US 6,477,313 B1 · Disc control method and disc control unit

Abstract

A video/audio data coding circuit receives video/audio signals and compresses and multiplexes them. A recording signal processing circuit shuffles the audio/video data, adds ECCs, and codes them for recording. A CPU control circuit controls a control ECC block addition circuit to generate control ECC blocks and sends them to the recording signal processing circuit. At the same time, the CPU control circuit controls an optical head and a spindle motor. The data is written onto a disc by the optical head. And, after editing, the control ECC blocks are written. At playback time, the control ECC blocks are read from the disc and sent to a control ECC block playback circuit where they are played back. The CPU control circuit controls the optical head, spindle motor, and so on with the played-back control ECC blocks and commands. Video/audio data is read from the disc by the optical head. A played-back signal processing circuit decodes the data, checks for errors, and de-shuffles the data. A video/audio data decoding circuit decompresses and outputs the video/audio data.

Claims22

Dependent claims

A disc control method for recording and playing back first data, second data, and control data on a disc medium, said control data being generated by a CPU (Central Processing Unit) control circuit, wherein said control data contains:

a. a number of a first data group, a sector number of the first data group, an offset block number containing second data groups synchronizing with the first data group, and a sequence number of the starting second data group within the offset block;
b. the number of a destination first data group after which first data groups to be merged, the number of first data groups to be merged, and the number of the first data group from which first data groups are to be merged, for changing a sequence of first data groups during playback;
c. the number of a destination sector after which blocks are to be inserted, the number of blocks to be inserted, and the number of the sector from which blocks are to be inserted, for changing the sequence of blocks during recording;
or
d. the number of the block containing a destination second data group after which second data groups are to be inserted, the sequence number of the destination second data group within the block, the number of second data groups to be inserted, and the number of the block from which second data groups are to be inserted, for changing the sequence of second data groups during recording, said disc control method comprising the steps of:
a. when recording data,
(i) reading the control data from the disc when the control data is on the disc;
(ii) reading edit data;
(iii) editing and recording data on the disc by referencing the control data;
and
(vi) recording the updated control data on the disc;
and
b. when playing back data,
(i) reading the control data from the disc;
(ii) playing back data from the disc according to the control data;
and
(iii) outputting the data.

14 more elements

A disc control unit for recording and playing back first data, second data, and control data on a disc medium, said control data being generated by a CPU control circuit, wherein said control data contains:

a. a number of a first data group, a sector number of the first data group, an offset block number containing second data groups synchronizing with the first data group, and a sequence number of the starting second data group within the offset block;
b. the number of a destination first data group after which first data groups to be merged, the number of first data groups to be merged, and the number of the first data group from which first data groups are to be merged, for changing a sequence of first data groups during playback;
c. the number of a destination sector after which blocks are to be inserted, the number of blocks to be inserted, and the number of the sector from which blocks are to be inserted, for changing the sequence of blocks during recording;
or
d. the number of the block containing a destination second data group after which second data groups are to be inserted, the sequence number of the destination second data group within the block, the number of second data groups to be inserted, and the number of the block from which second data groups are to be inserted, for changing the sequence of second data groups during recording, said disc control unit comprising an optical head for writing data onto the disc medium, the disc on which data is written, a data coding circuit for coding data, multiplexing data, and forming a stream, a recording signal processing circuit for shuffling, adding error correction codes, and record-coding, a control data addition circuit for generating the control data under control of the CPU control circuit, the CPU control circuit for controlling the control data addition circuit, the optical head and a spindle motor, a played-back signal processing circuit for decoding, correcting errors, and de-shuffling, a control data playback circuit for playing back the control data, a data decoding circuit for decoding data, and a processor, said processor causing said disc control unit to:
a. when recording data,
(i) read the control data from the disc when the control data is on the disc;
(ii) read edit data;
(iii) edit and record data on the disc by referencing the control data;
and
(vi) record the updated control data on the disc;
and
b. when playing back data,
(i) read the control data from the disc;
(ii) play back data from the disc according to the control data;
and
(iii) output the data.

