WO2006046378A1

WO2006046378A1 - Variable speed recording device and variable speed recording method

Info

Publication number: WO2006046378A1
Application number: PCT/JP2005/017726
Authority: WO
Inventors: Hiroshi Nakamura
Original assignee: Pioneer Corporation
Priority date: 2004-10-25
Filing date: 2005-09-27
Publication date: 2006-05-04

Abstract

There are provided a variable speed recording device and a variable speed recording method capable of performing recording with a variable speed in accordance with a reproduction time desired by a user, in a recording medium detachably attached to a mobile telephone or the like. The variable speed recording device (100) includes: map creation means (3, 4) used when recording a content into an HDD (6), for classifying contents of section contents between scene changes, creating a map, and recording it in the HDD (6) for each of content scene changes; section reproduction speed decision means used when reproducing the content from the HDD (6), for reading the element relating to the audio data and the video data corresponding to the section content to be reproduced, from the map and deciding the section reproduction speed of the section content; a variable speed reproduction unit (7) for reproducing the section content at the section reproduction speed; and variable speed recording means for recording the reproduction output of the variable speed reproduction means into a memory card (10).

Description

Specification

Variable speed recording apparatus and variable speed recording method

Technical field

The present invention relates to a variable speed recording apparatus and a variable speed recording method, and in particular, after recording content including received video data and audio data on a first recording means, the first recording means The present invention relates to a variable speed recording apparatus and a variable speed recording method for reproducing at a speed different from that at the time of recording on a first recording means and recording on a second recording means.

Background art

[0002] Conventionally, in a video playback device with audio playback, such as a video tape recorder, a double-speed playback function that allows the user to view the entire video in a short time during playback, a high-speed fast-forward function, and the like are provided. Being

[0003] Further, while accurately detecting a voice section generated by a person and maintaining the synchronization relationship between video and audio faithfully according to the detected voice section, video playback that greatly reduces the time required for viewing by the user As a device, “a moving image reproducing device capable of reproducing moving image information including an audio signal and sub-information at a high speed, based on the sub-information included in the moving image information, a first audio section representing a person's utterance period” And, based on the video information, the first audio segment is a high-speed video with reproduced audio at a predetermined speed at which the user can grasp the content. There is known a moving image reproducing apparatus including a fast-playing reproducing unit that performs at least high-speed moving image reproduction at a speed higher than the predetermined speed while performing the reproduction (for example, Patent Document 1). reference).

[0004] In addition, in the above-mentioned publication (Patent Document 1), when a moving image is reproduced, if the reproduction is performed at a double speed of a high magnification that allows the user to grasp the content by viewing the reproduced image, the change is severe. As a countermeasure against being uncomfortable for some users, the speech interval correction process considers the interval between human speech intervals, and if the interval satisfies a certain condition, a plurality of human speech interval groups It is described that the above-mentioned difficulty of hearing can be resolved by integrating.

[0005] Next, the playback speed depends on whether or not it is a voice (conversation) part during conventional playback! Figure 1 shows an example of changing.

In FIG. 1, after content including video data and audio data is recorded on a recording means, when the recording means power is read and played back at a playback speed different from that at the time of recording, the content of the content is used as audio data. The “conversation part”, “performance part” and “silent part” are divided into “conversation part” categories b, d and f as shown in Fig. 1. In category e, "8x speed 'silent playback" is executed, and in "silent part" categories a and c, "8x speed' silent playback" is executed.

In FIG. 1, the motion of the video data is shown in parentheses as (small motion) (moving) (large motion), but this part is described for comparison with the present invention, and the conventional motion of FIG. In the example, the process of discriminating the movement of video data is not executed.

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-309786 (Claim 1, (0031) (0032))

Disclosure of the invention

Problems to be solved by the invention

[0006] In the conventional variable speed playback device, since the variable speed playback function is integrated with the recording device, the mobile phone, the portable terminal, and the like are not provided with the variable speed playback function. It was difficult to watch the contents outdoors.

In addition, it has been difficult to record content in accordance with the content playback time desired by the user.

As a problem to be solved by the present invention, it is possible to record on a recording means at a variable speed in accordance with a reproduction time desired by a user on a recording medium that can be used detachably in a mobile phone or the like. One example is to provide a variable speed recording apparatus and a variable speed recording method.

Means for solving the problem

[0008] The variable speed recording apparatus according to claim 1 records the content including the video data and the audio data on the first recording unit, and then at a recording speed different from that when recording on the first recording unit. A variable speed recording device for recording to a second recording means,

At the time of recording the content on the first recording means, the content of the section content between scene changes is recorded as audio data and video data for each scene change of the content. A map creating means for creating a map by classifying each element into a plurality of elements and recording the map in the first recording means;

During playback of content from the first recording means,

An element related to audio data and video data corresponding to the section content to be played back is read out from the map power, section playback speed determination means for determining the section playback speed of the section content, and the section playback speed of the section content Variable speed reproduction means for executing reproduction and variable speed recording means for recording the reproduction output of the variable speed reproduction means on the second recording means are provided.

[0009] In the variable speed recording method according to claim 5, after the content including video data and audio data is recorded in the first recording means, the first recording means records the content at a recording speed different from that at the time of recording. A variable speed recording method for recording to the recording means of 2,

When recording the content on the first recording means, a map is created by classifying the content of the section content between scene changes into a plurality of elements for each audio data and video data for each scene change of the content. When reproducing the content recorded in the first recording means and the content of the first recording means, the section is reproduced from the elements related to the audio data and the video data corresponding to the section content recorded in the map. Variable speed recording by determining a speed, executing playback of the section of the content at the section playback speed, and recording the content played back from the first recording means on the second recording means. Execute.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a variable speed recording apparatus and a variable speed recording method according to the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing a schematic configuration of the variable speed recording apparatus and the variable speed recording method according to the embodiment of the present invention, and FIG. 3 shows the classification of audio data and video data according to the embodiment of the present invention. FIG. 4 is a diagram showing a first example in which the playback speed is changed in accordance with FIG. 4, and FIG. 4 is a diagram showing a second example in which the playback speed is changed according to the classification of audio data and video data in the embodiment of the present invention. It is.

First, the configuration of the variable speed recording apparatus 100 of the present invention will be described with reference to FIG. In FIG. 2, 1 is an antenna, 2 is a receiving circuit, 3 is a scene change detector, 4 is an audio'video detector, 5 is an encoder, 6 is an HDD (first recording means), and 7 is OK. A variable speed reproduction unit (variable speed reproduction means), 8 an encoder, and 9 a memory card writing unit to a memory card (second recording means) 10.

In this variable speed recording apparatus 100, the audio / video signal input to the receiving circuit 2 via the antenna 1 that receives the broadcast content (program) is converted into MPEG— at a predetermined bit rate by the encoder 5. The map data detected by the scene change detection unit 3 and the audio'video detection unit 4 is recorded on the HDD 6 as well as encoded in the data of 2 etc. and recorded on the HDD 6.

As the first recording means, instead of the HDD (node disk), other storage devices such as a memory made of semiconductor elements, an optical disk, a magneto-optical disk, etc. may be used. (In this case, the memory card writing unit may be changed to an interface, a connection terminal, etc., if necessary, to be used as a writing unit of another storage device.) .

[0012] Although not shown in FIG. 2, when reproducing content from the HDD 6, elements related to audio data and video data corresponding to the segment content to be reproduced are read from the map and the playback speed of the segment content is read. There is a section playback speed determination means to determine

The variable speed playback unit 7 executes playback of the section content at the section playback speed determined by the section playback speed determination means. Furthermore, the reproduced content is encoded into data such as MPEG-4 at a predetermined bit rate by the encoder 8, and the memory card (second memory) is connected via a writing unit having an interface, connection terminal, etc. suitable for the memory card 10. (2 recording means)

[0013] It should be noted that the bit rate is preferably selected in accordance with the storage capacity of the memory card 10 to which content is to be written. In consideration of the use of the memory card 10 in a portable device, it is desirable to record in a data format suitable for the portable device such as MPEG-4.

