After-recording method and apparatus for digital recording medium and reproduction method and apparatus for the digital recording medium
AssigneeSony Corporation
InventorYasushi Fujinami
Life of this patent
Estimating the term…
Abstract
An after recording method comprising a first step of reading the original data including at least a video bit stream from a digital recording medium (1), a second step of decoding the original data, a third step of encoding audio data in synchronism with the decoding of the original data thereby to form a new audio bit stream, and a fourth step of writing the new audio bit stream in an area of the digital recording medium 1 corresponding to a time point substantially equal to the recording area of the original data. The sound after-recorded can be easily reproduced in accurate temporal agreement with the original image.
Claims20
A method of after recording in a digital recording medium, comprising step of:
- a first step of reading a bit stream from a digital recording medium;
- a second step of decoding the bit stream;
- a third step of encoding new data in synchronism with the decoding of the bit stream thereby to form a bit stream for the after recording operation;
- and
- a fourth step of writing the bit stream for after recording in a predetermined area of the digital recording medium.
An apparatus for after recording in a digital recording medium, comprising:
- read means for reading a bit stream from a digital recording medium;
- a decoder for decoding the bit stream read from the digital recording medium by the read means;
- an encoder for encoding new data thereby to form a bit stream for after recording;
- write means for writing the bit stream for after recording in the digital recording medium;
- and
- control means for controlling the write means thereby to write the bit stream for after recording encoded by the encoder in synchronism with the decoding of the bit stream by the decoder, in a predetermined area of the digital recording medium.
A method of reproducing an after-recorded digital recording medium, comprising step of:
- a first step of reading from the area of a digital recording medium for recording the addition information the information indicating the temporal correspondence between a bit stream of original data to be after recorded and a bit stream for after recording written without being multiplexed with the bit stream of the original data;
- a second step of reading the bit stream of the original data and the bit stream for after recording in synchronism with each other based on the information;
- and
- a third step of decoding the bit stream of the original data and the bit stream for after recording.
A reproduction apparatus for an after-recorded digital recording medium, comprising:
- read means for reading a bit stream from a digital recording medium;
- control means for causing the read means to read from the area of the digital recording medium for recording additional information the information indicating the temporal correspondence between the bit stream of the original data to be after recorded and the bit stream for after recording written without being multiplexed with the bit stream of the original data, and controlling the read means to read the bit stream of the original data and the bit stream of the data to be after recorded, in synchronism with each other, based on the information;
- and
- a decoder for decoding the bit stream read by the read means from the digital recording medium.
Dependencies are inferred from the claim text.