US4734768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for transmitting differential pulse code modulation (DPCM) values
Assignee: Siemens AG
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Filing: 1987-04-29
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Granted: 1988-03-29
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Expires: 2007-04-29
Abstract
Abstract A method for transmitting DPCM values provides that a plurality of successive DPCM values are converted into data words of identical, optimally-minimal length and are combined with a preamble identifying the word length, the combination being undertaken to form a data block of constant length for transmission.
Inventors
- 👤 Guenther Pexa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/30; H03M7/46; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/046
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A method for transmitting differential pulse code modulation values by conversion into data words of different lengths, comprising the steps of: Converting a plurality of successive differential pulse code modulated values into data words of identical, optimally-minimum lengths; and Combining the data words with a preamble identifying their length to form a respective data block of constant length; and Transmitting the data block.
Claim 2
Independent Claim
63 words
A method for transmitting differential pulse code modulation values by conversion into data words of different lengths, comprising the steps of: Converting a plurality of successive differential pulse code modulated values into data words of identical, optimally-minimum lengths; and Combining the data words with a preamble identifying their length to form a respective data block of constant length; and Transmitting the data block.
Claim 3
Dependent Claim
36 words
The method of claim 1, and further defined as comprising the step of: Transmitting an unused binary combination as a control signal in place of a differential pulse code modulated value converted into a data word.
Claim 4
Dependent Claim
44 words
The method of claim 1, and further defined by the step of: Forming a data block from a pulse code modulated signal value and an appertaining preamble; and Transmitting the pulse code modulated data block in place of the differential pulse code modulated values.
Claim 5
Dependent Claim
35 words
The method of claim 1, for run length coding, comprising the step of: Transmitting a plurality of differential pulse coded modulated values corresponding to the value 0 in a data block with an appertaining preamble.
Claim 6
Dependent Claim
30 words
The method of claim 1, for television transmission, and further defined by the step of: Transmitting a data block containing a synchronous word at the beginning of a television line.
Claim 7
Dependent Claim
25 words
The method claim 5, and further defined by the step of: Transmitting a predictor identifier in the data block in addition to the synchronizing word.
Claim 8
Dependent Claim
35 words
The method of claim 1, wherein the steps of combining and transmitting are further defined as: Combining a plurality of differential pulse coated modulation values and transmitting the same comprising two, three and four bits.
Claim 9
Dependent Claim
27 words
The method of claim 7, wherein the steps of combining and transmitting are further defined as: Combining and transmitting data blocks having a length of eleven bits.
Claim 10
Dependent Claim
41 words
The method of claim 8, and further comprising the steps of: Receiving the transmitted values; Converting the received data words into differential pulse code modulated values; and Reconstructing pulse code modulation signal values from the received differential pulse code modulated values.
Claim 11
Dependent Claim
24 words
The method of claim 8, and further defined as: Transmitting a block length of fourteen bits including a preamble of at least two bits.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |