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US 7,606,472 B2Granted
Video stream data recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorHideta Nishizawa
Life of this patent
Estimating the term…
Abstract
A recording apparatus which effects recording after performing padding an area between an end position of AV data and the end position of a sector, with NULL packet data having no image information, no speech information, and no system information, which are specified by the MPEG standard so that a decoder does not perform decoding reproducing operation even if the area transferred to the decoder in the case where the end position of the effective AV data of an MPEG stream at a stop point of recording finish does not correspond to the end of the sector which is a unit of disk reading and-writing access, when the MPEG2 stream data is recorded on a disk-shaped recording medium.
Claims8
An apparatus for recording image data comprising:
- a recording unit which records the image data encoded by a predetermined encoding method on a recording medium as recording data having a format including a succession of fixed length packets each having a predetermined data size;
- a file management unit which manages, by a file system, recording data recorded on the recording medium;
- and
- an editing control unit which controls editing for combining first recording data and second recording data recorded on the recording medium,
- wherein the editing control unit includes:
- a first detection unit which detects an offset from an end of one of the first and second recording data to a sector boundary determined depending on the recording medium;
- a first recording control unit which generates one or more dummy packets of a same size as the fixed length packet to adjust a positional relationship between the end of one of the first and second recording data and the sector boundary, and records, by the recording unit, the generated dummy packets fully into the offset detected by the first detection unit;
- a second detection unit which detects a data size of an excess portion of the dummy packets recorded by the first recording control unit, if the recorded dummy packets exceed the offset;
- and
- a second recording control unit which generates third recording data having a data size N (N being an integer) times as large as the sector size to adjust a positional relationship between the sector boundary and a packet boundary, by adding one or more newly-generated dummy packets, of the same data size as the fixed length packet in accordance with the file system, to the dummy packets of the data size detected by the second detection unit, and records the generated third recording data by the recording unit so that the generated third recording data is combined with said first and second recording data recorded on the recording medium,
- wherein the file management unit registers, in the file system, recording data combining information on the basis of a result of the editing, so that information of the first recording data, information of the second recording data, information of the dummy packets recorded by the first recording control unit, and information of the third recording data recorded by the second recording control unit are registered in the file system.
8 more elements
An apparatus for recording image data comprising:
- a recording unit which records a transport stream encoded by an MPEG encoding method on a disk-shaped recording medium as recording data having a format including a succession of fixed length packets each having a predetermined data size;
- a file management unit which manages, by a file system, recording data recorded on the disk-shaped recording medium and
- an editing control unit which controls editing for combining first recording data and second recording data recorded on the disk-shaped recording medium,
- wherein the editing control unit includes:
- a first detection unit which detects an offset from an end of one of the first and second recording data to a sector boundary determined depending on the recording medium;
- a first recording control unit which generates one or more dummy packets of a same size as the fixed length packet to adjust a positional relationship between the end of one of the first and second recording data and the sector boundary and records, by the recording unit, the generated dummy packets fully into the offset detected by the first detection unit;
- a second detection unit which detects a data size of an excess portion of the dummy packets recorded by the first recording control unit, if the recorded dummy packets exceed the offset;
- and
- a second recording control unit which generates third recording data having a data size N (N being an integer) times as large as the sector size to adjust a positional relationship between the sector boundary and a packet boundary, by adding one or more newly-generated dummy packets, of the same data size as the fixed length packet in accordance with the file system, to the dummy packets of the data size detected by the second detection unit, and records the generated third recording data by the recording unit so that the generated third recording data is combined with said first and second recording data recorded on the disk-shaped recording medium,
- wherein the file management unit registers, in the file system, recording data combining information on the basis of a result of the editing, so that information of the first recording data, information of the second recording data, information of the dummy packets recorded by the first recording control unit, and information of the third recording data recorded by the second recording control unit are registered in the file system.
7 more elements
A method of recording image data comprising the steps of:
- recording data concerning image data encoded by a predetermined encoding method on a recording medium as recording data having a format including a succession of fixed length packets each having a predetermined data size;
- managing, by a file system, recording data recorded on the disk-shaped recording medium;
- and
- controlling editing for combining first recording data and second recording data recorded on the disk-shaped recording medium,
- wherein the editing control step includes:
- a first detection step of detecting an offset from an end of one of the first and second recording data to a sector boundary determined depending on the recording medium;
- a first dummy packet recording step of generating one or more dummy packets of a same size as the fixed length packet to adjust a positional relationship between the end of one of the first and second recording data and the sector boundary, and recording the generated dummy packets fully into the offset detected in the first detection step;
- a second detection step of detecting a data size of an excess portion of the dummy packets recorded in the first dummy packet recording step, if the recorded dummy packets exceed the offset;
- and
- a second dummy packet recording step of generating third recording data having a data size N (N being an integer) times as large as the sector size to adjust a positional relationship between the sector boundary and a packet boundary, by adding one or more newly-generated dummy packets, of the same data size as the fixed length packet in accordance with the file system, to the dummy packets of the data size detected in the second detection step, and recording the generated third recording data by the recording unit so that the generated third recording data is combined with said first and second recording data recorded on the disk-shaped recording medium,
- wherein the management step includes registering, in the file system, recording data combining information on the basis of a result of the editing, so that information of the first recording data, information of the second recording data, information of the dummy packets recorded in the first dummy packet recording unit, and information of the third recording data recorded in the second dummy packet recording step are registered in the file system.
8 more elements
A recording medium storing a program for causing a computer to execute, the program comprising the steps of:
- recording data concerning image data encoded by a predetermined encoding method on a recording medium as recording data having a format including a succession of fixed length packets each having a predetermined data size;
- and
- managing, by a file system, recording data recorded on the disk-shaped recording medium;
- and
- controlling editing for combining first recording data and second recording data recorded on the disk-shaped recording medium,
- wherein the editing control step includes:
- a first detection step of detecting an offset from an end of one of the first and second recording data to a sector boundary determined depending on the recording medium;
- a first dummy packet recording step of generating one or more dummy packets of a same size as the fixed length packet to adjust a positional relationship between the end of one of the first and second recording data and the sector boundary and recording the generated dummy packets fully into the offset detected in the first detection step;
- a second detection step of detecting a data size of an excess portion of the dummy packets recorded in the first dummy packet recording step, if the recorded dummy packets exceed the offset;
- and
- a second dummy packet recording step of generating third recording data having a data size N (N being an integer) times as large as the sector size to adjust a positional relationship between the sector boundary and a packet boundary, by adding one or more newly-generated dummy packets, of the same data size as that of the fixed length packet in accordance with the file system, to the dummy packets of the data size detected in the second detection step, and recording the generated third recording data by the recording unit so that the generated third recording data is combined with said first and second recording data recorded on the disk-shaped recording medium,
- wherein the management step includes registering, in the file system, recording data combining information on the basis of a result of the editing, so that information of the first recording data, information of the second recording data, information of the dummy packets recorded in the first dummy packet recording unit, and information of the third recording data recorded in the second dummy packet recording step are registered in the file system.
9 more elements
Dependencies are inferred from the claim text.