JP2010093614A5

JP2010093614A5 -

Info

Publication number: JP2010093614A5
Application number: JP2008262666A
Authority: JP
Filing date: 2008-10-09
Publication date: 2011-12-22
Anticipated expiration: 2028-10-09

Description

上記の目的を達成するために、本発明に係る映像信号再生装置は、入力される映像信号を解析して間引くべきフレームと間引かざるべきフレームとを決定する重要フレーム決定手段と、前記重要フレーム決定手段により決定した間引くべきフレームを間引くフレーム間引き手段と、外部から要求される再生速度を満足するために、前記重要フレーム決定手段により決定した間引かざるべきフレームのみから構成される画像信号の再生速度の調整を行う画像信号再生速度調整手段と、前記重要フレーム決定手段により決定した間引くべきフレームに対応する音声信号を間引く音声間引き手段と、外部から要求される再生速度を満足するために、前記重要フレーム決定手段により決定した間引かざるべきフレームに対応する音声信号のみから構成される音声信号の再生速度の調整を行う音声信号再生速度調整手段とを備え、前記重要フレーム決定手段は、画像信号を解析し、シーンチェンジの位置を検出してその情報を出力するシーンチェンジ検出手段と、音声信号を解析し、無音区間を検出してその情報を出力する無音検出手段と、前記シーンチェンジ検出手段から出力されたシーンチェンジの位置情報と前記無音検出手段から出力された無音区間の情報に基づき、間引くべきフレームを決定する重要フレーム判定手段を有することを特徴とする。 In order to achieve the above object, the video signal reproducing apparatus according to the present invention analyzes an input video signal and determines a frame to be thinned and a frame to be thinned, and the important frame A frame thinning means for thinning out the frames to be thinned determined by the determining means, and a reproduction of an image signal composed only of frames to be thinned determined by the important frame determining means in order to satisfy the reproduction speed required from the outside. In order to satisfy the reproduction speed required from the outside, the image signal reproduction speed adjusting means for adjusting the speed, the sound thinning means for thinning out the audio signal corresponding to the frame to be thinned determined by the important frame determining means, Consists only of audio signals corresponding to frames that should not be thinned determined by the important frame determining means An audio signal reproduction speed adjusting means for adjusting an audio signal reproduction speed, wherein the important frame determining means analyzes the image signal, detects the position of the scene change, and outputs the information thereof. And a silence detecting means for analyzing the audio signal, detecting a silent section and outputting the information, a position information of the scene change outputted from the scene change detecting means, and a silent section outputted from the silent detecting means It has an important frame determining means for determining a frame to be thinned out based on the information .

Claims

An important frame determining means for analyzing an input video signal and determining a frame to be thinned and a frame to be thinned;
A frame thinning means for thinning the frames to thinning determined by the key frame determining unit,
In order to satisfy the playback speed required from the outside, an image signal playback speed adjusting means for adjusting the playback speed of an image signal composed only of frames determined by the important frame determining means that should not be thinned ;
Audio thinning means for thinning out audio signals corresponding to frames to be thinned determined by the important frame determining means;
Audio signal playback speed adjustment for adjusting the playback speed of an audio signal composed only of audio signals corresponding to frames to be skipped determined by the important frame determining means in order to satisfy an externally required playback speed Means and
The important frame determining means includes
Scene change detection means for analyzing the image signal, detecting the position of the scene change and outputting the information;
Silence detection means for analyzing the audio signal, detecting the silent section and outputting the information,
Important frame determining means for determining a frame to be thinned out based on the position information of the scene change output from the scene change detecting means and the silent section information output from the silence detecting means.
A video signal reproducing apparatus characterized by the above .

The silence detecting means analyzes the audio signal, and the section in which the volume level is equal to or lower than a predetermined threshold at a predetermined time, the volume level is equal to or higher than the predetermined threshold at a predetermined time, and the change in the volume level is predetermined. Detects a section that is less than the threshold value as a silent section,
The important frame determination means is a frame before and after the position of the scene change output from the scene change detection means, and a frame in the silent section output from the silence detection means is a frame to be thinned out determining <br/> that video signal reproducing apparatus according to claim 1, wherein the.

The important frame determination unit is configured to detect a frame after the certain scene change and the next frame when an interval between the certain scene change detected by the scene change detecting unit is shorter than a predetermined interval. 3. The video signal reproducing apparatus according to claim 1, wherein the frame before the scene change is determined as a frame that should not be thinned out.

The image signal reproducing speed adjusting means, by changing the display time per frame, any one of claims 1, characterized in that the frame rate changing means for changing the frame rate of the image signal 3 The video signal reproducing device described in 1.

The image signal reproducing speed adjusting means, and the feature that it is a non-output frame determining means for decimated frame thinning means determines add more frames to thinning in addition to the determined frames to thinning of the key frame determining unit It claims 1 to to video signal reproducing apparatus according to any one of 3.

The image signal reproducing speed adjusting means, in order to slow down the playback speed, claims 1, characterized in that a frame interpolation means for inserting interpolated frame of the image signal according to any one of 3 Video signal playback device.

The image signal reproduction speed adjusting means is
And a non-output frame determination means for adding determining further frames to thinning in addition to the frame to thinning determined by the key frame determining unit,
In order to slow down the reproduction speed, it has a frame interpolation means for inserting and interpolating frames at predetermined intervals in the image signal,
Or to adjust the playback speed of the image signal using either the frame interpolation unit and the non-output frame determining means, claims 1, characterized in that it is switchable in accordance with the reproduction speed requested from the outside 4. The video signal reproducing apparatus according to any one of items 3 .

The audio signal reproducing speed adjusting means according to any one of the claims 1 to characterized in that it has a voice pitch change means to change the pitch of the audio signal after had thinning the voice thinning means 7 Video signal playback device.