JP2001094949A - Digital broadcast recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast recording and reproducing device, with which a viewer would not overlook a scene considered to be important, when adopting overtake reproduction up to a scene that is broadcast at present. SOLUTION: When a user instructs the overtake reproduction, a pack read section 12 reads a pack consisting of a video frame and an audio frame of a TS(transport stream) recorded in a storage medium 6. After an audio level read section 13 reads an audio level of the read pack, a reproduction pack discriminating section 14 selects a pack whose audio level is higher than a threshold level stored in a threshold storage section 16 and packs before and after that pack. When a reproduction data processing section 15 receives the selected packs, the processing section 15 extracts video and audio frames from these packs, and a decoding circuit 7 decodes these frames and outputs the decoded frames as video data and audio data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording / reproducing a digital broadcast using a medium which can be randomly accessed.

[0002]

2. Description of the Related Art By changing a television broadcast to a digital broadcast, a received program can be recorded as a digital signal using a randomly accessible medium such as a hard disk. When a digital broadcast recording / reproducing apparatus using such a randomly accessible medium appears, a function of reproducing and viewing a broadcast scene slightly earlier than a scene being broadcast can be realized. In this way, for example, in order to catch up with the scene currently being broadcast when playing back a slightly earlier broadcast scene, such as by pausing, fast-forward playback at a constant speed until catching up, or
There has been proposed a method of connecting scenes up to the currently broadcasted scene by selecting and playing back several scenes from the scenes up to the currently broadcasted scene.

[0003] Means for catching up from the broadcast scene a little before to the scene currently being broadcast is hereinafter referred to as "catch-up reproduction". Further, fast-forward playback of a digital broadcast is realized by decoding and playing back a signal of one frame every several frames. That is, when fast-forward playback is performed, as shown in FIG. 10, after decoding and reproducing the signal of the first frame indicated by hatching, the signal for n frames is skipped and the hatching is performed in the same manner as in the first frame. N indicated by
The signal of the (+1) th frame is decoded and reproduced. Therefore, in normal reproduction, signals of all frames are decoded and reproduced, whereas in fast-forward reproduction, signals are decoded and reproduced at a rate of one frame in several frames.

[0004]

However, when catch-up playback is performed by constant-speed fast-forward playback, fast-forward playback is always performed at a constant playback speed in a scene during the catch-up playback, so that the viewer wants to view. Sometimes you miss a scene or an important scene. Also, when catch-up playback is performed by selecting and playing back several scenes, a scene that the viewer wants to view or an important scene may not be played back during the catch-up playback.

In view of the above-described problems, the present invention provides a digital broadcast recording / reproducing apparatus in which a viewer does not miss a scene considered to be important when performing catch-up reproduction to a currently broadcast scene. The purpose is to do.

[0006]

In order to achieve the above object, a digital broadcast recording / reproducing apparatus according to claim 1 is provided.
A digital broadcast recording / reproducing apparatus which has a recording medium which can be randomly accessed and records and reproduces video and audio multiplexed information of a received program on the recording medium. When playing back, in order to catch up with the currently broadcasted scene, fast-forward playback and catch-up playback function, and importance determination means for determining importance of the scene according to the audio level in the scene to be played back And when the fast forward playback is performed using the catch-up playback function, the scene determined to be important by the importance determination means is played back at a normal playback speed.

In such a digital broadcast recording / reproducing apparatus, as described in claim 2, when fast-forward reproduction is performed by the catch-up reproduction function, a scene determined to be important by the importance determining means and a scene before and after the scene determined to be important. The scene may be reproduced at a normal reproduction speed.

According to a third aspect of the present invention, in the importance determining means, a scene whose sound level of a scene to be reproduced is higher than a predetermined value is set as a high importance scene, so that the viewer can enjoy sports, for example. It is possible to watch important scenes such as when the cheers of the audience are high in the program. At this time, by allowing the viewer to change the predetermined value, it is possible to change the ratio of scenes for normal reproduction. By doing so, catch-up reproduction can be performed at a speed desired by the viewer.

