US5337049A
Expired / Lapsed
US
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Efficient coding signal processor
Assignee: Toshiba Corp
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Filing: 1992-09-30
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Granted: 1994-08-09
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Expires: 2012-09-30
Abstract
Abstract An efficient coding signal processor for encoding information signals input in a sequence of block units in a manner of unifying an amount of information at a unit of N frames (N≧1) which includes a block activity calculator for calculating a block activity for every block of the information signals in a present frame, a frame activity calculator for calculating a frame activity from the block activity of the block in the preceding frames, a code amount allocator for allocating an amount of codes for every block in the encoding process using the predicted frame activity, and a code amount allocation controller for controlling the amount of codes to be allocated for every block up to a preselected bit rate by monitoring the amount of codes allocated by the code amount allocator for the period of one frame.
Inventors
- 👤 Kenji Shimoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/30; H03M7/40; H04; H04N; H04N11/00; H04N11/04; H04N11/042; H04N11/044; H04N19/00; H04N19/10; H04N19/102; H04N19/115; H04N19/124; H04N19/134; H04N19/136; H04N19/14; H04N19/146; H04N19/149; H04N19/15; H04N19/169; H04N19/17; H04N19/172; H04N19/176; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
148 words
A signal processor for efficiently encoding information signals input in a sequence of predetermined units, so that each of said units has a similar amount of information, comprising: first activity calculation means for calculating a first activity of a sub-unit of said information signals of a present unit; second activity calculation means for calculating a second activity from the first activity of the sub-unit calculated in a preceding unit of said information signals; code amount allocation means for providing coding that can be utilized by every sub-unit during the encoding process using the second activity; and code amount allocation control means for setting an amount of coding provided by said code amount allocation means for every sub-unit so that a preselected bit rate is not exceeded, by monitoring the amount of coding allocated by the code allocation means for the period of one unit of said information signals.
Claim 2
Dependent Claim
148 words
A signal processor for efficiently encoding information signals input in a sequence of predetermined units, so that each of said units has a similar amount of information, comprising: first activity calculation means for calculating a first activity of a sub-unit of said information signals of a present unit; second activity calculation means for calculating a second activity from the first activity of the sub-unit calculated in a preceding unit of said information signals; code amount allocation means for providing coding that can be utilized by every sub-unit during the encoding process using the second activity; and code amount allocation control means for setting an amount of coding provided by said code amount allocation means for every sub-unit so that a preselected bit rate is not exceeded, by monitoring the amount of coding allocated by the code allocation means for the period of one unit of said information signals.
Claim 3
Dependent Claim
150 words
A signal processor for efficiently encoding information signals input in a sequence of block units making up a series of frames, said signal processor encoding the information so that each unit of N frames (N≧1) includes a similar amount of data, comprising: means for calculating a block activity for every block of said information signals; means for predicting a present frame activity on the basis of a preceding frame activity; code amount allocation means for allocating an amount of codes use during the encoding of said information signals on the basis of said calculated block activity and predicted frame activity; and code amount allocation control means for setting an amount of codes that can be provided by said code amount allocation means so that a preselected bit rate is not exceeded, by monitoring the amount of codes allocated by the code amount allocation means for the period of one frame.
Claim 4
Dependent Claim
150 words
A signal processor for efficiently encoding information signals input in a sequence of block units making up a series of frames, said signal processor encoding the information so that each unit of N frames (N≧1) includes a similar amount of data, comprising: means for calculating a block activity for every block of said information signals; means for predicting a present frame activity on the basis of a preceding frame activity; code amount allocation means for allocating an amount of codes use during the encoding of said information signals on the basis of said calculated block activity and predicted frame activity; and code amount allocation control means for setting an amount of codes that can be provided by said code amount allocation means so that a preselected bit rate is not exceeded, by monitoring the amount of codes allocated by the code amount allocation means for the period of one frame.
Claim 5
Dependent Claim
30 words
A signal processor as in claim 2, wherein said code amount allocation means allocates an amount of codes on the basis of a calculated block activity of a present frame.
Claim 6
Dependent Claim
30 words
A signal processor as in claim 2, wherein said code amount allocation means allocates an amount of codes on the basis of a calculated block activity of said preceding frame.
Claim 7
Dependent Claim
126 words
A signal encoder for encoding an information signal, comprising: input means for inputting blocks of information, a predetermined number of said blocks making up one frame of said information signal; block activity calculation means for calculating an activity of every block being encoded; frame activity calculation means for calculating a present frame activity based on the block activity of a preceding frame; means for encoding said information signals by assigning predetermined codes to represent said information blocks; and means for controlling the encoding of said information signals by establishing a predetermined number of codes, for use by the encoding means, on the basis of a preceding frame activity, and adjusting an amount of said predetermined number of codes on the basis of the present frame activity.
Claim 8
Dependent Claim
126 words
A signal encoder for encoding an information signal, comprising: input means for inputting blocks of information, a predetermined number of said blocks making up one frame of said information signal; block activity calculation means for calculating an activity of every block being encoded; frame activity calculation means for calculating a present frame activity based on the block activity of a preceding frame; means for encoding said information signals by assigning predetermined codes to represent said information blocks; and means for controlling the encoding of said information signals by establishing a predetermined number of codes, for use by the encoding means, on the basis of a preceding frame activity, and adjusting an amount of said predetermined number of codes on the basis of the present frame activity.
Claim 9
Dependent Claim
14 words
A signal encoder as in claim 5 wherein said information signals are video signals.
Claim 10
Dependent Claim
19 words
A signal encoder as in claim 6 wherein said information signals include a luminance signal and color difference signals.
Claim 11
Dependent Claim
22 words
A signal encoder as in claim 5, wherein said block activity calculation means calculates the amount of information contained within each block.
Claim 12
Dependent Claim
38 words
A signal encoder as in claim 5, wherein said frame activity calculation means includes a prediction circuit for predicting the activity of a next frame along with an information signal bit amount for use by the next frame.
Claim 13
Dependent Claim
24 words
A signal encoder as in claim 5, further comprising a quantizer for reducing the bit rate of the blocks of information before being encoded.
Claim 14
Dependent Claim
23 words
A signal encoder as in claim 9, wherein said quantizer reduces said bit rate on the basis of said frame activity calculation means.
Claim 15
Dependent Claim
46 words
A signal encoder as in claim 5, wherein said encoding means converts said information signals into Huffman codes, where data having a high probability of occurrence are designated with shorter bit sequences and data having a low probability of occurrence are designated with longer bit sequences.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |