Storage medium and apparatus and method of recording and reproducing encoded data thereto and therefrom

• US 20050008339A1
• Filed: 08/11/2004
• Published: 01/13/2005
• Est. Priority Date: 12/24/1998
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Sugahara, Takayuki, Kuroiwa, Toshio, Suzuki, Junzo
• Granted Patent: US 7,447,419 B2
• Time in Patent Office: Days
• US Class Current: 386/240
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• 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 27/329 on a disc [VTOC]
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

A writable storage medium has a first storage area divided into a plurality of sectors having the same data capacity and a second storage area. The first storage area stores at least encoded moving picture data and encoded audio data. The second storage area stores at least first information indicating whether the audio data is silence data, second information indicating an encoding method by which the audio data has been encoded at a constant bit rate and third information indicating the number of audio channels related to the audio data. The first and second storage areas may further store encoded bitmap video data and data identification information indicating whether the bitmap video data is invisible data, respectively. The first information is detected to determine whether the first audio data is silence data. If the first audio data is judged as the silence data, second audio data to be after-recorded is encoded by the encoding method the same as the method for the first audio data at the bit rate the same as that for the first audio data in response to the second and third information. The encoded second audio data is written over the first audio data. The data identification information is detected to determine whether the first bitmap video data is invisible data. Second bitmap video data to be after-recorded is encoded if the first bitmap video data is judged as the invisible data. The encoded second bitmap video data is written over the first bitmap video data.

Claims

1-16. -16. (canceled)

17. A writable storage medium comprising:

a first storage area divided into a plurality of sectors having the same data capacity;

a second storage area involved in the first storage area, storing a plurality of moving picture packs of moving picture data encoded by variable bit rate compression encoding and a plurality of audio packs of audio data encoded by constant bit rate compression encoding, the moving picture packs and the audio packs being multiplexed per pack and stored sequentially from a specific sector among the sectors, each pack corresponding to a unit of data transfer and containing data an amount of which is equal to the data capacity of each sector, and each pack being formed in a program stream defined in MPEG standards; and

a third storage area involved in the first storage area but located different from the second storage area, the third storage area storing a table listing at least first information indicating whether after-recording to the audio data is allowable, second information indicating an encoding method by which the audio data has been encoded and third information indicating the number of audio channels of the audio data.

18. A recording and reproducing apparatus comprising:

a reader to read a data table from a storage medium including a first storage area divided into a plurality of sectors having the same data capacity, a second storage area involved in the first storage area, storing a plurality of moving picture packs of moving picture data encoded by variable bit rate compression encoding and a plurality of audio packs of audio data encoded by constant bit rate compression encoding, the moving picture packs and the audio packs being multiplexed per pack and stored sequentially from a specific sector among the sectors, each pack corresponding to a unit of data transfer and containing data an amount of which is equal to the data capacity of each sector, and each pack being formed in a program stream defined in MPEG standards, and a third storage area involved in the first storage area but located different from the second storage area, the third storage area storing a table listing at least first information indicating whether after-recording to the audio data is allowable, second information indicating an encoding method by which the audio data has been encoded, and third information indicating the number of audio channels of the audio data;

a reader to read out the table stored in the third storage area of the storage medium for after-recording of audio signals;

a detector to detect the first information from the table to determine whether after-recording to the audio data stored in the second storage area of the storage medium is allowable;

an encoder, if after-recording to the audio data is judged as allowable, to encode the audio signals to be after-recorded by an encoding method the same as the method for the audio data at a bit rate the same as a bit rate for the audio data based on the second and third information on the table; and

a writer to pack audio data of the encoded audio signals for producing audio packs to be after-recorded and overwrite the packs to be after-recorded on the sectors on which the audio data has been stored in the second storage area of the storage medium.

19. A method of recording to a storage medium having a first storage area divided into a plurality of sectors having the same data capacity, the method of comprising the steps of:

packing moving picture data encoded by variable bit rate compression encoding and audio data encoded by constant bit rate compression encoding into a plurality of moving picture packs and a plurality of audio packs, each pack corresponding to a unit of data transfer and containing data an amount of which is equal to the data capacity of each sector, and each pack being formed in a program stream defined in MPEG standards;

multiplexing the moving picture packs and the audio packs per pack and recording the multiplexed packs in a second storage area involved in the first storage area of the storage medium, sequentially from a specific sector among the sectors; and

recording a table listing at least first information indicating whether after-recording to the audio data is allowable, second information indicating an encoding method by which the audio data has been encoded, a third information indicating the number of audio channels of the audio data, in a third storage area involved in the first storage area but located different from the second storage area of the storage medium.