According to a fourth aspect of the present invention, in the digital broadcast recording / reproducing apparatus according to the third aspect, the scene of high importance determined by the importance determination means is longer than a predetermined time, Ordinary reproduction may be performed when recording is continuously performed.

According to a fifth aspect of the present invention, there is provided a digital broadcast recording / reproducing apparatus according to any one of the first to fourth aspects, wherein the audio level is the digital information recorded on the recording medium. Is determined from the code representing the audio level included in the audio information.

According to such a digital broadcast recording / reproducing apparatus, a TS (Transport std) having video information and audio information is provided.
From ream), audio data representing audio information and video data representing video information are recorded on a recording medium as a pack for each scene. Then, audio data is extracted from the pack recorded on the recording medium, and the importance of the scene in the pack is determined from a scale factor in the audio data, which is a code indicating the audio level. At this time, if it is determined to be important, the scene based on the video data and audio data of this pack is reproduced at a normal reproduction speed.

According to a sixth aspect of the present invention, there is provided a digital broadcast recording / reproducing apparatus having a recording medium that can be randomly accessed, and recording and reproducing digital information in which video and audio of a received program are multiplexed on the recording medium. In a broadcast recording / playback apparatus, when playing back a past scene prior to a currently broadcasted scene, in order to catch up with the currently broadcasted scene, fast-forward playback and catch-up playback function, Importance determining means for determining the importance of the scene in accordance with the presence or absence of, when fast-forward playback using the catch-up playback function, the scene determined to be important by the importance determination means The reproduction is performed at a normal reproduction speed.

In such a digital broadcast recording / reproducing apparatus, as described in claim 7, during fast-forward reproduction by the catch-up reproduction function, a scene determined to be important by the importance determining means and a scene before and after the scene determined to be important. The scene may be reproduced at a normal reproduction speed.

In the digital broadcast recording / reproducing apparatus according to the present invention, the importance determining means determines whether or not there is a line in a continuous scene based on whether or not a sound corresponding to the scene has a break. When there is a break in the sound, the scene is determined to have dialogue, and the scene is determined to be important.

[0015] In the digital broadcast recording / reproducing apparatus, as described in claim 9, the interruption of the audio according to the scene is caused by changing the audio level included in the audio information of the digital information recorded on the recording medium. The determination may be made based on the sign. According to such a digital broadcast recording / reproducing apparatus, audio data representing audio information and video data representing video information are recorded on a recording medium as a pack for each scene from a TS having video information and audio information. Then, audio data is extracted from the pack recorded on the recording medium, and a break in the audio is detected from a scale factor in the audio data, which is a code indicating the audio level, and the importance of the scene in the pack is determined. At this time, if it is determined to be important, the scene based on the video data and audio data of this pack is reproduced at a normal reproduction speed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A first embodiment of the present invention
An embodiment will be described with reference to the drawings. FIG.
1 is a block diagram showing an internal configuration of a digital broadcast recording / playback device of the present embodiment.

A digital broadcast recording / reproducing apparatus 1 shown in FIG.
An antenna 2 for receiving a digital broadcast signal, a tuner 3 for demodulating a broadcast signal transmitted from the antenna 2 and demultiplexing the broadcast signal to obtain a TS (Transport Stream) of a channel selected by a user; A TS separation circuit 4 for separating a video frame having video data, an audio frame having audio data, and each frame having other information data from a TS supplied from the tuner 3.
A recording / reproducing circuit 5 which packs the video frames and audio frames sent from the TS separation circuit 4 for each scene and writes them on the recording medium 6 and reads the packs written on the recording medium 6; A possible recording medium 6, a decoding circuit 7 for decoding data in a video frame and an audio frame extracted from a pack read by the recording and reproducing circuit 5, and outputting the decoded video data and audio data Output terminal OU
T. It should be noted that the term “pack” in this specification refers to a pack of a video frame for one frame and a plurality of audio frames corresponding to the video frame.

The digital broadcast recording / reproducing apparatus 1 has:
CPU (Central Processing Uni
t) 8 and a user interface 9 for receiving an infrared signal from the remote controller 17.
Note that instructions from the user such as recording, reproduction, and catch-up reproduction are given to the digital broadcast recording and reproduction apparatus 1 by the remote controller 17. Further, the CPU 8 controls the tuner 3 to operate the tuner 3 so as to demultiplex the TS of the channel desired by the user.

In the recording / reproducing circuit 5, a packing unit 10 for packing video frames and audio frames sent from the TS separation circuit 4 and a pack sent from the packing unit 10 are stored in the recording medium 6. Pack writing unit 11 for writing
A pack reading unit 12 for reading a pack recorded on the recording medium 6, an audio level reading unit 13 for reading an audio level from a scale factor in an audio frame of the pack read by the pack reading unit 12, and a pack to be reproduced is determined. And a reproduction data processing unit 15 for extracting a video frame and an audio frame from a pack determined to be reproduced by the reproduction pack determination unit 14.
And a threshold storage unit 1 for storing a threshold level of an audio level
6 are provided.

The basic operation of the digital broadcast recording / reproducing apparatus 1 will be described below. First, an operation when a user gives a recording instruction using the remote controller 17 will be described. At this time, an infrared signal of a recording instruction from the remote controller 17 is received by the user interface 9. When a recording instruction is given in this manner, an instruction is given from the CPU 8 to the recording / reproducing circuit 5, and first, the video frame and the audio frame extracted by the TS separation circuit 4 are packed by the packing unit 10. Then, the pack packed by the packing unit 10 is written to the recording medium 6 by the pack writing unit 11.

Next, the user operates the remote controller 1
The operation at the time of giving a reproduction instruction will be described with reference to FIG. At this time, an infrared signal of a reproduction instruction from the remote controller 17 is received by the user interface 9. When the reproduction instruction is given in this manner, the CPU
8, an instruction is given to the recording / reproducing circuit 5, and first, the packs to be reproduced are sequentially read out by the pack reading section 12.
Then, the pack read by the pack reading unit 12 is sent to the reproduction pack determination unit 1 via the audio level reading unit 13.
4 is sent.

At this time, the audio level reading section 13 does not operate because the reproduction is instructed. Then, the reproduction pack determination section 14 selects all the packs to be transmitted and transmits them to the reproduction data processing section 15. Finally, after the video frame and the audio frame are extracted from the pack transmitted to the reproduction data processing unit 15, the extracted video frame and the audio frame are decoded.
, And output from the output terminal OUT as video data and audio data.

In the case where a currently broadcast scene is played back while being recorded, it is possible to perform the above-described recording operation and reproduction operation in parallel. Further, when performing a normal reproduction operation for reproducing a currently broadcasted scene, once the video and audio frames transmitted from the TS separation circuit 4 are once recorded on the recording medium 6 by the recording and reproduction circuit 5, and then again. The recorded video frame and audio frame are read out by the recording / reproducing circuit 5 and decoded by the decoding circuit 7, so that a normal reproducing operation can be performed. When the normal reproducing operation is performed in this manner, the packs written to the recording medium 6 and then read are erased.

The operation when such an instruction of the catch-up playback operation is given to the digital broadcast recording / playback apparatus 1 will be described.
This will be described with reference to FIG. When an infrared signal of a catch-up playback instruction from the remote controller 17 is received by the user interface 9 and a catch-up playback instruction is given (STEP 1), first, the CPU 8 has a predetermined number or more of packs recorded in the recording medium 6. It is determined whether or not (STEP 2). At this time, the recording medium 6
When a certain number of packs are recorded in the memory, an instruction is given to the recording / reproducing circuit 5 to perform catch-up playback, and catch-up playback is performed (STEP 3).
Return to P2.

When the number of packs recorded in the recording medium 6 is smaller than a predetermined number, an instruction is given to the recording / reproducing circuit 5 to perform a normal reproducing operation, and the normal reproducing operation described above is performed (STEP 4). ). Therefore, during the catch-up reproduction in STEP 3, the number of packs recorded on the recording medium 6 decreases, and when the number of packs becomes smaller than a certain number, the processing shifts to STEP 4 and the digital broadcast recording / reproduction value 1
Performs a normal reproduction operation.

