US5381275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for recording digital data with a controlled data compression ratio
Assignee: Sony Corp
•
Filing: 1993-08-06
•
Granted: 1995-01-10
•
Expires: 2013-08-06
Abstract
Abstract In step S1, the capacity of the area (remaining quantity) of a disk in which information can be recorded is read, and the remaining quantity is displayed in step S2. After a user inputs the recording time of information to be recorded and the recording capacity w for the recording, an average transmission rate R 1 is calculated from expression R 1 =w/t-α in step S4. The rate α is the transmission rate for transmitting signals other than a video signal, such as an audio signal, attached to the video signal. Data obtained by applying a DCT treatment to the video data is quantized with a quantization width corresponding to the average transmission rate R 1 and this data is intermittently recorded on the disk.
Inventors
- 👤 Hajime Nitta
- 👤 Masatoshi Takashima
- 👤 Takehiko Saito
- 👤 Tomihiro Nakagawa
- 👤 Keitaro Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:43
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B20/00; G11B20/00007; G11B20/10; G11B27/10; G11B27/19; G11B27/28; G11B27/32; G11B27/327; G11B27/329; H; H04; H04N; H04N19/00; H04N19/10; H04N19/102; H04N19/115; H04N19/124; H04N19/126; H04N19/134; H04N19/146; H04N19/149; H04N19/15; H04N19/154; H04N19/169; H04N19/184; H04N19/60; H04N19/61; H04N21/00; H04N21/40; H04N21/41; H04N21/414; H04N21/4147; H04N21/60; H04N21/63; H04N21/637; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9264; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/215; G11B2220/216; G11B2220/25; G11B2220/2525; G11B2220/2529; H04N5/765; H04N5/84; H04N5/85; H04N5/9265; H04N5/9267; H04N5/9268
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
Apparatus for recording digital data, comprising: compression means for compressing digital data in accordance with a compression ratio to produce compressed digital data; means for calculating an average transmission rate at which said compressed digital data is to be transmitted for recording on a recording medium, said average transmission rate being calculated in accordance with a quantity of information of said digital data and a remaining recording capacity of said recording medium; control means for controlling the compression ratio of said compression means in accordance with said average transmission rate; and recording means for recording said compressed digital data on said recording medium.
Claim 2
Dependent Claim
103 words
Apparatus for recording digital data, comprising: compression means for compressing digital data in accordance with a compression ratio to produce compressed digital data; means for calculating an average transmission rate at which said compressed digital data is to be transmitted for recording on a recording medium, said average transmission rate being calculated in accordance with a quantity of information of said digital data and a remaining recording capacity of said recording medium; control means for controlling the compression ratio of said compression means in accordance with said average transmission rate; and recording means for recording said compressed digital data on said recording medium.
Claim 3
Dependent Claim
26 words
The apparatus according to claim 1, wherein said recording means continuously records said compressed digital data on said recording medium at a constant average transmission rate.
Claim 4
Dependent Claim
116 words
Apparatus for recording digital data, comprising: means for calculating an average transmission rate at which digital data is to be transmitted for recording in accordance with a recording time of information to be recorded and a remaining recording capacity of a recording medium on which said information is to be recorded; compression means for compressing said digital data by quantizing said digital data in accordance with a controllable quantization width to provide compressed digital data; control means for controlling a data compression ratio of said compression means by varying the quantization width of said compression means in accordance with said average transmission rate; and recording means for recording said compressed digital data on said recording medium.
Claim 5
Dependent Claim
116 words
Apparatus for recording digital data, comprising: means for calculating an average transmission rate at which digital data is to be transmitted for recording in accordance with a recording time of information to be recorded and a remaining recording capacity of a recording medium on which said information is to be recorded; compression means for compressing said digital data by quantizing said digital data in accordance with a controllable quantization width to provide compressed digital data; control means for controlling a data compression ratio of said compression means by varying the quantization width of said compression means in accordance with said average transmission rate; and recording means for recording said compressed digital data on said recording medium.
Claim 6
Dependent Claim
37 words
The apparatus according to claim 3, wherein said compression means includes orthogonal transform means for orthogonal-transforming said digital data to provide orthogonal-transformed digital data; and said orthogonal-transformed digital data is compressed by quantizing said orthogonal-transformed digital data.
Claim 7
Dependent Claim
17 words
The recording apparatus according to claim 4, wherein said orthogonal transform means is a discrete cosine transformer.
Claim 8
Dependent Claim
95 words
Method of recording digital data, comprising the steps of: compressing digital data in accordance with a compression ratio to produce compressed digital data; calculating an average transmission rate at which said compressed digital data is to be transmitted for recording on a recording medium, said average transmission rate being calculated in accordance with a quantity of information of said digital data and a remaining recording capacity of said recording medium; controlling the compression ratio in said compressing step in accordance with said average transmission rate; and recording said compressed digital data on said recording medium.
Claim 9
Dependent Claim
95 words
Method of recording digital data, comprising the steps of: compressing digital data in accordance with a compression ratio to produce compressed digital data; calculating an average transmission rate at which said compressed digital data is to be transmitted for recording on a recording medium, said average transmission rate being calculated in accordance with a quantity of information of said digital data and a remaining recording capacity of said recording medium; controlling the compression ratio in said compressing step in accordance with said average transmission rate; and recording said compressed digital data on said recording medium.
References Cited (Backward Citations)
JPS63104259A
Cited
JPS63285769A
Cited
US5079630A
Cited
US5032927A
Cited
EP0406189A1
Cited
US5237460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |