memory in FIG. 1.

Referring to FIG. 2, first, the memory 17 of the present invention includes a forward playback content storage unit 17a for storing forward digital content under the control of the controller 19 in the forward recording mode. The memory 17 also includes a reverse playback content storage unit 17b for storing reverse digital content under the control of the control unit 19 in the reverse recording mode. The memory 17 also stores index matching information that matches the first index information of the recorded forward transport stream packet and the second index information of the reverse video stream packet corresponding to the forward transport stream packet. An information storage unit 17c is provided.

In order to store the reverse digital content of the present invention in the reverse playback content storage 17b, the reverse digital content is stored by the following process.

FIG. 3 is an exemplary view for explaining a process of storing reverse playback content through an internal configuration of the reverse content generating unit of FIG. 1.

Referring to FIG. 3, first, description will be made on the assumption of forward and reverse recording modes. Then, the digital content of the transport stream packet of the corresponding broadcast channel in real time is restored by the digital content processing unit 12 and the video / audio decoder 13 and displayed on the display unit 20. At this time, the output video data of the video / audio decoder 13 is input to the buffer 16a, temporarily stored, and then input to the frame rearranging unit 16b.

Accordingly, the frame rearranger 16b divides the video data into predetermined image frame intervals, reduces the number of image frames in the region divided by the predetermined image frame intervals, and rearranges the image frames in the reverse order, thereby encouraging the next stage 16c. Will output In the present invention, it is preferably reduced to half of the number of frames per second.

The encoder 16c then encodes the rearranged video frames in reverse order and packetizes them to output them.

The indexing unit 16d sequentially indexes the packetized video stream packet, The indexed video stream packets are rearranged in the reverse order by the indexing rearrangement 16e.

Thereafter, the index matching unit 16f performs reverse video stream together with index matching information that matches the first index information of the forward transport stream packet and the second index information of the reverse video stream packet corresponding to the forward transport stream packet. The packet is output to the memory 17. The memory 17 stores reverse digital content (including index matching information and second index information).

Meanwhile, in the forward recording mode, the transport stream packet output through the tuner 11 is stored in the memory 17 as it is.

In order to help the understanding of a series of operation process according to the reverse recording mode described so far, it will be described in detail with reference to the accompanying drawings.

FIG. 4 is an exemplary view for explaining that reverse content is stored according to an internal operation of the reverse content generating unit of FIG. 1.

Referring to FIG. 4, first, the buffer 16a temporarily stores video data of an input digital content as shown in FIG. 4 (a). Thereafter, the frame rearrangement unit 16b receives video data from the buffer 16a and divides the video data into predetermined image frame intervals as shown in FIGS. 4B and 4C. After reducing the number of video frames in the area, the video frames are rearranged in reverse order.

Then, in FIG. 4 (d), the encoder 16c encodes the rearranged video frames in the reverse order and sequentially indexes the video stream packets obtained by packetizing the encoded video frames as shown in FIG. 4 (e). Packet_0 ~ Packet_N) is assigned.

The indexing rearrangement unit 16e rearranges the indexed video stream packets in reverse order as shown in FIG. 4 (f). For example, the video stream packet indexed as 'Packet_0' in FIG. 4 (e) is indexed as 'P_N' as the last video stream packet as shown in FIG. 4 (f) by indexing rearrangement. In addition, the video stream packet indexed as 'Packet_N' in FIG. 4 (e) is the first video stream packet as shown in FIG. 4 (f) and indexed as 'P_0' by indexing rearrangement.

That is, the packet stream is packetized into an image stream packet, and is sequentially indexed as 'Packet_0 → Packet_1 → ·· Packet_N', and the sequentially indexed video stream packet is 'Packet_N → · →→ Packet_1 → Packet_0' After rearranging in order, the indexing is rearranged as 'P_0 → P_1 → P_N'.

According to this process, the second index information of the reverse digital content, the image stream packet, and the index matching information of the first index information and the second index information of the forward digital content are stored in the memory 17.

5 is a flowchart illustrating a reverse content storage and reproducing method of a digital content reproducing apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in step 501, the controller 19 determines whether a key input by a key operation of the key input unit 18 is a digital content reception mode for receiving digital content through a wireless network.

If the determination result is the digital content reception mode, the controller 19 displays the digital content of the specific broadcast channel in step 503.

At this time, in step 505, the controller 19 determines whether the key input by the key operation of the key input unit 18 is the forward recording mode in which the digital content is sequentially stored.

In the forward recording mode, if the determination result is determined, the transport stream packet of the digital content received in step 507 is indexed and stored.

During the forward recording mode, in step 509, the controller 19 determines whether the key input by the key operation of the key input unit 18 is the reverse recording mode.