The catch-up reproduction operation in STEP 3 will be described below with reference to FIG. First, the pack read from the recording medium 6 by the pack reading unit 12 is sent to the audio level reading unit 13 (STEP 31). The audio level reading unit 13 obtains a scale factor of each audio frame from a plurality of audio frames in the transmitted pack (STEP 3).
2). The scale factor indicates the audio level of the audio data in the audio frame. Therefore, STE
At P32, the audio level reading unit 13 reads the audio level of the pack using this scale factor.

Then, the pack read from the recording medium 6 is sent to the reproduction pack determination section 14. When the pack is transmitted in this way, first, a pack to be a frame to be reproduced when performing fast forward reproduction is selected (STEP 3).
3). The pack selected at this time is hereinafter referred to as a “fast-forward playback pack”. That is, a pack to be reproduced is selected at a rate of one pack for every several packs. Next, it is determined whether or not the audio level of the transmitted pack is higher than the threshold level stored in the threshold storage unit 16 (STEP 3).
4). At this time, when the audio level is equal to or higher than the threshold level,
The process proceeds to STEP 35, and when the audio level is lower than the threshold level, the process proceeds to STEP 38, and after performing the fast forward reproduction process, the process proceeds to STEP 2 in FIG. 2 and the flowcharts in FIGS. 2 and 3 are executed again. .

In STEP 35, a pack for which the audio level is determined to be higher than the threshold level and a plurality of packs having video frames and audio frames up to several frames before this are selected as packs for reproduction.
The pack selected in this manner is hereinafter referred to as a “playback pack”.
Call. The plurality of playback packs selected at this time are continuous packs. Therefore, there is a case where the reproduction pack is repeatedly selected as a reproduction pack.
It is sufficient to select only the pack for which the audio level has been determined. The pack several frames before selected together with the pack determined in STEP 34 at this time is hereinafter referred to as “spare pack”.

Further, in STEP 35, STEP 3
Each time the audio level is determined to be above the threshold level in step 4,
Increase the count by one. That is, for example, in STEP 34
In the case where both the pack determined by the above and the spare pack having the number of packs x are selected as the reproduction pack, when the reproduction pack is selected for the first time, the number of packs of the reproduction pack becomes 1 + x and the count number becomes 1. The count number is n
When the reproduction pack is further selected at the time of (1), the number of the reproduction packs becomes n + 1 + x, and the count number becomes n + 1.

As described above, when the reproduction pack is selected and the count is counted, it is determined whether or not the count is larger than a predetermined value (STEP 36). At this time, for example, as described above, the number of reproduced packs is
+ X (x is the number of spare packs) are continuously selected, and when the count becomes n, this count n
Is greater than or equal to m, the process proceeds to STEP 37 to perform the normal reproduction process, and then proceeds to STEP 2 in FIG. 2. Conversely, if the count number n is smaller than m, the process proceeds to STEP 2 in FIG. , The flowchart of FIG.

The normal reproduction process in STEP 37 will be described with reference to FIG. First, after reducing the count by one (STEP 41), the selected reproduction pack is sent to the reproduction data processing unit 15 (STEP 42). That is,
When the count number becomes m for the first time and the normal reproduction process is performed, the count number becomes m-1, and the number of packs m + x (x is the number of spare packs) selected by the reproduction pack determination unit 14 is reproduced. The data is sent to the data processing unit 15. When the count number becomes m continuously, one playback pack selected by the playback pack determination unit 14 is sent to the playback data processing unit 15.

As described above, when the playback packs are sent to the playback data processing unit 15, video frames and audio frames are extracted from each playback pack and sent to the decoding circuit 7 (STEP 43). As described above, when the video frame and the audio frame are transmitted to the decoding circuit 7, the video frame and the audio frame are decoded, and are output from the output terminal OUT as the video data and the audio data (STE).
P44).

