US5926232A
Expired / Lapsed
US
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Method for optimizing the transmission of signals
Assignee: Robert Bosch GmbH
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Filing: 1996-10-28
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Granted: 1999-07-20
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Expires: 2016-10-28
Abstract
Abstract In a method for optimizing the transmission of signals, especially video signals, over a channel with a predetermined channel data rate after source encoding for data reduction and channel encoding, in which redundancy is added to the source-encoded signals for error control protection, at least one quality parameter of the transmitted and decoded signals is measured. As a function of the measured quality parameter, the relationship between the source accuracy of the source encoding and the added redundancy is changed in opposite directions to optimize the transmission.
Inventors
- 👤 Peter Mangold
- 👤 Rodolfo Mann Pelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:15
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/102; H04N19/103; H04N19/107; H04L; H04L1/00; H04L1/0001; H04L1/0009; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
Method for optimizing the transmission of signals, over a channel with a predetermined channel data rate after source encoding for data reduction and channel encoding, in which redundancy is added to the source-encoded signals for error control protection, said method comprising: measuring at least one quality parameter of the transmitted and decoded signals, and changing as a function of the measured quality parameter, the relationship between the source accuracy of the source encoding and the added redundancy in opposite directions to optimize the transmission.
Claim 2
Dependent Claim
84 words
Method for optimizing the transmission of signals, over a channel with a predetermined channel data rate after source encoding for data reduction and channel encoding, in which redundancy is added to the source-encoded signals for error control protection, said method comprising: measuring at least one quality parameter of the transmitted and decoded signals, and changing as a function of the measured quality parameter, the relationship between the source accuracy of the source encoding and the added redundancy in opposite directions to optimize the transmission.
Claim 3
Dependent Claim
33 words
Method according to claim 1, wherein the relationship between the source accuracy of the source encoding and the added redundancy also depends on quality indicators pertaining to the source information to be encoded.
Claim 4
Dependent Claim
32 words
Method according to claim 1, wherein the measured quality parameter is transmitted over a channel going in the opposite direction to a device which controls the source encoding and the channel encoding.
Claim 5
Dependent Claim
39 words
Method according to claim 1, wherein the measured quality parameter is used to change, in opposite directions, the relationship between the source accuracy of the source encoding and the added redundancy of a channel going in the opposite direction.
Claim 6
Dependent Claim
39 words
Method according to claim 1, wherein the source accuracy and the redundancy can be changed in a stepwise manner, and in that the change is carried out as a function of the measured quality parameter in an iteration process.
Claim 7
Dependent Claim
21 words
Method according to claim 1, wherein the channel is a mobile radio channel with a channel data rate of 32 kilobits/second.
Claim 8
Dependent Claim
23 words
Method according to claim 1, wherein the residual error rate found at the output of the channel decoder serves as the quality parameter.
Claim 9
Dependent Claim
81 words
Method according to claim 7, wherein the residual error rate is determined in that reliability information is obtained during the channel decoding of the transmitted signal; in that the reliability information is averaged over the short term; in that the short term average reliability information is mapped to detect residual error; in that the variable obtained by mapping is compared with at least one decision threshold; and in that the result of the comparison is transmitted as the residual error information.
Claim 10
Dependent Claim
21 words
Method according to claim 8, wherein the short-term averaging is done over one block of the channel-decoded signals in each case.
Claim 11
Dependent Claim
68 words
Method according to claim 8, wherein the reliability information is also averaged over the long term; in that the variable obtained by the mapping step is modified by the long-term average reliability information; and in that the modification is carried out by multiplying the variable obtained by the mapping step by an additional variable obtained by the mapping of the long-term average reliability information to detect residual error.
Claim 12
Dependent Claim
35 words
Method according to one of claim 9, wherein the long-term average reliability information is mapped to detect residual error by means of a decreasing function which has a negative discontinuity in the middle value range.
Claim 13
Dependent Claim
26 words
Method according to claim 10, wherein the mapping of the averaged reliability information to detect errors is carried out by means of a continuously decreasing function.
Claim 14
Dependent Claim
13 words
Method according to claim 12, wherein the continuously decreasing function is a polynomial.
Claim 15
Dependent Claim
12 words
Method according to claim 1, wherein said signal is a video signal.
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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) | 2002-07-19 | 2003-01-18 | 2003-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-19 | 2007-01-18 | 2007-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-19 | 2011-01-18 | 2011-07-20 | $7700.00 | Window Closed / Lapsed |