EP0866446A2
Expired / Lapsed
EP
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A disk apparatus having a single recording head and capable of simultaneous recording and reproducing
Assignee: Toshiba Corp
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Filing: 1998-03-17
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Granted: —
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Expires: 2018-03-17
Abstract
Abstract A disk apparatus comprises a buffer memory (14, 19) and a controller (20) for alternately recording onto and reproducing from an optical disk (18) in a time sharing manner. During recording onto a recording area of the optical disk, during reproducing from a reproducing area of the optical disk, and during accessing in which an optical head (17) moves between both of the areas for accessing, inputted video data is written into a buffer memory (14), video data stored in the memory (14) is read and recorded at a speed that is at least twice higher than an average bit rate, and video data recorded on the reproducing area is reproduced at a speed that is at least twice higher than an average bit rate. During reproducing and during accessing in which the optical head is moved between both areas for accessing, digital continuous data stored in the memory (19) is read and outputted, at a predetermined bit rate, to a monitor (21).
Inventors
- 👤 Kenichi c/o Kabushiki Kaisha Toshiba Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/005; G11B20/00; G11B20/10; G11B20/10527; H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/877; G11B2020/10935; G11B2020/10953; G11B2020/10962; G11B2220/00; G11B2220/20; H04N5/00; H04N5/76; H04N5/84; H04N5/85; H04N9/80; H04N9/804; H04N9/8042
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
295 words
A disk apparatus characterized by comprising: a data input/output section (11, 12, 22) for
inputting/outputting data at predetermined bit rates; a recording/reproducing section (16, 17) having a
single recording/reproducing head, for recording data
onto and reproducing data from a disk-like recording
medium; a buffer memory (14, 19) for temporarily storing
data to be recorded, and for temporarily storing data
reproduced from the recording medium; and a control section (20) for controlling recording
of data onto a recording area on the recording medium,
and reproducing of data from a reproducing area on the
recording medium, such that the recording and the
reproducing are performed alternately in a time sharing
manner, wherein the control section controls said
recording/reproducing section and said buffer memory
such that data to be recorded is written into the
buffer memory during recording onto the recording area,
during reproducing from the reproducing area, and
during accessing in which the recording/reproducing
head is moved between the recording area and the
reproducing area for accessing, data to be recorded, stored in the buffer memory,
is read and recorded onto the recording area, at a
recording speed at least twice higher than an average
bit rate of the data to be recorded, during recording
onto the recording area, data recorded on the recording area is reproduced
and written into the buffer memory, at a reproducing
speed at least twice higher than the average bit rate,
during reproducing from the reproducing area, and data to be reproduced, stored in the buffer memory
is read and outputted to a display device, at the
predetermined bit rate, during recording onto the
recording area, during reproducing from the reproducing
area, and during accessing in which the
recording/reproducing head is moved between the
recording area and the reproducing area for accessing.
Claim 2
Dependent Claim
146 words
A disk apparatus according to claim 1,
characterized in that the control section (20) sets the
recording speed at (T1 + T2 + 2S)A/T1 bps or higher and
the reproducing speed to (T1 + T2 + 2S)A/T2 bps or
higher, where T1 is an average recording time period
per one recording operation, T2 is an average
reproducing time period per one reproducing operation,
S is a maximum access time period for the recording
medium which is determined by adding a time period
required for rotating the recording medium by one
rotation, to a seek time period required for the
recording/reproducing head to move from an innermost
circumference of the recording medium to an outermost
circumference thereof, and A (bps) is the bit rate of
inputted data, when recording onto the recording area
and reproducing from the recording area are alternately
performed in the time sharing manner.
Claim 3
Dependent Claim
142 words
A disk apparatus according to claim 2,
characterized in that the memory capacity of the buffer
memory (14, 19), for storing data to be recorded and to
be reproduced, is at least (4S + T1 + T2)A bits , where
T1 is the average recording time period per one
recording operation, T2 is the average reproducing time
period per one reproducing operation, S is the maximum
access time period for the recording medium determined
by adding a time period required for rotating the
recording medium by one rotation, to the seek time
period for the recording/reproducing head to move from
an innermost circumference of the recording medium to
an outermost circumference thereof, and A (bps) is the
bit rate of inputted data, when recording onto the
recording area and reproducing from the recording area
are alternately performed in the time sharing manner.
Claim 4
Dependent Claim
32 words
A disk apparatus according to claim 2,
characterized by further comprising a display screen
(40) divided such that data being recorded onto the
recording area and data being reproduced are
simultaneously displayed.
