Motion picture playback apparatus and motion picture playback method

• US 7,221,852 B2
• Filed: 05/03/2002
• Issued: 05/22/2007
• Est. Priority Date: 05/10/2001
• Status: Expired due to Fees

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Iwase, Hiroyuki, Iizuka, Akira, Shuto, Kazuhiko
• Primary Examiner(s): Tran; Thai Q.
• Assistant Examiner(s): TOPGYAL, GELEK W
• Application Number:
  US10/138,400
• Publication Number:
  US 20020168176A1
• Time in Patent Office: 1,845 Days
• Field of Search: 386/68, 386/69, 386/70, 386/95, 434/307.A, 434/318
• US Class Current: 386/248
• CPC Class Codes: G06F 16/40 of multimedia data, e.g. slideshows comprising image and additional audio data retrieval of still image data G06F16/50; retrieval of audio data G06F16/60; retrieval of video data G06F16/70
• CPC Class Codes: G06F 16/489 using time information
• CPC Class Codes: G10H 1/40 Rhythm
• CPC Class Codes: G10H 2210/391 Automatic tempo adjustment, correction or control
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/2587 Laser Discs; Optical disc using analog recording
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel

Abstract

The present invention is directed to a motion-picture time scale control instruction system for time-controlled playback of motion picture in accordance with a time-scale control signal. In accordance with the preferred embodiment, during playback of motion-picture data, the CPU of the system outputs to a time-scale control section a time-scale control signal corresponding to a tempo of a piece of music output from a tempo detection mechanism. The time-scale control section adjusts the playback speed of motion-picture data in accordance with the time-scale control signal. The motion-picture playback section reads the motion-picture data from a dedicated RAM while increasing or decreasing the read-out time for each unit of data in accordance with the adjusted playback speed, and outputs the read motion-picture data to the display. On the basis of the timing set information, the system can read the motion-picture data in synchronism with the specific music performance timing, and output the read motion-picture data to the display in synchronism with the played music.

Claims

1. A motion picture playback apparatus which plays back motion-picture data which are stored in a motion-picture data memory and represent a motion picture, and displays the motion picture on a display device, the motion picture playback apparatus comprising:

an input circuit for receiving tempo information representing a tempo of a piece of music during playback of motion-picture data, the tempo information being one of MIDI tempo clock and MIDI time code;

a tempo value generator for generating a tempo value in accordance with the time intervals of the received tempo information; and

a playback control circuit for reading the motion-picture data from the motion-picture data memory at a read-out speed corresponding to the tempo value and for outputting the read-out motion-picture data to the display device.

2. A motion picture playback apparatus according to claim 1, wherein the playback control circuit comprises:

a control signal generation section for generating a playback speed control signal for controlling the playback speed of the motion-picture data in accordance with the received tempo information; and

a motion-picture data read out section for reading the motion-picture data from the motion-picture data memory at a read-out rate which defines a read-out time for a unit of data and which is changed by the generated playback speed control signal.

3. A motion picture playback apparatus according to claim 1, further comprising an operation element which is operated by a user to designate a tempo of the piece of music, wherein the input circuit receives an operated position of the operation element as tempo information.

4. A motion picture playback apparatus according to claim 1, further comprising a mixing circuit for mixing the motion-picture data read out by the playback control circuit with separately-input motion-picture data and for outputting the mixed data to the display device.

5. A motion picture playback apparatus which plays back a series of motion-picture data sets which are stored in a motion-picture data memory and represent a motion picture, and displays the motion picture on a display device, the motion picture playback apparatus comprising:

a timing designation circuit for outputting timing set information for designating at least two points among a series of music data sets and at least two points among the series of motion-picture data sets for synchronizing playback timings of the at least two points among the series of music data sets with playback timings of the at least two points among the series of motion-picture data sets; and

a playback control circuit for controlling, on the basis of the output timing set information, the timing of reading-out of the motion-picture data from the motion-picture data memory in such a maimer that the play back timings of the at least two points among the series of music data sets coincide with the playback timings of the at least two points among the series of motion-picture data sets, and for outputting the read-out motion-picture data to the display device.

6. A motion picture playback apparatus according to claim 5, further comprising a mixing circuit for mixing the motion-picture data read out by the playback control circuit with separately-input motion-picture data and for outputting the mixed data to the display device.

7. A motion picture playback method for playing back motion-picture data which are stored in a motion-picture data memory and represent a motion picture, and displaying the motion picture on a display device, the motion picture playback method comprising:

an input step for receiving tempo information representing a tempo of a piece of music during playback of motion-picture data, the tempo information being one of MIDI tempo clock and MIDI time codes;

a generating step of generating a tempo value in accordance with the time intervals of the received tempo information; and

a playback control step for reading the motion-picture data from the motion-picture data memory at a read-out speed corresponding to the tempo value and for outputting the read-out motion-picture data to the display device.

8. A motion picture playback method according to claim 7, wherein the playback control step comprises:

a control signal generation step for generating a playback speed control signal for controlling the playback speed of the motion-picture data in accordance with the received tempo information; and

a read out step for reading the motion-picture data from the motion-picture data memory at a read-out rate which defines a read-out time for a unit of data and which is changed by the generated playback speed control signal.

9. A motion picture playback method according to claim 7, wherein the input step receives, as tempo information, an operated position of an operation element which is operated by a user to designate a tempo of the piece of music.

10. A motion picture playback method according to claim 7, further comprising a mixing step for mixing the motion-picture data read out by the playback control step with separately-input motion-picture data and for outputting the mixed data to the display device.

11. A motion picture playback apparatus for playing back a series of motion-picture data sets which are stored in a motion-picture data memory and represent a motion picture, and for displaying the motion picture on a display device, the motion picture playback method comprising:

a timing designation step for outputting timing set information for designating at least two points among a series of music data sets and at least two points among the series of motion-picture data sets for synchronizing playback timings of the at least two points among the series of music data sets with playback timings of the at least two points among the series of motion-picture data sets; and

a playback control step for controlling, on the basis of the output timing set information, the timing of reading-out of the motion-picture data from the motion-picture data memory in such a maimer that the playback timings of the at least two points among the series of music data sets coincide with the playback timings of the at least two points among the series of motion-picture data sets, and for outputting the read-out motion-picture data to the display device.

12. A motion picture playback method according to claim 11, further comprising a mixing circuit for mixing the motion-picture data read out by the playback control step with separately-input motion-picture data and for outputting the mixed data to the display device.