Data playback apparatus

• US 7,123,815 B2
• Filed: 04/20/2001
• Issued: 10/17/2006
• Est. Priority Date: 04/21/2000
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Fujimura, Kazuya, Matsui, Yoshinori
• Primary Examiner(s): Chevalier, Robert
• Application Number:
  US09/838,174
• Publication Number:
  US 20020001261A1
• Time in Patent Office: 2,006 Days
• Field of Search: 386/94, 386/46, 386/109, 386/111, 386/112, 386/27, 386/33, 386/68, 386/124, 386/125, 386/45, 386/69, 386/70, 386/60, 386/1, 360/15
• US Class Current: 386/230
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/65 wherein solid state memory is used for storing indexing information or metadata
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/85 the recorded brightness signal occupying a frequency band totally overlapping the frequency band of the recorded chrominance signal, e.g. frequency interleaving

Abstract

The present invention relates to a data playback apparatus which efficiently performs playback or erasure of a program composed of video or audio which is stored in a memory card. A decoding unit for reading data from the memory to decode the read data retrieves an ID which matches a program ID designated by the user from a program file management data file, reads a movie data file in the folder of the designated program and decodes the read data, by referring to the relevant program information.

Claims

1. A data playback apparatus comprising:

a memory which has at least two program data folders each containing a program composed of compressively coded data including at least one video data file, and a management data folder containing management data which include information each indicating attribute information, a playback duration, and title information concerning each program;

a decoding unit for selecting at least one program data folder by referring to the management data based on playback instruction data, which are information concerning an instruction of playback of a program and which are input from outside said apparatus, reading compressively coded data which are stored in the selected program data folder, decoding the read compressively coded data, and outputting decoded data;

a display unit for displaying the decoded data;

an access information storage unit for reading/writing, from/onto said memory, at least one of number-of-access information indicating the number of times that a program was played and latest access date/time information indicating a latest time when the program was played; and

a chart creation unit for creating a chart by rearranging program data folders based on one of the number-of-access information and the latest access date/time information, and outputting the created chart to said display unit.