The fast-forward reproduction process in STEP 38 will be described with reference to FIG. First, after initializing the count number (STEP 51), the playback pack determination unit 14 extracts a fast-forward playback pack (STEP 52). At this time, it is determined whether or not the pack selected as the fast-forward playback pack is also selected from the packs selected as the playback pack in STEP 35 of FIG. 3, and the pack once selected as the fast-forward playback pack from this playback pack is determined. Is extracted.

Further, at this time, assuming that the number of packs of the spare pack selected in STEP 35 of FIG. 3 is x, a fast-forward pack is extracted from the pack processed before x + 2 from the pack processed in STEP 34 of FIG. I do. That is,
As shown in FIG. 6, when the pack currently being processed is the pack A, the packs from the pack A to the (x + 1) th pack B are not extracted, and the fast-forward playback pack is compared with the pack before the pack B. Is extracted. still,
The square in FIG. 6 indicates one pack.

As described above, when the fast-forward playback packs are sent to the playback data processing unit 15, video frames and audio frames are extracted from each fast-forward playback pack and sent to the decoding circuit 7 (STEP 53). As described above, when the video frame and the audio frame are transmitted to the decoding circuit 7, each video frame and the audio frame are decoded and output from the output terminal OUT as the video data and the audio data (STEP 54). In this way, only the pack selected as the fast-forward playback pack is processed.

As described above, in the digital broadcast recording / reproducing apparatus which operates as shown in the flow charts of FIGS. 2 to 5, the number of spare packs selected in STEP 35 of FIG. The operation will be described with reference to the examples of FIGS. The squares in FIGS. 7 and 8 indicate one pack. First, the operation when the audio level changes as shown in FIG. 7 will be described. Note that the threshold level is T.

A region X in which the audio level is lower than the threshold level T
3 are STEP31 to STEP3 in FIG.
Steps 4 and 38 are executed to perform the fast forward reproduction process. Then, in the pack P1 whose audio level becomes the threshold level T, a pack having a pack number x + 1 from the pack P1 to a pack P0 x frames before this pack P1 is selected in STEP 35 of FIG. At this time, the count number becomes 1.

Then, the m-th pack P from the pack P1
Since the sound level is higher than the threshold level as shown in FIG. 7 up to m, the count number becomes m in the pack Pm after the steps 31 to 36 in FIG. 3 are repeatedly executed, and the process proceeds to STEP 37 in FIG. The normal reproduction process is performed on the m + x packs P0 to Pm. At this time, the count number becomes m-1. Therefore, as shown in FIG. 7, when the next pack Pm + 1 is processed, since the sound level thereof is higher than the threshold level, the count number becomes m, and the processing shifts to STEP 37 in FIG. 3 to perform the normal reproduction processing on the pack Pm + 1. .

In this manner, the normal reproduction process is performed during the region Y until the audio level becomes lower than the threshold level. Then, as shown in FIG. 7, in an area Z where the audio level becomes lower than the threshold level again, in STEPs 31 to S in FIG.
STEP 34 and STEP 38 are executed to perform fast-forward playback processing.

Next, the operation when the audio level changes as shown in FIG. 8 will be described. Note that the threshold level is T as in FIG.

Region X where the audio level is lower than the threshold level T
8 are the same as in FIG.
Steps 1 to 34 and STEP 38 are executed to perform a fast-forward playback process. Then, in the pack P1 in which the audio level becomes the threshold level T, the number of packs x from the pack P1 to the pack P0 x frames before this pack P1
The pack of +1 is selected in STEP 35 of FIG. At this time, the count number becomes 1.

Then, the pack P1 to the n-th pack P
When the audio level is equal to or higher than the threshold level up to n as shown in FIG. 7, after the execution of STEP 31 to STEP 36 in FIG. 3, the count number becomes n in the pack Pn.
Now, as shown in FIG. 8, when the count number n is smaller than m and the pack Pn + 1 is processed, the audio level thereof becomes lower than the threshold level, so that the processing does not shift to STEP 37 of FIG. -STEP34 and STEP38 are executed, and the fast-forward reproduction process is performed.

At this time, in STEP 52 of FIG.
Number of packs n + x packs P0 selected as reproduction packs
Also, it is determined whether or not Pn is once selected as a fast-forward playback pack, and all the packs selected as fast-forward playback packs are extracted. When fast-forward playback is performed, fast-forward playback packs in packs Pn-x + 1 and subsequent packs x frames before the currently processed pack Pn + 1 are not extracted. As described above, after the fast-forward playback process is performed in the region Y until the audio level becomes lower than the threshold level, the audio level is lower than the threshold level in the subsequent region Z as shown in FIG. , Fast-forward playback processing is performed.

In the digital broadcast recording / reproducing apparatus 1 operating as described above, the user operates the remote controller 1
By making it possible to change the threshold level stored in the threshold storage unit 16 in step 7, the ratio of the number of packs for performing the normal reproduction process can be changed when performing catch-up reproduction. Therefore, the user can change the catch-up reproduction speed by changing the threshold level with the remote controller 17.

It should be noted that the digital broadcast recording / reproducing apparatus of the present invention is not limited to the digital broadcast recording / reproducing apparatus which operates according to the flowchart described above. When a higher pack is detected, the digital broadcast recording / reproducing apparatus may perform a normal reproduction process together with a plurality of packs detected before and after the detected pack. In addition, a plurality of video frames and audio frames corresponding to the video frames are made into one pack, and for each pack, the ratio of frames having a high audio level is checked. The determination may be made.

<Second Embodiment> A second embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a block diagram showing the internal configuration of the digital broadcast recording / playback apparatus of the present embodiment. In the digital broadcast recording / reproducing apparatus shown in FIG. 9, parts used for the same purpose as the digital broadcast recording / reproducing apparatus of the first embodiment (FIG. 1) are denoted by the same reference numerals, and detailed description thereof will be given. Description is omitted.

The digital broadcast recording / reproducing apparatus 1 'shown in FIG.
Represents an antenna 2, a tuner 3, a TS separation circuit 4,
A recording / reproducing circuit 5 ′, a recording medium 6, a decoding circuit 7,
It has a CPU 8 and a user interface 9.
As in the first embodiment, when the user operates the remote controller 17, the operation of the digital broadcast recording / reproducing apparatus 1 'is instructed.

The recording / reproducing circuit 5 'includes a packing unit 10
, A pack writing unit 11, a pack reading unit 12, an audio level reading unit 13, and an audio level reading unit 13.
After extracting a pack that forms a scene with dialogue using the audio level read by the reproduction data processing unit 15
And a reproduction data processing unit 15 for transmitting the reproduction pack to the reproduction pack.

Such a digital broadcast recording / reproducing apparatus 1 '
The basic operations such as the reproducing operation and the recording operation of the digital broadcast recording / reproducing apparatus 1 according to the first embodiment are the same as those of the digital broadcast recording / reproducing apparatus 1 of the first embodiment. Therefore, the operation of the digital broadcast recording / reproducing apparatus 1 'when performing the catch-up reproduction operation will be described below.

At this time, similarly to the first embodiment, when the catch-up reproduction instruction is received from the remote interface 17 by the user interface 9 and the catch-up reproduction instruction is given, the recording medium 6 is first sent to the CPU 8. It is determined whether or not there are a certain number or more of packs recorded in the inside. At this time, when the number of packs recorded in the recording medium 6 is equal to or more than a certain number, an instruction is given to the recording / reproducing circuit 5 ′ to perform catch-up playback, and catch-up playback is performed.

When the number of packs recorded in the recording medium 6 is smaller than a certain number, an instruction is given to the recording / reproducing circuit 5 'to perform a normal reproducing operation, and the normal reproducing operation described in the first embodiment is performed. Is performed. Therefore, during the catch-up reproduction, the number of packs recorded on the recording medium 6 decreases, and when the number of packs becomes smaller than a certain number, the digital broadcast recording / reproduction value 1 'performs a normal reproduction operation. The operation described above is the same as the operation in the flowchart of FIG. 2 described in the first embodiment.

The operation when an instruction is given to the recording / reproduction circuit 5 'to perform catch-up reproduction will be described below. As in the first embodiment, the pack reading unit 1
After the pack has been read from the recording medium 6 by the step 2, the audio level reading unit 13 reads the audio level from the scale factor in the audio frame of the read pack. When the audio level is read in this way, the pack is sent to the reproduction pack determination unit 20, and the presence or absence of audio of the pack is determined based on the read audio level.

At this time, when the audio level exceeds the threshold level stored in advance in the reproduction pack determination section 20, it is determined that there is audio, and the pack is selected together with a plurality of packs before and after that pack. Along with the plurality of packs selected in this way, it is determined whether the sound is continuous or intermittent. If the sound continues intermittently, it is determined that a scene with dialogue is formed by the plurality of packs. . In this way, when a pack that forms a scene with dialogue is selected, this pack and a plurality of packs before and after the pack are selected.
As in the first embodiment, a reproduction pack is selected.

If the sound is continuous in the plurality of packs, it is determined that the music is a scene in which music is flowing.
As in the first embodiment, a fast-forward playback pack is selected at a rate of one frame out of several frames so as to perform fast-forward playback processing. Further, even when it is determined that the pack transmitted to the reproduction pack determination unit 20 has no sound, one out of several frames is performed in the same manner as in the first embodiment so that the fast-forward reproduction processing is performed.
Select a fast-forward playback pack by frame rate.

The playback pack and the fast-forward playback pack selected as described above are sent to the playback data processing unit 15 as in the first embodiment, and the video frames and audio frames extracted from these packs are decoded. It is output after being decoded by the conversion circuit 7. As described above, it is possible to determine whether the scene reproduced by these packs is a scene with dialogue or a scene where music is playing, based on the presence or absence of the sound of the continuous packs and the continuity of the sound. Therefore, when performing catch-up playback, among the scenes determined in this way, a scene with dialogue is regarded as important, normal playback is performed only for that scene, and fast-forward playback is performed for other scenes. Can be.

Further, the pack is not limited to one formed from one video frame and an audio frame corresponding to the video frame. As in the first embodiment, a plurality of video frames and this The corresponding audio frame may be one pack. At this time, for each of the packs, the ratio of the frames with a high audio level and the continuity thereof are checked, and whether the normal reproduction process or the fast-forward reproduction process of the pack is performed is determined based on the ratio and the continuity. Good.

In the first and second embodiments, a digital broadcast recording / reproducing apparatus compatible with satellite broadcasting or terrestrial broadcasting has been described as an example. It is not limited. That is, for example, by using an interface connected to a cable instead of an antenna, it can be used as a digital broadcast recording / playback device compatible with a CATV (cable television) system. Further, the reproduction pack determination unit and the threshold value storage unit of the first embodiment and the reproduction pack determination unit of the second embodiment are provided, and the determination material for performing the normal reproduction during the catch-up reproduction is set to the audio level or the speech The user may be allowed to select whether or not to use.

[0058]

According to the digital broadcast recording / reproducing apparatus of the present invention, when fast forward reproduction is performed using the catch-up reproduction function, a scene with a high audio level can be selected and normally reproduced. Therefore, for example, an important scene that occurs when a cheer of the audience is high in a sports program can be normally reproduced, so when performing catch-up reproduction,
Viewers do n’t miss these important scenes,
Viewers can understand the content. Also, by performing normal reproduction together with scenes before and after such a high audio level scene, the viewer can also see the scene that causes the important scene. Can understand the contents.

Further, according to the digital broadcast recording / reproducing apparatus of the present invention, when fast forward reproduction is performed by using the catch-up reproduction function, a scene with dialogue can be selected and normally reproduced. Therefore, since a scene having dialogue that is relatively easy for the viewer to understand can be played back as an important scene, the viewer does not miss such an important scene when performing catch-up playback. Thus, the viewer can understand the content. In addition, by performing normal reproduction together with scenes before and after such a line-containing scene, the viewer can also see the scene that causes the important scene. Can be grasped.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the internal structure of a digital broadcast recording / playback apparatus according to a first embodiment.

FIG. 2 is a flowchart showing a catch-up playback operation of the digital broadcast recording / playback apparatus according to the first embodiment;

FIG. 3 is a flowchart illustrating a catch-up reproduction operation of the recording / reproduction circuit according to the first embodiment;

FIG. 4 is a flowchart showing a normal reproduction process in the flowchart of FIG. 3;

FIG. 5 is a flowchart showing fast-forward playback processing in the flowchart of FIG. 3;

FIG. 6 is an image diagram showing a relationship between a spare pack and a reproduction pack.

FIG. 7 is an image diagram showing an example of a relationship between an audio level and a pack.

FIG. 8 is an image diagram showing an example of a relationship between an audio level and a pack.

FIG. 9 is a block diagram showing the internal structure of a digital broadcast recording / playback apparatus according to a second embodiment.

FIG. 10 is an image diagram of fast-forward playback.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Digital broadcast recording / reproducing apparatus 2 Antenna 3 Tuner 4 TS separation circuit 5 Recording / reproducing circuit 6 Recording medium 7 Decoding circuit 8 CPU 9 User interface 10 Packing section 11 Pack writing section 12 Pack reading section 13 Audio level reading section 14, Reference Signs List 20 playback pack determination unit 15 playback data processing unit 16 threshold storage unit 17 remote controller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuo Koga 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Takenobu Mitsukoshi 2 Keihanhondori, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. F-term (reference) 5C052 AA01 AC01 AC05 AC08 CC06 CC20 DD06 5C053 FA20 FA23 GB09 GB11 HA24 HA29 HA40 JA01 JA30 KA08 KA20 KA24 LA07 5D044 AB05 AB07 CC04 FG07 FG24 HL11

Claims (9)

[Claims] 1. A digital broadcast recording / reproducing apparatus having a recording medium that can be randomly accessed and recording and reproducing information multiplexed with video and audio of a received program on the recording medium. When playing back the previous past scene, to catch up with the currently broadcasting scene, fast-forward playback and catch-up playback function, and determine the importance of the scene according to the audio level of the scene to be played back When performing fast forward playback using the catch-up playback function,
A digital broadcast recording / playback apparatus for playing back a scene determined to be important by the importance determination means at a normal playback speed. 2. A fast-forward playback by the catch-up playback function, wherein a scene determined to be important by the importance determination unit and scenes before and after the scene are played back at a normal playback speed. 2. The digital broadcast recording / playback apparatus according to 1. 3. The digital broadcast according to claim 1, wherein said importance determining means sets a scene whose sound level of a scene to be reproduced is higher than a predetermined value as a scene of high importance. Recording and playback device. 4. The apparatus according to claim 3, wherein normal reproduction is performed when a scene of high importance determined by said importance determination means continues continuously for a time longer than a predetermined time. Digital broadcast recording and playback device. 5. The digital camera according to claim 1, wherein the audio level is determined from a code representing an audio level included in audio information of the digital information recorded on the recording medium.
The digital broadcast recording / reproducing device according to claim 4. 6. A digital broadcast recording / reproducing apparatus having a randomly accessible recording medium and recording and reproducing digital information in which video and audio of a received program are multiplexed on said recording medium, comprising: When playing back earlier scenes, the fast-forward playback catch-up function to catch up with the currently broadcast scene, and the importance of the scene according to the presence or absence of dialogue in the scene to be played back Determining a degree of importance, and performing fast-forward playback using the catch-up playback function.
A digital broadcast recording / playback apparatus for playing back a scene determined to be important by the importance determination means at a normal playback speed. 7. The fast-forward playback with the catch-up playback function, wherein the scene determined to be important by the importance determination unit and the scenes before and after the scene are played back at a normal playback speed. 7. The digital broadcast recording / playback apparatus according to 6. 8. The importance determining means determines whether or not there is a break in a sound corresponding to the scene in a continuous scene, and determines whether or not there is a break in the sound. 8. The digital broadcast recording / reproducing apparatus according to claim 6, wherein it is determined that there is a scene, and the scene is determined to be important. 9. The method according to claim 8, wherein the interruption of the sound according to the scene is determined from a code representing the sound level included in the sound information of the digital information recorded on the recording medium. Digital broadcast recording and playback device.