US5852609A
Expired / Lapsed
US
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Method and apparatus for interfacing a media independent interface with DVB-compliant modulators
Assignee: Intel Corp
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Filing: 1996-12-11
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Granted: 1998-12-22
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Expires: 2016-12-11
Abstract
Abstract A method for interfacing a media independent interface with a DVB compliant modulator includes the step of receiving nibbles of data from a media independent interface in accordance with a transmit clock signal and a holdoff signal during assertion of a transmit enable signal, wherein the nibbles of data are a portion of a variable sized packet. The nibbles of data are stored into a first buffer. The transmit clock signal is disabled. The nibbles of data are shifted out of the first buffer in accordance with a serial clock signal to provide a first bitstream. The first bitstream is framed into a predetermined packet size. The holdoff signal is asserted to halt the first bitstream. A synchronization indicator is serially inserted into the first bitstream in accordance with the serial clock signal to form a second bitstream. The second bitstream is parallelized to form parallelized data. The parallelized data and a synchronization signal corresponding to the synchronization indicator are synchronously provided in accordance with a parallel clock signal.
Inventors
- 👤 Lewis E. Adams, III
- 👤 Christopher L. Spearman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:26
CPC Classifications
H; H04; H04L; H04L47/00; H04L47/10; H04L47/22; H04L47/43; H04L47/431; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04Q2213/00; H04Q2213/13174; H04Q2213/13199; H04Q2213/13204; H04Q2213/13209; H04Q2213/13213; H04Q2213/13332; H04Q2213/13337; H04Q2213/1336
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
A method for interfacing a media independent interface with a Digital Video Broadcast (DVB) compliant modulator, comprising the steps of: a) receiving nibbles of data from the media independent interface in accordance with a transmit clock signal and a holdoff signal during assertion of a transmit enable signal, wherein the nibbles of data are a portion of a variable sized packet; b) storing the nibbles of data into a first buffer; c) disabling the transmit clock signal; d) shifting the nibbles of data out of the first buffer in accordance with a serial clock signal to provide a first bitstream; e) framing the first bitstream into a predetermined packet size; f) asserting the holdoff signal to halt the first bitstream; g) serially inserting a synchronization indicator into the first bitstream in accordance with the serial clock signal to form a second bitstream; h) parallelizing the second bitstream to provide parallelized data; i) synchronously providing the parallelized data and a synchronization signal corresponding to the synchronization indicator in accordance with a parallel clock signal.
Claim 2
Independent Claim
173 words
A method for interfacing a media independent interface with a Digital Video Broadcast (DVB) compliant modulator, comprising the steps of: a) receiving nibbles of data from the media independent interface in accordance with a transmit clock signal and a holdoff signal during assertion of a transmit enable signal, wherein the nibbles of data are a portion of a variable sized packet; b) storing the nibbles of data into a first buffer; c) disabling the transmit clock signal; d) shifting the nibbles of data out of the first buffer in accordance with a serial clock signal to provide a first bitstream; e) framing the first bitstream into a predetermined packet size; f) asserting the holdoff signal to halt the first bitstream; g) serially inserting a synchronization indicator into the first bitstream in accordance with the serial clock signal to form a second bitstream; h) parallelizing the second bitstream to provide parallelized data; i) synchronously providing the parallelized data and a synchronization signal corresponding to the synchronization indicator in accordance with a parallel clock signal.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein a nominal frequency of the transmit clock is approximately 25 MHz.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein a nominal frequency of the serial clock is approximately 38.1 MHz.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein a nominal frequency of the parallel clock is approximately one-eighth a nominal frequency of the serial clock.
Claim 6
Dependent Claim
35 words
The method of claim 1 further comprising the steps of: j) continuously inserting an idle byte into the first serial bitstream in accordance with the serial clock signal while the transmit enable signal is de-asserted.
Claim 7
Dependent Claim
22 words
The method of claim 5 wherein a value of the idle byte is distinct from a preamble of the variable sized packet.
Claim 8
Dependent Claim
43 words
The method of claim 1 further comprising the steps of: j) inserting an end of packet indicator into the first serial bitstream in accordance with the serial clock signal when the transmit enable signal transitions from an asserted state to a de-asserted state.
Claim 9
Dependent Claim
22 words
The method of claim 7 wherein the end of packet indicator is a sequence beginning with a "0" followed by fifteen "1"s.
Claim 10
Dependent Claim
47 words
The method of claim 1 further comprising the step of: j) inserting a "0" into the first serial bitstream, if the variable sized packet includes a sequence of "0" followed by sixteen "1"s, wherein the "0" is inserted into the first serial bitstream after the fifteenth "1".
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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) | 2001-12-21 | 2002-06-22 | 2002-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-21 | 2006-06-22 | 2006-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-21 | 2010-06-22 | 2010-12-22 | $7700.00 | Window Closed / Lapsed |