In the configuration shown in FIG. 2, the variable speed recording apparatus 100 transmits the broadcast content (program) to the antenna 1. The scene change detection unit 3 and the audio / video indicate the status of the video and audio (section content) between the previous scene change forces for each scene change. The detection unit 4 detects and classifies the map as follows, and records it on the HD D6 in correspondence with the section content encoded by the encoder 5.

If there is no scene change for a certain period of time, it may be classified based on the change point of the audio or video situation.

, Voice ···: Conversation part, Mouth: Music · Sound effect part, C: Silent part

• Video · · a: Intense motion! /, Part, b: moderately moving part, c: close to still image, part In the above explanation, the audio and video are divided into three categories respectively. The force may be divided into three or more categories.

In addition, the magnitude of the motion of the video can be determined by, for example, the magnitude of the MPEG vector or the brightness difference data of the screen.

[0015] Reproduction for recording the content recorded in the first recording means 6 with respect to the second recording means 9 is performed by reading a map recorded together with the contents in the first recording means 6, C) The playback speed determined by the combination of a to c, whether to change the speech speed or to silence.

The following is an example of the playback speed decision rule.

'I a: 1. 5x speed conversion

'I b or c: 2x speed conversion

'Low a: double speed speech speed conversion

'Low b or c: 4x speed conversion

'Her a: 4x silent

'Her b: 8x silent

'Her c: 16x silent

[0016] The playback speed described above is an example, and in the present invention, the playback of the content recorded in the second recording means desired by the user (for example, the content playback ends in 30 minutes, which is the commute time). Based on the It is possible to determine the raw speed.

Next, FIG. 3 shows a first example in which the playback speed is changed in accordance with the above-described classification of audio data and video data.

In FIG. 3, in the same manner as in FIG. 1, when content including received video data and audio data is recorded on the recording means, the contents of the content are used as audio data, “conversation part (ii)” “performance part (mouth)”. ”And“ silent part (c) ”and the movement of the video screen as video data is further divided into“ small movement (c) ”,“ moving (b) ”and“ large movement (a) ”. The combination example above is applied.

[0018] In Fig. 3, "double speed / speech speed conversion" is executed in the categories "b", "d", and "f" of "conversation part", and "4x speed / speech speed conversion" is executed in e of "performance part" In the “silent part” category a, “8 × speed / silent playback” is executed, and in the “silent part” category c, “4 × speed / silent playback” is executed.

Comparing the first example (FIG. 3) in the embodiment of the present invention with the conventional FIG. 1, since the playback speed is set more finely, the change speed of the playback speed during the playback of the content In the example, it can be understood that the shift reproduction screen is gentler than the conventional one and easy to see for the user.

Next, FIG. 4 shows a second example in which the playback speed is changed according to the classification of the audio data and the video data.

In FIG. 4, when content including received video data and audio data is recorded on the recording means, the content of the content is set as audio data, and “conversation part (i)” “performance part (mouth)” “silent part ( C), and the movement of the video screen as video data is divided into “small motion (c)”, “moving (b)” and “large motion (a)”. The points to be applied are the same as in Fig. 3.

[0020] In the example of Fig. 4, the playback speed is determined in consideration of the playback time for variable speed playback, thereby preventing the playback speed from changing more frequently and making the change more user-friendly. This is a fast playback screen.

[0021] In FIG. 4, the time (seconds) described at the top is the normal playback time between scene changes of the content, and the time (seconds) described at the bottom is between the content scene changes. It is the playback time that has been changed. In the example of Fig. 4, when the playback time determined by the rules for determining the playback time in Fig. 3 is less than the predetermined time (8 seconds in the figure), the playback speed is adjusted so that the playback time becomes the predetermined time. It is adjusting.

[0022] That is, in section a of "silent part / small motion", the example in Fig. 3 is "8x silent playback", and the normal playback time of this section a is 40 seconds, so shifting at 8x speed Since later playback time will be 5 seconds, in Fig. 4, this category a is set to "5x speed" so that a playback time of 8 seconds can be secured.

Also, in the category b of “conversation part 'in motion”, in the example of FIG. 3, it is “double speed / speech speed conversion”, and the normal playback time of this category b is 20 seconds, so even after double speed, after shifting Since the playback time of 10 seconds is 10 seconds, the example of FIG. 4 is also played back by “double speed / speech speed conversion” similar to the example of FIG.

[0023] Also, in category c of "silent part · large movement", in the example of Fig. 3, it is "4x speed 'silent playback". Since the normal playback time of this category c is 40 seconds, even at 4x speed Since the playback time after shifting is 10 seconds, the example in Fig. 4 is also played in the same way as the example in Fig. 3. In the example of 3, the force that was “2x speed / speech speed conversion” The normal playback time for this category d is 8 seconds, so the playback time after shifting will be 4 seconds at 2x speed. In example 4, “1x speed” is set to ensure a playback time of 8 seconds.

[0024] In addition, in the example of Fig. 3, in the category e of "performance part · small motion", the force that was "4x speed 'speech speed conversion" The normal playback time of this category e is 30 seconds 4 At double speed, the playback time after shifting is 7 seconds, so in the example in Fig. 4, the playback time of 8 seconds can be secured by setting it to “3.7x speed”.

In addition, in the category f of “conversation part 'in motion”, in the example of Fig. 3, it is “double speed” and “speech speed conversion”. Since the normal playback time of this category f is 30 seconds, even after double speed, Since the playback time of 15 seconds is 15 seconds, the example in Fig. 4 is also played with the same "double speed / speech speed conversion" as in the example in Fig.

[0025] In the example of FIG. 4, when the playback time is less than the predetermined time (8 seconds in the example of the figure), the playback speed is determined so that the playback time becomes the predetermined time. Speed This is a variable speed playback screen that prevents the change and makes it easier for the user to see. Note that in Figure 4, the playback time after the shift is set to 8 seconds. The force must always be 8 seconds. It can be set to a different time, such as 2 to 3 seconds, or changed according to the user's preference.

[0026] Next, a procedure for recording content including video data and audio data on the HDD 6 and then recording the content on the memory card 10 from the HDD 6 at a recording speed different from that at the time of recording will be described. 'First, when recording the content on the recording means, for each scene change of the content, the content of the section content between scene changes is classified into a plurality of elements for each audio data and video data, and a map is created to the HDD 6 Record. (Step S1)

• During playback of content from the HDD 6, the section playback speed is determined from the elements related to the audio data and video data corresponding to the section content recorded in the map. (Step S2)

• Perform playback of the corresponding section of the content at the section playback speed. (Step S3) • Record the content played back from the HDD 6 on the memory card 10. (Step S4)

As described above in detail, the variable speed recording apparatus 100 according to the embodiment of the present invention records content (program) including video data and audio data in the HDD (first recording means) 6. After that, it is a device that records to the memory card (second recording means) 10 at a recording speed different from that when recording to the HDD 6. When recording content to the HDD 6, the content changes between scene changes. The map creation means to classify the content of the section content into multiple elements for each audio data and video data, create a map and record it to the HDD 6, and correspond to the section content to be played back when playing the content from the HDD 6 The section playback speed determining means for reading out the elements related to the audio data and the video data also for determining the section playback speed of the section content, and the section playback speed. A variable-speed playback unit (variable-speed playback unit) 7 that executes playback of content, and a variable-speed recording unit that records the playback output of the variable-speed playback unit 7 in a memory card (second recording unit) 10 To do.

In addition, the variable speed recording method according to the embodiment of the present invention includes video data and audio data. The content (program) including the data is recorded on the HDD (first recording means) 6 and then recorded on the memory card 10 (second recording means) 10 at a recording speed different from that at the time of recording. When recording to HDD6, for each scene change of content, the content of the section content between scene changes is classified into multiple elements for each audio data and video data, and a map is created and recorded on HDD6. The step S2 for determining the segment playback speed from the elements related to the audio data and the video data corresponding to the segment content recorded in the map at the time of reproducing the content of the HDD 6 power, and the segment of the content by the segment playback speed. This is a method including a step S3 for executing the reproduction of the content and a step S4 for recording the content reproduced from the HDD 6 on the memory card 10.