In step 511, if the reverse recording mode is determined, the controller 19 reduces the number of frames per second to relocate the video frames, encodes them, packetizes them, and indexes them in reverse order to store the video stream packets.

In addition, the index matching information obtained by matching the first index information of the forward transport stream packet recorded with the second index information of the reverse video stream packet corresponding to the forward transport stream packet is also stored. Here, it should be recognized that step 511 is a key technical point in the present invention.

In operation 513, the controller 19 determines whether the playback mode is the forward playback mode in which the digital content recorded and stored in the forward direction is forwarded.

If the determination result is the forward play mode, in step 515 the control unit 19 controls to play sequentially according to the first index information applied to the transport stream packet stored in the forward direction.

However, if the determination result is not in the forward play mode, in step 517, the controller 19 determines whether the play mode is in the reverse play mode. If the play mode is the reverse play mode, the control unit 19 proceeds to step 519 in response to the second index information. Play in the reverse direction. In this case, reverse playback is possible by index matching information in which the first and second index information are matched with the second index information.

The above-described step 511 is a process for storing the reverse playback content in the reverse recording mode, which will be described in detail with reference to the accompanying drawings.

6 is a flowchart illustrating a reverse content storage method according to an embodiment of the present invention.

Referring to FIG. 6, in step 601, the controller 19 controls to count the number of reconstructed image frames a and proceeds to step 603.

In step 603, the controller 19 determines whether the counted video frame number a is the reference video frame number (for example, 30 FPS for terrestrial digital content and 15 FPS for phase digital content). In this case, the number of reference image frames may be variable and set according to data received in real time through satellite broadcasting, terrestrial broadcasting, and wired / wireless networks.

Thus, if the counted video frame number a is equal to the reference video frame number, in step 605, the controller 19 controls to reduce the predetermined number of video frames in the video frame area including the counted video frame number. In this case, since the predetermined number has been described above, description thereof will be omitted.

In step 607, the controller 19 arranges the video frames in the reverse order in the video frame region, proceeds to step 609 to encode and packetize, and then controls to assign a second index to the packetized video stream packet. .

In step 611, the controller 19 controls the video stream packet to be rearranged in the reverse order of the assigned index.

In operation 613, the controller 19 sequentially re-applies the second index to the rearranged video stream and indexes the second index. At this time, the control unit 19 controls to match the first index of the transport stream packet of the forward playback content and the second index of the video stream packet of the reverse playback content.

Thereafter, in step 615, the controller 19 controls to store the video stream packet of the reverse playback content and to simultaneously store the second index information and the index matching information which is the matching information of the first and second indexes.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described in detail above, the present invention arranges the video frames of digital content in the reverse direction, encodes and stores the arranged reverse video frames, thereby increasing the user's convenience by controlling the reproduction of the digital content in the reverse direction. It works.

In addition, by reducing the number of video frames of digital content to a predetermined number of video frames and storing the video stream packets in the reverse direction, the data capacity of the reverse content can be reduced and stored, and a device capable of receiving digital content can be stored. It is effective to use space efficiently.

In addition, since the number of video frames per second of digital content is reduced to a predetermined number of video frames and encoded, the reverse content with index information is sequentially reproduced according to the index information, thereby displaying a natural reverse video.

Claims (24)