Claim 5
Dependent Claim
145 words
A disk apparatus according to claim 1,
characterized in that the control section sets a memory
capacity of the buffer memory (14, 19), for storing
data to be recorded and reproduced, at (4S + T1 + T2)A
bits or more, where T1 is an average recording time
period per one recording operation, T2 is an average
reproducing time period per one reproducing operation,
S is a maximum access time period for the recording
medium which is determined by adding a time period for
rotating the recording medium by one rotation, to a
seek time period required for the recording/reproducing
head to move from an innermost circumference of the
recording medium to an outermost circumference thereof,
and A (bps) is the bit rate of inputted data, when
recording onto the recording area and reproducing from
the recording area are alternately performed in the
time sharing manner.
Claim 6
Dependent Claim
185 words
A disk apparatus according to claim 5,
characterized in that the control section (20) sets the
recording speed at which data is recorded onto the
recording medium, to (T1 + T2 + 2S(N + 1))A/T1 (bps) or
higher, and the reproducing speed at which data is
reproduced from the recording medium, at (T1 + T2 +
2S(N + 1))A/T2 (bps) or higher, where T1 is the average
recording time period per one recording operation, T2
is the average reproducing time period per one
reproducing operation, S seconds is the maximum access
time period for the recording medium which is
determined by adding a time period required for
rotating the recording medium by one rotation, to a
seek time period for the recording/reproducing head to
move from an innermost circumference of the recording
medium to an outermost circumference thereof, A (bps)
is the bit rate of inputted data, and N is a maximum
number of times of retries to be performed upon a
failure of seeking, when recording onto the recording
area and reproducing from the recording area are
alternately performed in the time sharing manner.
Claim 7
Dependent Claim
31 words
A disk apparatus according to claim 5,
characterized by further comprising a display screen
divided such that data being recorded onto the
recording area and data being reproduced are
simultaneously displayed.
Claim 8
Dependent Claim
185 words
A disk apparatus according to claim 1,
characterized in that the control section (20) sets the
recording speed at which data is recorded onto the
recording medium, at (T1 + T2 + 2S(N + 1))A/T1 (bps) or
higher, and the reproducing speed at which data is
reproduced from the recording medium, at (T1 + T2 +
2S(N + 1))A/T2 (bps) or higher, where T1 is an average
recording time period per one recording operation, T2
is an average reproducing time period per one
reproducing operation, S is a maximum access time
period for the recording medium which is determined by
adding a time period for rotating the recording medium
by one rotation, to a seek time period for the
recording/reproducing head to move from an innermost
circumference of the recording medium to an outermost
circumference thereof, A (bps) is the bit rate of
inputted digital continuous data, and N is a maximum
number of times of retries to be performed upon a
failure of seeking, when recording onto the recording
area and reproducing from the recording area are
alternately performed in the time sharing manner.
Claim 9
Dependent Claim
32 words
A disk apparatus according to claim 8,
characterized by further comprising a display screen
(40) divided such that data being recorded onto the
recording area and data being reproduced are
simultaneously displayed.
Claim 10
Dependent Claim
165 words
A disk apparatus according to claim 1,
characterized in that the control section (20) sets a
total of memory capacities of the buffer memory, for
storing data to be recorded and to be reproduced, to (4S(N + 1) + T1 + T2)A bits or more, where T1 is an
average recording time period per one recording
operation, T2 is an average reproducing time period per
one reproducing operation, S is a maximum access time
period for the recording medium which is determined by
adding a time period for rotating the recording medium
by one rotation, at a seek time period for moving the
recording/reproducing head from an innermost
circumference of the recording medium to an outermost
circumference thereof, A (bps) is the bit rate of
inputted data, and N is a maximum number of times of
retries to be performed upon a failure of seeking, when
recording onto the recording area and reproducing from
the recording area are alternately performed in the
time sharing manner.
Claim 11
Dependent Claim
32 words
A disk apparatus according to claim 10,
characterized by further comprising a display screen
(40) divided such that data being recorded onto the
recording area and data being reproduced are
simultaneously displayed.
Claim 12
Dependent Claim
32 words
A disk apparatus according to claim 1,
characterized by further comprising a display screen
(40) divided such that data being recorded onto the
recording area and data being reproduced are
simultaneously displayed.
Claim 13
Dependent Claim
139 words
A disk apparatus characterized by comprising: a recording/reproducing head (17) for recording
data onto and reproducing data from a disk-like
recording medium; a buffer memory (14, 19) coupled to the
recording/reproducing head for temporarily storing data
to be recorded that is substantially continuously
received over a time interval at a first bit rate, and
for temporarily storing data reproduced from the
recording medium; and a control section (20) coupled to the
recording/reproducing head and the buffer memory for
controlling recording of data onto a recording area on
the recording medium, and reproducing of data from a
reproducing area on the recording medium, to
alternately record and reproduce data in a time sharing
manner, and for reading data reproduced from the
recording medium and stored in the buffer memory for
display on an external display continuously over said
time interval.
