Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-05-15
2001-08-14
Garber, Wendy R. (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000, C358S908000
Reexamination Certificate
active
06275646
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a video recording/reproducing apparatus and more specifically, to a video recording/reproducing apparatus for recording and reproducing television broadcasting signals and distinguishing commercial message portions and program content portions in a broadcasting program.
A video recording/reproducing apparatus is known which distinguishes commercial message portions from program content portions from television broadcasting signals when the television broadcasting signals are recorded, and records the program content portions by omitting the commercial message portions. Video recording/reproducing apparatuses of this kind include a bilingual broadcasting mode judgement system described in JP-A-3-158086 and a stereophonic broadcasting mode judgement system described in JP-A-3-262287, for example.
Since the commercial messages are broadcasted by the stereophonic broadcasting in the system described in JP-A-3-158086, this system judges the bilingual broadcasting mode contained in audio signals of television broadcasting, distinguishes the program content portions of the bilingual broadcasting mode from the commercial message portions of the stereophonic broadcasting mode, automatically omits only the commercial message (CM) portions and records the program content portions of the bilingual broadcasting mode.
On the other hand, the system described in JP-A-3-262287 judges the stereophonic broadcasting mode contained in the audio signals of television broadcasting, distinguishes the program content portions of the stereophonic broadcasting mode from the commercial message portions of the monaural broadcasting mode, automatically omits only the commercial message portions and records the program content portions of the stereophonic broadcasting mode.
In the systems according to the prior art described above, however, automatic omission of the CM portions cannot be effected in the bilingual broadcasting mode judgement system when the program content portions are the monaural broadcasting program and the stereophonic broadcasting program. In the stereophonic broadcasting mode judgement system, the CM is originally based on the assumption that it is broadcasted by monaural broadcasting. Therefore, if the CM itself is broadcasted by stereophonic broadcasting, it cannot be distinguished from the stereophonic broadcasting programs.
Therefore, the conventional systems intend to distinguish two kinds of program contents from the difference of the broadcasting modes of bilingual broadcasting, monaural broadcasting and stereophonic broadcasting. For this reason, when the program content portions and the commercial message portions have the same broadcasting mode, they cannot be distinguished from one another.
Particularly recently, bilingual broadcasting and stereophonic broadcasting have been employed for the program content portions, too, not only for picture programs but also for ordinary programs such as music programs, sports programs, drama programs, and so forth. Therefore, the possibility drops that the prior art system can omit only the commercial message portions, and these systems have become of no practical use.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a video recording/reproducing apparatus which can distinguish commercial message portions even in the same broadcasting mode.
In a video recording/reproducing apparatus including recording/reproducing means for recording television broadcasting signals to a recording medium and reproducing the broadcasting signals from the recording medium, the object of the present invention described above can be accomplished by a video recording/reproducing apparatus which comprises audio-free portion detection means for detecting audio-free portions from audio signals in television broadcasting signals when the television broadcasting signals are recorded by the recording/reproducing means, commercial message portion detection means for detecting commercial message portions in the television broadcasting signals by the time intervals among a plurality of the audio-free portions detected by the audio-free portion detection means, memory means for storing information of recording positions of the commercial message portions detected by the commercial message portion detection means to the recording medium, and control means for controlling reproduction from the recording medium at the time of reproduction of the television broadcasting signals from the recording medium by the recording/reproducing means, on the basis of the information of the recording positions of the commercial message portions stored in the memory means to the recording medium, so that reproduction can be carried out while the commercial message portions are skipped, at the recording positions of the commercial message portions to the recording medium.
Preferably, the video recording/reproducing apparatus described above further comprises video signal detection means for detecting changing points of video signals from the video signals in the television broadcasting signals at the time of recording of the television broadcasting signals by the recording/reproducing means, wherein the commercial message portion detection means detects the commercial message portions in the television broadcasting signals on the basis of the time intervals among a plurality of audio-free portions and the time intervals of the changing points of a plurality of video signals detected by the audio-free portion detection means and the video signal detection means, respectively.
In the video recording/reproducing apparatus described above, the commercial message portion detection means preferably detects the point at which the video signal level changes to a black level as the changing point of the video signal.
In the video recording/reproducing apparatus described above, the commercial message portion detection means preferably detects the point at which the video signal level changes to a white level as the changing point of the video signal.
In the video recording/reproducing apparatus described above, the commercial message portion detection means preferably detects the point at which the video signal level greatly changes as the changing point of the video signal.
In the video recording/reproducing apparatus described above, the memory means preferably comprises a semiconductor memory.
In the video recording/reproducing apparatus described above, the memory means preferably comprises the recording medium to which the television broadcasting signals are recorded by the recording/reproducing means.
In the video recording/reproducing apparatus described above, the information of the recording position of the commercial message portion, which is stored in the recording medium by the memory means, is preferably stored at the leading position of the recording medium.
In the video recording/reproducing apparatus described above, the information of the recording position of the commercial message portion stored to the recording medium by the memory means to the recording medium is preferably stored at the leading positions of a plurality of television signals to be recorded to the recording medium, respectively.
In the video recording/reproducing apparatus described above, the information of the recording position of the commercial message portion stored to the recording medium by the memory means is preferably stored at the leading position and the end position of the commercial message portion contained in each of a plurality of television signals recorded to the recording medium.
In the video recording/reproducing apparatus described above, the apparatus further comprises mode judgement means for detecting the commercial message portions in the television broadcasting signals at the time of recording of the television broadcasting signals by the recording/reproducing means, on the basis of the difference of broadcasting modes between program content portions of the television broadcasting signals and t
Kijima Masayuki
Nishijima Hideo
Okamoto Kaneyuki
Tada Yukinobu
Boccio Vincent F.
Crowell & Moring LLP
Garber Wendy R.
Hitachi , Ltd.
LandOfFree
Image recording/reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image recording/reproducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image recording/reproducing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2513861