Data structure of stream data, and recording and playback method thereof

• US 6,456,783 B1
• Filed: 01/08/2001
• Issued: 09/24/2002
• Est. Priority Date: 05/07/1999
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ando, Hideo, Mimura, Hideki
• Primary Examiner(s): Chevalier, Robert
• Application Number:
  US09/755,144
• Time in Patent Office: 624 Days
• Field of Search: H04/N.585, H04/N.590, H04/N.726, 386/95, 386/1, 386/6, 386/21, 386/27, 386/33, 386/109, 386/111, 386/112, 386/45, 386/68, 386/70, 386/106, 386/105, 386/113, 386/125, 386/124, 386/126
• US Class Current: 386/330
• CPC Class Codes: G11B 20/12 Formatting, e.g. arrangement of data block or words on the record carriers within interface between computers and data recorders G06F3/06
• 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 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: H04N 21/23608 Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/43072 of multiple content streams on the same device
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/4344 Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/4363 Adapting the video stream to a specific local network, e.g. a Bluetooth® network
• CPC Class Codes: H04N 21/4381 Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/440209 for formatting on an optical medium, e.g. DVD
• 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 9/8227 the additional signal being at least another television signal

Abstract

Stream object SOB is made up of one or more stream packs S_PCK, each of which is made up of a pack header and stream packet S_PKT. The pack header includes predetermined time information SCR, and the stream packet includes one or more application packets AP_PKT appended with predetermined time stamps ATS. The application packet which is input to a streamer upon recording such stream object is time-stamped by a local reference clock corresponding to the predetermined time information.

Claims

1. A data structure comprising a set of one or more stream objects that represent playback data for a recorded bitstream, said set of one or more stream objects constituting stream data, wherein

the stream object is formed of a pack header and stream packet,

the pack header includes predetermined time information,

the stream packet includes one or more application packets assigned with given time stamps,

the application packet which is incoming during recording of the stream object is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack, and

the stream packet has an application header, and the application header includes position information of a first time stamp recorded in the stream packet.

2. A data structure comprising a set of one or more stream objects that represent playback data for a recorded bitstream, said set of one or more stream objects constituting stream data, wherein

the stream object is formed of a pack header and stream packet,

the pack header includes predetermined time information,

the stream packet includes one or more application packets assigned with given time stamps,

the application packet which is incoming during recording of the stream object is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack,

the stream object includes information of a stream cell, and

arrival time information of the application packet for the stream cell is interlocked with a value of the time stamp information recorded in the stream pack, and the time stamp information value is set in correspondence with the time information in the stream pack.

3. A data structure comprising a set of one or more stream objects that represent playback data for a recorded bitstream, said set of one or more stream objects constituting stream data, wherein

the stream object is formed of a pack header and stream packet,

the pack header includes predetermined time information,

the stream packet includes one or more application packets assigned with given time stamps,

the application packet which is incoming during recording of the stream object is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack, and

arrival time information of the application packet for the stream object is interlocked with a value of the time stamp information recorded in the stream pack, and the time stamp information value is set in correspondence with the time information in the stream pack.

4. A stream data recording method wherein

a set of one or more stream objects that represent playback data for a recorded bitstream constitutes stream data,

the stream object is formed of one or more stream packs,

the stream pack is formed of a pack header and stream packet,

the pack header includes predetermined time information, and

the stream packet includes one or more application packets assigned with given time stamps,

the application packet includes one or more application packets assigned with give time stamps,

the application packet which is incoming during recording of the stream object on an information medium is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack, and

arrival time information of the application packet for the stream object is computed on the basis of time stamp information of the local reference clock, and the computed arrival time information is recorded as navigation data.

5. A recording method according to claim 4, wherein the application packet is recorded while being appended with a time stamp of the local reference clock, and a prescribed time map entry is generated as a navigation data.

6. A stream data recording method wherein

a set of one or more stream objects that represent playback data for a recorded bitstream constitutes stream data,

the stream object is formed of one or more stream packs,

the stream pack is formed of a pack header and stream packet,

the pack header includes predetermined time information, and

the stream packet includes one or more application packets assigned with given time stamps,

the application packet includes one or more application packets assigned with give time stamps,

the application packet which is incoming during recording of the stream object on an information medium is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack, and

the stream object includes information of a stream cell, and arrival time information of the application packet for the stream cell is computed and the computed arrival time information is recorded as navigation data.

7. A recording method according to claim 6, wherein the application packet is recorded while being appended with a time stamp of the local reference clock, and a prescribed time map entry is generated as a navigation data.

8. A method of playing back recorded information from an information medium on which stream objects are recorded in a format in which a set of one or more stream objects that represent playback data for a recorded bitstream constitutes stream data, the stream object is formed of one or more stream packs, the stream pack is formed of a pack header and stream packet, the pack header includes predetermined time information, the stream packet includes one or more application packets assigned with given time stamps, and incoming application packet is time-stamped by a local reference clock corresponding to the predetermined time information, and information of the time stamp is recorded in the stream pack, wherein

a playback reference clock is set on the basis of the local reference clock played back from the information medium,

contents of the bitstream are played back from the information medium on the basis of the set playback reference clock, and

the stream packet has an application header, and the application header includes position information of a first time stamp recorded in the stream packet.

9. A memory for recording bitstream information with data structure which comprises a set of one or more stream objects that represent playback data for a recorded bitstream, said set of one or more stream objects constituting stream data, wherein

the stream object is formed of one or more stream packs,

the stream pack is formed of a pack header and stream packet, the pack header includes predetermined time information,

the stream packet includes one or more application packets assigned with give time stamps,

the application packet which is incoming during recording of the stream object is time-stamped by a local reference clock corresponding to the predetermined time information,

information of the time stamp is recorded in the stream pack, and

the stream packet has an application header, and the application header includes position information of a first time stamp recorded in the stream packet.

10. A memory according to claim 9, wherein the stream object includes information of a stream cell, arrival time information of the application packet for the stream cell is interlocked with a value of the time stamp information recorded in the stream pack, and the time stamp information value is set in correspondence with the time information in the stream pack.

11. A memory according to claim 9, wherein arrival time information of the application packet for the stream object is interlocked with a value of the time stamp information recorded in the stream pack, and the time stamp information in the stream pack.

12. A method for recording bitstream information in the memory according to claim 9.

13. A method for reproducing the recorded bitstream from the memory according to claim 9.