14 more elements

A computer program product stored on a storage medium for controlling a disc control unit for recording and playing back first data, second data, and control data on a disc medium, said control data being generated by a CPU control circuit, wherein said control data contains:

a. a number of a first data group, a sector number of the first data group, an offset block number containing second data groups synchronizing with the first data group, and a sequence number of the starting second data group within the offset block;
b. the number of a destination first data group after which first data groups to be merged, the number of first data groups to be merged, and the number of the first data group from which first data groups are to be merged, for changing a sequence of first data groups during playback;
c. the number of a destination sector after which blocks are to be inserted, the number of blocks to be inserted, and the number of the sector from which blocks are to be inserted, for changing the sequence of blocks during recording;
or
d. the number of the block containing a destination second data group after which second data groups are to be inserted, the sequence number of the destination second data group within the block, the number of second data groups to be inserted, and the number of the block from which second data groups are to be inserted, for changing the sequence of second data groups during recording,
and wherein said disc control unit comprises:
an optical head for writing data onto the disc medium,
a data coding circuit for coding data, multiplexing data, and forming a stream,
a recording signal processing circuit for shuffling, adding error correction codes, and record-coding,
a control data addition circuit for generating the control data under control of the CPU control circuit,
the CPU control circuit for controlling the control data addition circuit,
a played-back signal processing circuit for decoding, correcting errors, and de-shuffling,
a control data playback circuit for playing back the control data,
and a data decoding circuit for decoding data, said program causing said disc control unit to:
a. when recording data,
(i) read the control data from the disc when the control data is on the disc;
(ii) read edit data;
(iii) edit and record data on the disc by referencing the control data;
and
(vi) record the updated control data on the disc;
and
b. when playing back data,
(i) read the control data from the disc;
(ii) play back data from the disc according to the control data;
and
(iii) output the data.

23 more elements

A disc control method for recording and playing back video data, audio data, and control ECC blocks on a disc medium, said control ECC blocks being generated by a CPU control circuit, wherein each of said control ECC blocks contains:

a. a number of a GOP (Group Of Pictures), a sector number of the GOP, an offset ECC block number containing audio frames synchronizing with the GOP, and a sequence number of the starting audio frame within the offset ECC block;
b. the number of a destination GOP after which GOPs are to be merged, the number of GOPs to be merged, and the number of the GOP from which GOPs are to be merged, for changing a sequence of GOPs during playback;
c. the number of a destination sector after which ECC blocks are to be inserted, the number of ECC blocks to be inserted, and the number of the sector from which ECC blocks are to be inserted, for changing the sequence of ECC blocks during recording;
or
d. the number of the ECC block containing a destination audio frame after which audio frames are to be inserted, the sequence number of the destination audio frame within the ECC block, the number of audio frames to be inserted, and the number of the ECC block from which audio frames are to be inserted, for changing the sequence of audio frames during recording, said disc control method comprising the steps of:
a. when recording data,
(i) reading the control ECC blocks from the disc when the control ECC blocks are on the disc;
(ii) reading edit data;
(iii) editing and recording data on the disc by referencing the control ECC blocks;
and
(vi) recording the updated control ECC blocks on the disc;
and
b. when playing back data,
(i) reading the control ECC blocks from the disc;
(ii) playing back data from the disc according to the control ECC blocks;
and
(iii) outputting the data.

14 more elements

A disc control unit for recording and playing back video data, audio data, and control ECC blocks on a disc medium, said control ECC blocks being generated by a CPU control circuit, wherein each of said control ECC blocks contains:

a. a number of a GOP, a sector number of the GOP, an offset ECC block number containing audio frames synchronizing with the GOP, and a sequence number of the starting audio frame within the offset ECC block;
b. the number of a destination GOP after which GOPs are to be merged, the number of GOPs to be merged, and the number of the GOP from which GOPs are to be merged, for changing a sequence of GOPs during playback;
c. the number of a destination sector after which ECC blocks are to be inserted, the number of ECC blocks to be inserted, and the number of the sector from which ECC blocks are to be inserted, for changing the sequence of ECC blocks during recording;
or
d. the number of the ECC block containing a destination audio frame after which audio frames are to be inserted, the sequence number of the destination audio frame within the ECC block, the number of audio frames to be inserted, and the number of the ECC block from which audio frames are to be inserted, for changing the sequence of audio frames during recording,
said disc control unit comprising an optical head for writing data onto the disc medium,
a data coding circuit for compressing data, multiplexing data, and forming a stream,
a recording signal processing circuit for shuffling, adding error correction codes, and record-coding, a control ECC block addition circuit for generating the control ECC blocks under control of the CPU control circuit,
the CPU control circuit for controlling the control ECC block addition circuit, the optical head and a spindle motor,
a played-back signal processing circuit for record-decoding, correcting errors, and de-shuffling,
a control ECC block playback circuit for playing back the control ECC blocks, and
a data decoding circuit for de-multiplexing and de-compressing data, and a processor,
said processor causing said disc control unit to:
a. when recording data,
(i) read the control ECC blocks from the disc when the control ECC blocks are on the disc;
(ii) read edit data;
(iii) edit and record data on the disc by referencing the control ECC blocks;
and
(vi) record the updated control ECC blocks on the disc;
and
b. when playing back data,
(i) read the control ECC blocks from the disc;
(ii) play back data from the disc according to the control ECC blocks;
and
(iii) output the data.

22 more elements

A computer program product stored on a storage medium for controlling a disc control unit for recording and playing back video data, audio data, and control ECC blocks on a disc medium, said control ECC blocks being generated by a CPU control circuit, wherein each of said control ECC blocks contains:

a. a number of a GOP, a sector number of the GOP, an offset ECC block number containing audio frames synchronizing with the GOP, and a sequence number of the starting audio frame within the offset ECC block;
b. the number of a destination GOP after which GOPs are to be merged, the number of GOPs to be merged, and the number of the GOP from which GOPs are to be merged, for changing a sequence of GOPs during playback;
c. the number of a destination sector after which ECC blocks are to be inserted, the number of ECC blocks to be inserted, and the number of the sector from which ECC blocks are to be inserted, for changing the sequence of ECC blocks during recording;
or
d. the number of the ECC block containing a destination audio frame after which audio frames are to be inserted, the sequence number of the destination audio frame within the ECC block, the number of audio frames to be inserted, and the number of the ECC block from which audio frames are to be inserted, for changing the sequence of audio frames during recording
and wherein said disc control unit comprises an optical head for writing data onto the disc medium,
a data coding circuit for coding data, multiplexing data, and forming a stream,
a recording signal processing circuit for shuffling, adding error correction codes, and record-coding,
a control ECC block addition circuit for generating the control ECC blocks under control of the CPU control circuit,
the CPU control circuit for controlling the control ECC block addition circuit,
a played-back signal processing circuit for decoding, correcting errors, and de-shuffling,
a control data playback circuit for playing back the control ECC blocks, and
a data decoding circuit for decoding data,
said program causing said disc control unit to:
a. when recording data,
(i) read the control ECC blocks from the disc when the control ECC blocks are on the disc;
(ii) read edit data;
(iii) edit and record data on the disc by referencing the control ECC blocks;
and
(vi) record the updated control ECC blocks on the disc;
and
b. when playing back data,
(i) read the control ECC blocks from the disc;
(ii) play back data from the disc according to the control blocks;
and
(iii) output the data.

23 more elements

Dependencies are inferred from the claim text.

Disc control method and disc control unit

Life of this patent

Disc control method and disc control unit

Life of this patent

Abstract

Claims22