Inductor devices – Relatively movable coils – With core
Reexamination Certificate
1999-06-04
2003-06-03
Tran, Thai (Department: 2615)
Inductor devices
Relatively movable coils
With core
C386S349000, C348S051000
Reexamination Certificate
active
06573819
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an optical disk having a three-dimensional (3D) picture and a high definition picture stored thereon, and an apparatus for recording data to or reproducing data from the optical disk.
BACKGROUND ART
A conventionally known optical disk having a 3D moving picture stored thereon is as shown in FIG.
10
. An optical disk
201
has a picture for the right eye (right-eye picture) stored In even fields
204
,
204
a
and
204
b
and a picture for the left eye (left-eye picture) stored in odd fields
203
,
203
a
and
203
b
. The right-eye picture and the left-eye picture are recorded alternately. When the data stored on the optical disk
201
is reproduced by an existing optical disk reproduction apparatus
205
shown in
FIG. 11
, a right-eye picture and a left-eye picture appear on a TV screen
206
alternately every {fraction (1/60)} second. The naked eye recognizes only a picture in which the right-eye picture and the left-eye picture are overlapped. With 3D spectacles
207
, in which a shutter for the right-eye picture and a shutter for the left-eye picture are switched over every {fraction (1/60)} second, a 3D picture is recognized. As shown in
FIG. 12
, a right-eye picture and a left-eye picture are each encoded alternately In every other field as an interlace signal in 1 GOP of an MPEG signal.
For high definition pictures, progressive systems referred to as 525P and 720P have been studied.
A first problem of the conventional art will be described. When data in a conventional 3D optical disk is reproduced by an ordinary, conventional 2D reproduction apparatus, even a non-3D picture, i.e., even a 2D picture is not output. Data in the 3D optical disk is only reproduced by a reproduction apparatus connected to a 3D display. Accordingly, It Is required to create two types of optical disks, i.e., a 3D optical disk and a 2D optical disk for the same contents. The same is true with the high definition picture. In other words, the conventional 3D and high definition optical disks are not compatible with ordinary optical disks. A first objective of the present invention is to provide a 3D or high definition optical disk which is compatible with ordinary optical disks, and a reproduction system for the 3D or high definition optical disk.
The term “compatibility” is clearly defined as similar to the compatibility between monaural records and stereo records discussed in the past. In other words, data in a novel 3D or high resolution disk according to the present invention is output as a “monaural” vision, L.e., as a 2D picture or an ordinary resolution picture by an existing reproduction apparatus developed for DVDs or the like, and is reproduced as a “stereo” vision, i.e., a 3D picture or a high resolution picture by the novel reproduction apparatus according to the present invention.
A second problem of the conventional art concerns a synchronization system. According to a conventional synchronization system, decoding starts when decoding conditions for each compressed video signal are provided. The conventional synchronization system has problems in that, for example, when the data becomes out of synchronization for some reason during reproduction, compensation is not performed; and that audio data is not synchronized.
A second objective of-the present invention is to provide a reproduction apparatus for reproducing a plurality of compressed video signals or a plurality of compressed audio signals in synchronization with one another and performing compensation when the data becomes out of synchronization during reproduction.
DISCLOSURE OF INVENTION
The present invention includes the following means to achieve the above-described objectives.
An optical disk according to the present invention is obtained in the following manner. Two moving pictures each having a frame rate of 30 frames/sec. are input. A plurality of frames of each picture, which correspond to 1 GOP or more of the disk, are set as a picture unit. These picture units of the two pictures are arranged on the optical disk alternately as interleave blocks. Each interleave block corresponds to one rotation or more. The two moving pictures can be, for example, a picture for the right eye and a picture for the left eye; or includes field components of a progressive picture.
When such an optical disk is reproduced by an ordinary reproduction apparatus for two-dimensional (2D) display, an ordinary two-dimensional is reproduced.
A reproduction apparatus for 3D and high definition pictures according to the present invention includes means for reproducing picture identification information from an optical disk, means for reproducing a two-dimensional picture in a conventional process, means for reproducing a 3D or high definition picture, and means for outputting the 3D or high definition picture.
The present invention includes the following means to achieve the second objective.
A reproduction apparatus according to the present invention includes reference time signal generation means for generating a reference time signal; and a plurality of picture extension/reproduction means having a function of extending a compression video stream and controlling reproduction time of the extended video signal in accordance with the difference between the reference time signal and the picture reproduction time information.
Another reproduction apparatus according to the present invention includes a plurality of picture extension/reproduction means having a function of generating a reference time signal, extending a compression video stream and controlling reproduction time of the extended video signal in accordance with the difference between the reference time signal and the picture reproduction time information. The reference time signals in the plurality of picture extension/reproduction means are corrected using identical information at substantially the same time.
Still another reproduction apparatus according to the present invention includes reference time signal generation means for generating a reference time signal; and a plurality of audio extension/reproduction means having a function of extending a compression audio stream and controlling reproduction time of the extended audio signal in accordance with the difference between the-reference time signal and the audio reproduction time information.
Yet another reproduction apparatus according to the present invention controls reproduction time by changing the frequency of the clock by which the audio extension/reproduction means performs extension and reproduction.
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patent: 6208804 (2001-03-01), Ottesen et al.
patent: 6282362 (2001-08-01), Murphy et al.
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Canadian Office Action dated Mar. 17, 2000 in connection with Canadian Application No. 2,273,891.
International Search Report dated Mar. 24, 1998.
Fukuda Hideki
Ishihara Hideshi
Kawara Toshiyuki
Kitaura Hiromu
Oshima Mitsuaki
Matsushita Electric - Industrial Co., Ltd.
Onuaku Christopher
Renner Otto Boisselle & Sklar
Tran Thai
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