Claim 14
Dependent Claim
61 words
The disk apparatus of claim 13, characterized
in that the control section (20) controls said
recording/reproducing head to move between the
recording area and the reproducing area for accessing,
and controls said buffer memory to write data that is
to be recorded into the buffer memory during recording
onto the recording area, during reproducing from the
reproducing area, and during accessing.
Claim 15
Dependent Claim
126 words
The disk apparatus of claim 14, characterized
in that data to be recorded, stored in the buffer
memory (14), is read and recorded onto the recording
area, at a recording speed at least twice higher than
an average bit rate of the data to be recorded, during
recording onto the recording area, data recorded on the recording area is reproduced
and written into the buffer memory (19), at a
reproducing speed at least twice higher than the
average bit rate, during reproducing from the
reproducing area, and data to be reproduced, stored in the buffer memory
(19) is read and outputted to the external display (21),
at a second bit rate, during recording onto the
recording area, during reproducing from the reproducing
area, and during accessing.
Claim 16
Dependent Claim
104 words
A disk apparatus according to claim 15,
characterized in that the control section (20) sets the
recording speed at (T1 + T2 + 2S)A/T1 bps or higher and
the reproducing speed to (T1 + T2 + 2S)A/T2 bps or
higher, where T1 is an average recording time period
per one recording operation, T2 is an average
reproducing time period per one reproducing operation,
S is a maximum access time period for the recording
medium, and A (bps) is the bit rate of inputted data,
when recording onto the recording area and reproducing
from the recording area are alternately performed in
the time sharing manner.
Claim 17
Dependent Claim
62 words
A disk apparatus according to claim 16,
characterized in that the control section (20) sets a
total memory capacity of the buffer memory, for storing
data to be recorded and to be reproduced, at (4S + T1 +
T2)A bits or more, when recording onto the recording
area and reproducing from the recording area are
alternately performed in the time sharing manner.
Claim 18
Dependent Claim
148 words
A disk apparatus according to claim 14,
characterized in that the control section (20) sets a
total memory capacity of the buffer memory (14, 19),
for storing data to be recorded and to be reproduced,
at (4S + T1 + T2)A bits or more, where T1 is an average
recording time period per one recording operation, T2
is an average reproducing time period per one
reproducing operation, S is a maximum access time
period for the recording medium which is determined by
adding a time period for rotating the recording medium
by one rotation, to a seek time period for the
recording/reproducing head to move from an innermost
circumference of the recording medium to an outermost
circumference thereof, and A (bps) is the bit rate of
inputted data, when recording onto the recording area
and reproducing from the recording area are alternately
performed in the time sharing manner.
Claim 19
Dependent Claim
102 words
A disk apparatus according to claim 18,
characterized in that the control section (20) sets the
recording speed at which data is recorded onto the
recording medium, to (T1 + T2 + 2S(N + 1))A/T1 (bps) or
higher, and the reproducing speed at which digital
continuous data is reproduced from the recording medium,
at (T1 + T2 + 2S(N + 1))A/T2 (bps) or higher, where N
is a maximum number of times of retries to be performed
upon a failure of seeking, when recording onto the
recording area and reproducing from the recording area
are alternately performed in the time sharing manner.
Claim 20
Dependent Claim
30 words
A disk apparatus according to claim 13,
characterized in that the external display (21) is
divided to simultaneously display data being recorded
onto the recording area and data being reproduced.
Claim 21
Dependent Claim
168 words
A disk apparatus characterized by comprising: a buffer memory (14, 19) for temporarily storing
data to be recorded that is continuously received from
an external data source over a first time interval at a
first bit rate, and for temporarily storing data
reproduced from a recording medium received over a
second time interval at a second bit rate, the second
bit rate being faster than the first bit rate ; and a controller (20) having a first output for
providing a control signal to an external recording and
reproducing head for controlling recording of data from
the buffer memory onto a recording area on the
recording medium, and reproducing of data from a
reproducing area on the recording medium, to
alternately record and reproduce data in a time sharing
manner, and having a second output for providing a
control signal to the buffer memory for storing data
reproduced from the recording medium and for outputting
data for display on an external display continuously
during the first time interval,
Claim 22
Dependent Claim
45 words
The disk apparatus of claim 21, characterized
in that the quantity of data received from the external
data source over the first time interval is
substantially equal to the quantity of data outputted
for display from the buffer memory (19) over the first
time interval.
References Cited (Backward Citations)
No citation records indexed.
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