Playback apparatus, program, and playback method

a technology of video output and playback method, which is applied in the direction of read-only discs, television systems, instruments, etc., can solve the problems of user complaints about products, disordered display or interruption of monitors,

US20120224829A1Inactive Publication Date: 2012-09-06PANASONIC CORP
1 Cites 3 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2012-09-06
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A playback apparatus including: a Clip information read circuit 5 that reads supplementary information from a recording medium 1, which also includes a video signal, and judges based on the supplementary information whether the video signal is of a first frame frequency or of a second frame frequency; a mode setting unit 13 that sets either a continuation or non-continuation mode, the continuation mode prohibiting and the non-continuation mode allowing a switch between frame frequencies during a playback; and a 24 Hz-60 Hz conversion circuit 7 and a digital modulation circuit 9 that, if the continuation mode is set, output the obtained video signal if it is of the first frame frequency, and generate a video signal of the first frame frequency by converting the obtained video signal and output the generated video signal if the obtained video signal is of the second frame frequency.
Need to check novelty before this filing date? Find Prior Art

Description

BACKGROUND OF THE INVENTION

[0001] (1) Field of the Invention

[0002] The present invention relates to a technical field of video output technology.

[0003] (2) Description of the Related Art

[0004] The video output technology is a technology for playing back video information that has been recorded on a recording medium or transferred over a transmission path, and outputting a video signal by a method that corresponds to a mode in which the playback apparatus is set.

[0005] In conventional technologies, typically a video signal of 60 frames / sec is used so that the television receivers can play back the received video signal. In recent years, however, monitors and projectors supporting the frame frequency of 24 frames / sec have been put into markets.

[0006] Such products have started to be put into markets because the video signal of 24 frames / sec is expected to be used more increasingly for the main movie provided in BD-ROM for sale, the BD-ROM being a next-generation optical disc. This is becaus...

Examples

embodiment 1

[0047]First, among various aspects of the playback apparatus of the present invention, the use form will be described. In FIG. 1, the playback apparatus of the present invention is a playback apparatus 200 which is used in a home theater system that further includes a remote controller 300, a hybrid monitor 400, and 60 Hz dedicated monitor 500.

[0048]The playback apparatus 200 reproduces a video signal recorded on an optical disc 1. The playback apparatus outputs an interlace video signal of 60 frames / sec (hereinafter referred to as “60 Hz interlace signal”) and a progressive video signal of 24 frames / sec, as video outputs. The playback apparatus has a digital output terminal, and sends these video signals to the hybrid monitor 400 and the 60 Hz dedicated monitor 500 via an HDMI connector.

[0049]The hybrid monitor 400 can display the 60 Hz interlace signal and the progressive video signal.

[0050]The 60 Hz dedicated monitor 500 can display the 60 Hz interlace signal.

[0051]Up to now, the...

embodiment 2

[0150]In Embodiment 2, it is presumed that a multi-frame monitor is used. The multi-frame monitor is a monitor that displays images at a scan frequency in accordance with an instruction provided from the playback apparatus. In Embodiment 2, the multi-frame monitor scans at 48 Hz, which is an integral multiple of 24 (frames / sec), during a video playback. The video signals recorded on films are suitable for display at 24 frames / sec as described in Embodiment 1. However, a flickering may occur during a display at 24 frames / sec. In movie theaters, the film is moved so that each frame is exposed to light twice to avoid such a flickering. Accordingly, if the playback apparatus plays back the video signal at 48 frames / sec in the present embodiment, the quality of the displayed image is close to the quality of the image displayed in the movie theater.

[0151]The following describes the internal structure of the playback apparatus in Embodiment 2. FIG. 17 shows the internal structure of the pl...

embodiment 3

[0166]In Embodiment 3, as is the case with Embodiment 2, it is presumed that a multi-frame monitor is used. The multi-frame monitor is a monitor that displays images at a scan frequency in accordance with an instruction provided from the playback apparatus. In Embodiment 3, the multi-frame monitor scans at 72 Hz, which is an integral multiple of 24 (frames / sec), during a video playback.

[0167]The following describes the internal structure of the playback apparatus in Embodiment 3. FIG. 21 shows the internal structure of the playback apparatus in Embodiment 3. FIG. 21 is based on the internal structure of the playback apparatus of Embodiment 2 shown in FIG. 17. The difference from FIG. 17 is that the 24 Hz-48 Hz conversion circuit 21 has been replaced with a 24 Hz-72 Hz conversion circuit 24. Also, with the addition or replacement of the structural elements, the displayability judging unit 11 and the switch control circuit 15 perform the following processes that are unique to Embodime...