1. A method of determining a frequency offset between a carrier frequency and a receiver frequency on a device for coherent integration of an ultra-wideband (UWB) probe signal, comprising:
receiving, at a receiver operating at the receiver frequency, a UWB probe signal, comprising a message containing a known sequence of bits, said UWB probe signal comprising the carrier frequency;
demodulating the UWB probe signal using the known sequence of bits;
determining a corrected receiver frequency by iteratively computing the frequency offset, the frequency offset being between the corrected receiver frequency and the carrier frequency based on an autocorrelation of said demodulated UWB probe signal; and
updating the receiver frequency based, at least in part, on the corrected receiver frequency.
2. The method of claim 1, wherein determining the corrected receiver frequency further comprises determining a first frequency offset to include at least a first portion of an offset between the carrier frequency and the receiver frequency.
3. The method of claim 2, wherein determining the corrected receiver frequency further comprises determining a second frequency offset to include at least a second portion of the frequency offset between the carrier frequency and the corrected receiver frequency.
4. The method of claim 3, wherein updating the receiver frequency comprises rotating samples of said demodulated UWB probe signal by an amount based, at least in part, on a sum of said first frequency offset and said second frequency offset.
5. The method of claim 3, wherein determining the corrected receiver frequency further comprises determining a third frequency offset, based upon a frequency offset between the carrier frequency and the corrected receiver frequency.
6. The method of claim 5, wherein updating the receiver frequency comprises rotating samples of said demodulated UWB probe signal by an amount based, at least in part, on a sum of said first frequency offset, said second frequency offset and said third frequency offset.
7. The method of claim 1, wherein determining the corrected receiver frequency further comprises iteratively computing the frequency offset in incremental offsets until a computed incremental offset does not exceed a threshold.
8. The method of claim 1, wherein determining the corrected receiver frequency based, at least in part, on a combination of computed incremental offsets.
9. The method of claim 1, wherein the known sequence of bits comprises at least 100 bits.
10. A device for coherent integration of an ultra-wideband (UWB) probe signal comprising:
a radio frequency (RF) receiver to downconvert a UWB probe signal comprising a carrier frequency according to a receiver frequency, the UWB probe signal comprising a message containing a known sequence of bits; and
a baseband processor to:
demodulate the UWB probe signal using the known sequence of bits;
determine a corrected receiver frequency by iteratively computing a frequency offset between the corrected receiver frequency and the carrier frequency based on an autocorrelation of said demodulated UWB probe signal; and
update the receiver frequency based, at least in part, on the corrected receiver frequency.
11. The device of claim 10, wherein said baseband processor is to further determine the corrected receiver frequency further by determining a first frequency offset to include at least a first portion of an offset between the carrier frequency and the receiver frequency.
12. The device of claim 11, wherein said baseband processor is to further determine the corrected receiver frequency further by determining a second frequency offset to include at least a second portion of the frequency offset between the carrier frequency and the corrected receiver frequency.
13. The device of claim 12, wherein the baseband processor is to further update the receiver frequency by rotating samples of said demodulated UWB probe signal by an amount based, at least in part, on a sum of said first frequency offset and said second frequency offset.
14. The device of claim 12, wherein the baseband processor is to further determine the receiver frequency by determining a third frequency offset, based upon the offset between the carrier frequency and the corrected receiver frequency.
15. The device of claim 14, wherein the baseband processor is to further update the receiver frequency by rotating samples of said demodulated UWB probe signal by an amount based, at least in part, on a sum of said first frequency offset, said second frequency offset and said third frequency offset.
16. The device of claim 10, wherein the baseband processor is to further determine the corrected receiver frequency by iteratively computing the frequency offset in incremental offsets until a computed incremental offset does not exceed a threshold.
17. The device of claim 16, wherein the known sequence of bits comprises 100 bits.
18. A device for coherent integration of an ultra-wideband (UWB) probe signal comprising:
means for receiving, at a receiver operating at a receiver frequency, the UWB probe signal, comprising a message containing a known sequence of bits, said UWB probe signal comprising a carrier frequency;
means for demodulating the UWB probe signal using the known sequence of bits;
means for determining a corrected receiver frequency by iteratively computing a frequency offset between the corrected receiver frequency based on an autocorrelation of said demodulated UWB probe signal; and
means for updating the receiver frequency based, at least in part, on the corrected receiver frequency.
19. The device of claim 18, wherein said means for determining the corrected receiver frequency further comprises means for iteratively computing the frequency offset in incremental offsets until a computed incremental offset does not exceed a threshold.
20. The device of claim 18, wherein the known sequence of bits comprises at least 100 bits.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An apparatus for processing an electronic signal including video and audio portions corresponding to audible and visible portions of the electronic signal, with said audio portion containing a spoken component related to the audible portion and with said video portion containing an auxiliary information component corresponding to a visible representation of said spoken component of said electronic signal comprising:
a video input means to receive video portion of an electronic signal with video portion containing an auxiliary information component,
an audio input means to receive audio portion of an electronic signal with said audio portion corresponding to said video portion,
a video output means by which the video portion of the electronic signal is made available to a user of the apparatus,
an audio output means by which the audio portion of the electronic signal is made available to a user of the apparatus,
means for separating said an auxiliary information component from said video portion,
means for analyzing said auxiliary information component in order to determine if said auxiliary information component contains specific words or phrases, and means for,
(1) muting corresponding audio portion of said electronic signal if specific words or phrases are detected within said auxiliary information component,
(2) removing or replacing any detected specific word or phrase with another word or phrase found within said auxiliary information component of the video portion,
(3) disabling mute at the conclusion of receipt of the modified auxiliary information component,
means to synchronize said modified video portion with audio portion, and means to transmit said synchronized signal to said video output and audio output.
2. The apparatus of claim 1, wherein said auxiliary information component is a closed caption signal.
3. The apparatus of claim 1, wherein said electronic signal is a television signal.
4. The apparatus of claim 1, wherein said electronic signal is a signal received from a storage device such as a video cassette recorder.
5. The apparatus of claim 1, further comprising:
means for selecting different levels of operation with respect to the muting of specific words or phrases, with said different levels include:
(1) a very tolerant level in which no word or phrase will be muted,
(2) a medium tolerant level in which a select amount of words or phrases will be muted,
(3) a strict level in which the list of specific words or phrases in an amount greater than the medium tolerant level will be muted.
6. The apparatus of claim 1, further comprising:
means for displaying of said modified andor unmodified auxiliary information component at the time the specific word or phrase is replaced.
7. The apparatus of claim 6, further comprising:
means for selecting different levels of operation with respect to the displaying of said modified auxiliary information component, with said different levels include:
(1) a full captioning level in which all modified or unmodified auxiliary information data is displayed,
(2) a normal captioning level in which only modified words or phrases which represent the replacement words or phrases are displayed,
(3) a no captioning level in which no word or phrase is displayed.
8. The apparatus of claim 6, wherein said auxiliary information component is a closed caption signal.
9. The apparatus of claim 7, wherein said auxiliary information component is a closed caption signal.