As a result, the content recorded on the HDD (first recording means) 6 is played back at a variable speed for recording on the memory card (second recording means) 10, and the output is output from the encoder 8, the memory card writing unit. The data is written into the memory card (second recording means) 10 through 9. The content written in this manner is shifted to the value desired by the user for the recording time in the second recording means 10, so a mobile phone that does not have special playback or variable speed playback functions. And can be played back as variable-speed content on mobile terminals.

Therefore, the user can set the playback time of the content at a time that matches the commuting time, so that the user can use the mobile phone or mobile terminal with special playback and variable speed playback functions during commuting. It becomes possible to play.

[0028] In the above description, after the content (program) is recorded on the HDD (first recording means) 6, the memory card (second recording means) 10 is recorded at a recording speed different from that for recording on the HD D6. For each scene change of content, the playback speed of the H DD force is determined based on a map that classifies the content of the section content between scene changes into a plurality of elements for each audio data and video data. However, it is also possible for the user to arbitrarily select the HDD power playback speed and record it on the memory card.

This application is based on a Japanese patent application filed on October 25, 2004 (Japanese Patent Application No. 2004-309479), the contents of which are incorporated herein by reference.

Brief Description of Drawings

[0029] [FIG. 1] An example of changing the playback speed depending on whether or not the power is a voice part in the prior art. FIG.

FIG. 2 is a diagram showing a schematic configuration of a variable speed recording apparatus according to an embodiment of the present invention. [3] FIG. 3 is a diagram showing a first example in which the playback speed is changed in accordance with the classification of audio data and video data in the embodiment of the present invention.

[4] FIG. 4 is a diagram showing a second example in which the playback speed is changed according to the classification of audio data and video data in the embodiment of the present invention.

Explanation of symbols

1 Antenna

2 Receiver circuit

3 Scene change detector

4 Audio 'Video element detector

5 Encoder

6 HDD (first recording means)

7 Variable speed playback unit (variable speed playback means)

8 Encoder

9 Memory card writer

10 Memory card (second recording means)

Claims

The scope of the claims

[1] Variable-speed recording in which content including video data and audio data is recorded on the first recording means and then recorded on the second recording means at a recording speed different from the recording on the first recording means A device,

When recording the content on the first recording means,

Map creation means for creating a map by classifying the content of the section content between scene changes into a plurality of elements for each audio data and video data for each scene change of the content, and recording the map on the first recording means;

During playback of content from the first recording means,

Section reproduction speed determining means for reading out the elements relating to the audio data and video data corresponding to the section content to be played back, and determining the section playback speed of the section content;

Variable speed playback means for executing playback of the section content at the section playback speed; variable speed recording means for recording the playback output of the variable speed playback means in the second recording means;

A variable speed recording apparatus comprising:

[2] The recording speed to the second recording unit is controlled by the variable-speed playback unit so as to coincide with the playback time of the content recorded on the second recording unit. The variable speed recording apparatus according to 1.

3. The variable speed recording apparatus according to claim 2, wherein the second recording means is a recording medium that is detachably used in a portable device.

[4] After content including video data and audio data is recorded in the first recording means, the second recording means is recorded at a recording speed selected by the user different from the time of recording in the first recording means. Variable speed recording device for recording.

[5] A variable speed recording method in which content including video data and audio data is recorded on the first recording means, and then recorded on the second recording means at a recording speed different from that at the time of recording from the first recording means. Because

When recording the content in the first recording means, For each scene change of the content, classifying the content of the section content between scene changes into a plurality of elements for each of audio data and video data, creating a map, and recording the map on the first recording means;

Determining a segment playback speed from elements related to audio data and video data corresponding to the segment content recorded in the map when reproducing the content from the first recording means;

Executing playback of the relevant section of the content at the section playback speed; recording content played back from the first recording means on the second recording means;

A variable speed recording method comprising:

6. The recording speed to the second recording unit is controlled by the variable speed reproduction unit so as to coincide with the reproduction time of the content recorded on the second recording unit. A variable speed recording method as described in 1.