Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-11-20
2003-09-09
Christensen, Andrew (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06618551
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an audio disc in which an audio signal of text information indicating a music name or the like is recorded, an encoding apparatus in which the audio signal of the text information is recorded in the audio disc, and a disc reproducing apparatus in which the audio signal recorded in the audio disc is reproduced to display the text information indicated by the audio signal.
2. Description of the Related Art
2.1. Previously Proposed Art
A conventional compact disc (CD) has been known as a conventional audio signal reproducing optical disc. Also, a digital video disc (DVD) has been recently known as an optical disc having a packing density higher than the CD.
Also, another conventional compact disc (CD) has been known as a storage medium in which text information (or character information) indicating a music name of each music source is recorded as an audio signal with control information. In this conventional CD, sub-codes of 8 bits such as P, Q, R, S, T, U, V and W are prepared. When text information is recorded in the conventional CD, channels of 6 bits composed of R, S, T, U, V and W are used.
2.2. First Problems to be Solved by the Invention
However, in cases where both a video signal and an audio signal are recorded in the DVD, the video signal is primarily recorded in the DVD (hereinafter, this type of DVD is called DVD-video disc), and the recording of the audio signal is subordinated to the recording of the video signal. Therefore, there are following problems.
First, the audio signal is integrally formed with the video signal, and the audio signal and the video signal are recorded as a set. Therefore, a memory capacity for the audio signal is considerably lower than that for the video signal.
Secondly, a time management for the audio signal cannot be performed independent of the video signal.
Thirdly, simple text information such as a music name cannot be read out from the DVD-video disc.
Also, because users for the audio signal require a broaden usage from the DVD-video disc as compared with users for the video signal, a simple reproducing method is required of the DVD-video disc. For example, the users for the audio signal desires to arrange an area of table-of-contents (TOC) in the DVD-video disc in the same manner as in the CD. However, in the DVD-video disc, a video contents block unit is composed of a navigation control pack (CONT pack), a plurality of video packs and a plurality of audio packs, and the reproduction of the video and audio packs is controlled by using the CONT pack. Therefore, even though the audio signal is primarily recorded in the DVD-video disc independence of the video signal, a user cannot easily reproduce the audio signal, so that there is a problem that the DVD-video disc is not very useful for the user.
Also, the time management in the DVD-video disc is performed for each video frame. Therefore, even though the audio signal is primarily recorded in the DVD-video disc independence of the video signal, because it is important to continuously reproduce the audio signal as compared with the video signal, there is a problem that it is difficult to perform a time management for the audio signal in real time.
Also, the DVD-video disc and a DVD-video disc reproducing apparatus dedicated to the DVD-video disc are put on the market. In this DVD-video disc reproducing apparatus, a signal recorded in a music CD or a video CD can be reproduced as well as a signal recorded in the DVD-video disc. However, users desire a disc reproducing apparatus in which an audio signal recorded in any type DVD can be reproduced as well as the reproduction of an audio signal primarily recorded in a DVD (hereinafter, this type of DVD is called DVD-audio disc)
2.3. Second Problems to be Solved by the Invention
Also, text information indicating contents of a music source and other information are recorded in the conventional CD by scatteringly arranging the text information and the other information in a storage region of the conventional CD. In this case, it is difficult, for example, to display the text information and the other information while the text information and the other information follow the music source reproduced and while promptly changing the text information and the other information. Therefore, there is a problem that a text indicated by a video signal cannot be effectively displayed in connection with the music source indicated by an audio signal.
In general, in cases where a dialogue (or a caption) superimposed on a moving picture such as a movie is recorded in a digital versatile disc (DVD)-video disc, text information represented by the dialogue is recorded by successively arranging the text information in a storage region of the DVD-video disc. However, because audio data such as a music source is primarily recorded in the DVD-audio disc as compared with the DVD, there is a problem that a specific storage region allocated to the audio data is considerably reduced in the DVD-audio disc in cases where text information is successively arranged in a storage region of the DVD-audio disc.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide, with due consideration to the drawbacks of such a conventional audio disc and a conventional disc reproducing apparatus, an audio disc in which an audio signal primarily recorded is easily read out without any troublesomeness, a real time management is easily performed and the audio signal is producible by using a DVD video player, and a disc reproducing apparatus in which the audio signal recorded in the audio disc is reproduced.
A second object of the present invention is to provide an audio disc in which audio data of a music source or the like is primarily recorded while effectively recording text information indicating contents of the music source or the like, an encoding apparatus in which the text information is encoded so as to effectively record the text information in the audio disc with the audio data primarily recorded, and a disc reproducing apparatus in which the text information recorded in the audio disc is effectively reproduced and displayed.
The first object is achieved by the provision of an audio disc having a data structure comprising:
a video title set;
a first managing area (VMG) including information (VMGI) for managing the video title set;
an audio title set not including a pack for reproduction control but including audio data; and
a second managing area (AMG) including information (AMGI) for managing the audio title set and managing audio contents of the video title set.
In the above configuration, because the audio title set is not managed by the information (VMGI) of the first managing area (VMG) but is managed by the information (AMGI) of the second managing area (AMG), the audio data can be recorded independent of video data of the video title set. Therefore, time of an audio signal reproduced from the audio data can be easily managed. Also, in cases where text information or still picture data is recorded in the disc, the text information or the still picture data can be easily reproduced at a predetermined time while reproducing the audio data.
Also, the first object is achieved by the provision of an audio disc reproducing apparatus for reproducing data recorded in an audio disc, of which a data structure comprises:
a video title set;
a first managing area (VMG) including information (VMGI) for managing the video title set;
an audio title set not including a pack for reproduction control but including audio data; and
a second managing area (AMG) including information (AMGI) for managing the audio title set and managing audio contents of the video title set, the audio disc reproducing apparatus comprising:
reproducing means for reproducing the audio contents of the video title set and the audio data of the audio title set by using the information of the second managing area.
In the above configuration, because the audio title set and managing audio contents of the video tit
Fuchigami Norihiko
Tanaka Yoshiaki
Ueno Shoji
Anderson Kill & Kill
Chieu Po-lin
Christensen Andrew
JVC Victor Company of Japan, Limited
Lieberstein Eugene
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