Method and apparatus for recording/reproduction
AssigneePanasonic Corporation
InventorMasahiro Honjo
Life of this patent
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Abstract
The present invention provides a recording/reproduction apparatus which can record AV data at a variable rate as well as so as to enable trick plays. This recording/reproduction apparatus reads data from an HDD 8 and carries out a recording/reproduction process for the read data, and it comprises a reproduction means 10 for reading first MPEG data from the HDD 8, an analysis means 30 for obtaining positional information indicating positions of previous and subsequent GOPs of a GOP in the first MPEG data on the basis of the read first MPEG data, a navigation information addition means 6 for adding the positional information in a determined position of the first MPEG data to generate second MPEG data, and a recording means 7 for recording the second MPEG data on an optical disk 9.
Claims16
A recording/reproduction method by which data is read from a first recording medium containing first MPEG data which is divided taking a given data unit as one data group, and a recording/reproduction process for the read data is carried out, comprising:
- a reading step of reading the first MPEG data from the first recording medium;
- a decoding step of decoding the read first MPEG data to generate a decoded signal;
- a re-encoding step of re-encoding the decoded signal so as to make the amount of information smaller than that of the first MPEG data, to generate second MPEG data;
- an information obtaining step of obtaining positional information which indicates positions of previous and subsequent data groups of a specific data group in the second MPEG data with respect to said specific data group, on the basis of the second MPEG data;
- an information addition step of adding the positional information at a determined position in the second MPEG data, to generate third MPEG data;
- and
- a recording step of recording the third MPEG data on a second recording medium, wherein
- in the reading step, the first MPEG data is read at a speed which is higher than a real time reproduction speed at which the first MPEG data is normally decoded and displayed, and
- in the recording step, the second MPEG data is written on the second recording medium at a speed which is higher than a real time reproduction speed at which the second MPEG data is normally decoded and displayed.
A recording/reproduction method by which data is read from a first recording medium containing first MPEG data which is divided taking a given data unit as one data group, and a recording/reproduction process for the read data is carried out, comprising:
- a reading step of reading the first MPEG data from the first recording medium;
- a decoding step of decoding the read first MPEG data to generate a decoded signal;
- a re-encoding step of re-encoding the decoded signal so as to make the amount of information smaller than that of the first MPEG data, to generate second MPEG data;
- an information obtaining step of obtaining positional information which indicates positions of previous and subsequent data groups of a specific data group in the second MPEG data with respect to said specific data group, on the basis of the second MPEG data;
- an information addition step of adding the positional information at a determined position in the second MPEG data, to generate third MPEG data;
- and
- a recording step of recording the third MPEG data on a second recording medium, wherein
- in the decoding step, only video data included in the first MPEG data is decoded to generate a decoded video signal;
- in the re-encoding step, the decoded video signal is re-encoded to generate re-encoded video data, and the re-encoded video data is multiplexed with delayed audio data which is obtained by delaying audio data included in the first MPEG data, thereby generating multiplexed data;
- and
- in the recording step, the multiplexed data is recorded as the second MPEG data.
A recording/reproduction method by which data is read from a first recording medium containing first MPEG data which is divided taking a given data unit as one data group, and a recording/reproduction process for the read data is carried out, comprising:
- a reading step of reading the first MPEG data from the first recording medium;
- a decoding step of decoding the read first MPEG data to generate a decoded signal;
- a re-encoding step of re-encoding the decoded signal so as to make the amount of information smaller than that of the first MPEG data, to generate second MPEG data;
- an information obtaining step of obtaining positional information which indicates positions of previous and subsequent data groups of a specific data group in the second MPEG data with respect to said specific data group, on the basis of the second MPEG data;
- an information addition step of adding the positional information at a determined position in the second MPEG data, to generate third MPEG data;
- and
- a recording step of recording the third MPEG data on a second recording medium, wherein
- in the re-encoding step,
- one of data processings:
- a data insertion processing for inserting external audio data which is obtained by coding an audio signal from outside, into the second MPEG data;
- a data replacement processing for replacing the external audio data with audio data in the second MPEG data;
- and
- a data composition processing for composing the external audio data with the audio data in the second MPEG data, is performed.
Dependencies are inferred from the claim text.