A digital content player for decoding and playing the digital content; A reverse content generation unit generating reverse image data by encoding and decoding the image frames of the decoded digital content in reverse order; A memory for storing the reproduced digital content and storing the reverse image data; And a controller for storing digital content in a forward or reverse direction according to a recording mode and controlling forward or reverse content in accordance with a playback mode. The method of claim 1, wherein the digital content, Digital content playback device characterized in that the data received in real time through satellite broadcasting, terrestrial broadcasting, wired / wireless networks. The method of claim 1, wherein the reverse content generation unit, A frame rearranging unit for dividing the video frames of the decoded digital content at predetermined video frame intervals and rearranging the video frames in reverse order within the divided region; An encoder for encoding and repackaging the video frames rearranged in the reverse order; An indexing unit which sequentially indexes the packetized video stream packet; And an indexing rearrangement unit for rearranging the indexed video stream packets in reverse order. The method of claim 3, wherein the reverse content generation unit, And an index matching unit for matching the first index information of the stored forward digital content and the second index information indexed to the video stream packets rearranged in the reverse order. The method of claim 3, wherein the indexing rearrangement unit, And reindexing indexes sequentially to the video stream packets rearranged in the reverse order. The method of claim 3, wherein the predetermined video frame interval, Digital content playback apparatus characterized in that divided by taking into account the number of frames (FPS: Frame Per Second) according to the time (seconds). The method of claim 3, wherein the frame rearrangement unit, And dividing the video frames of the decoded digital content into predetermined video frame intervals, reducing the video frames to a predetermined number of video frames in the divided region, and rearranging the video frames in reverse order. The method of claim 1, wherein the reverse content generation unit, Reducing the video frame of the decoded digital content to a predetermined number of video frames, arranging the video frames reduced to the predetermined number in reverse order, and encoding the same to generate reverse video data having reduced data capacity. Device. The digital content reproduction of claim 8, wherein the number of image frames is reduced by half in consideration of the number of frame frames per second (FPS) according to the time of the decoded digital content. Device. The method of claim 1, wherein the control unit, Controlling reverse playback of the reverse digital content stored in the memory by using the index matching information in which the first index information stored in the forward recording mode and the second index information stored in the reverse recording mode are matched in the reverse play mode. Digital content playback device. The method of claim 1, wherein the control unit, In the reverse recording mode, the video data output through the digital content reproducing unit is divided into predetermined video frame intervals, the number of video frames is reduced in the region divided by the predetermined video frame intervals, and the video frames are encoded in the reverse order. A digital content reproduction apparatus characterized by controlling to store an index in reverse order to the normalized video stream packet. The method of claim 1, wherein the memory, A forward playback content storage unit for storing forward digital contents in the forward recording mode; A reverse playback content storage unit for storing reverse digital content in the reverse recording mode; And an index matching information storage unit configured to store index matching information obtained by matching first index information of a recorded forward transport stream packet with second index information of a reverse video stream packet corresponding to the forward transport stream packet. Digital content playback device. A memory for storing forward or reverse content according to a recording mode; A key input unit having function keys for forward content recording and playback and reverse content recording and playback; A control unit which stores contents in a forward or reverse direction and controls an overall operation to play forward or reverse contents stored in the memory according to a playback mode; And a display unit for displaying forward or reverse digital content reproduced under the control of the control unit. Decoding and displaying an image of the received digital content; Storing forward image data of the received digital content in a forward recording mode; In the reverse recording mode, storing the reverse image data by encoding the image frames of the received digital content in reverse order and then encoding the image frames; And after the forward or reverse recording mode ends, reproducing and displaying the stored forward data or reverse video data according to the playback mode. The method of claim 14, wherein the storing of the reverse image data comprises: Dividing an image frame of the decoded digital content into predetermined image frame intervals; Rearranging the image frames in reverse order within the divided image frame region; Encoding the rearranged image frames; Packetizing the encoded image frame; And rearranging and storing the packetized video stream packet in reverse order. The method of claim 15, wherein the storing of the reverse image data comprises: Sequentially indexing the packetized video stream packets; Rearranging the indexed video stream packets in reverse order; And sequentially indexing and storing the rearranged video stream packets. The method of claim 15, wherein the predetermined video frame interval, A reverse content storage and reproducing method of a digital content reproducing apparatus, characterized by being divided in consideration of the number of frames per second (FPS) according to a time (second). The method of claim 15, wherein the storing of the reverse image data comprises: Reducing the image frames existing in the image frame area divided by the predetermined image frame interval to the predetermined number of image frames, and rearranging the image frames in reverse order. How to play. 19. The digital content reproduction of claim 18, wherein the number of video frames is reduced by half in consideration of the number of frames per second (FPS) according to the time of the decoded digital content. Reverse content storage and playback of the device. The method of claim 15, wherein dividing an image frame of the decoded digital content by a predetermined image frame interval comprises: Counting the number of video frames of the decoded digital content; Determining whether the counted image frame number is a reference image frame number; If the counted image frame number is the reference image frame number, And reducing a predetermined number of video frames in a video frame area comprising a counted number of video frames. The method of claim 20, wherein the number of reference video frames is A reverse content storage and reproducing method of a digital content reproducing apparatus, characterized in that the variable can be set in accordance with the data received in real time through satellite broadcasting, terrestrial broadcasting, wired / wireless network. The method of claim 14, wherein the storing of the reverse image data comprises: Indexing the first index information in the rearranged video stream packet; And matching and storing the first index information and the second index information of the forward digital content. The method of claim 14, wherein the reproducing and displaying the image data comprises: And reproducing and displaying the reverse digital content by using the index matching information in which the first index information stored in the forward recording mode and the second index information stored in the reverse recording mode are matched in the reverse play mode. A reverse content storage and reproducing method of a digital content reproducing apparatus. The method of claim 14, wherein the digital content, Reverse content storage and playback method of the digital content playback device, characterized in that the data received in real time through satellite, terrestrial broadcast, wired / wireless network.

Images