Audio transmission system with reduced bandwidth consumption
View Patent ↗An audio transmission system and an associated method are disclosed, the system includes a transmitting device suitable for converting an audio signal to a digitized signal, a receiving device suitable for receiving transmissions from the transmitting device, and a phonetic analyzer suitable for comparing the digitized signal to a set of digitized signals stored in a first dictionary. The phonetic analyzer is adapted to transmit, in lieu of the digitized signal, an index value associated with the digitized signal to a receiving device in response to detecting a match between the digitized signal and one of the first dictionary entries. The phonetic analyzer is further adapted to assign an index value to the digitized signal and to store the digitized signal and its corresponding digitized signal in an entry of the first dictionary in response to detecting no match between the digitized signal and any of the first dictionary entries. The phonetic analyzer may be configured to compress the index value prior to transmission. The receiving device includes a second dictionary and a dictionary controller for receiving the index value and the corresponding digitized signal and for storing the index value and the corresponding index value in the second dictionary. Upon detecting an index value that matches to an index value in the second dictionary, the receiving device may be configured to retrieve the corresponding digitized signal from the second dictionary. The phonetic analyzer may assign index values that are indicative of the corresponding digitized signals such that index values assigned to similar digitized signals are similar and index values assigned to dissimilar digitized signals are dissimilar. In this embodiment, upon detecting an index value that fails to match to an index value in the secondary dictionary, the dictionary controller determines a closest matching index value and retrieves the digitized signal corresponding to closest matching index value from the second dictionary.
1. A method of transmitting audio information, comprising:
converting an audio signal to a digitized signal;
comparing the digitized signal to a set of digitized signal entries in a first dictionary, wherein each digitized signal entry is associated with a corresponding index value;
responsive to detecting a match between the digitized signal and one of the first dictionary entries, transmitting the index value in lieu of the digitized signal to a receiving device; and
responsive to detecting no match between the digitized signal and any of the first dictionary entries, assigning an index value to the digitized signal and storing the digitized signal and the corresponding assigned index value in an entry of the first dictionary.
2. The method of claim 1 , further comprising, compressing the index value prior to transmission.
3. The method of claim 1 , further comprising receiving the index value and the corresponding digitized signal and storing the index value and the corresponding digitized signal in a second dictionary.
4. The method of claim 3 , further comprising, upon receiving an index value that matches to an index value in the second dictionary, retrieving the corresponding digitized signal from the second dictionary.
5. The method of claim 3 , wherein receiving the index value includes verifying the integrity of the index value with an error correction protocol.
6. The method of claim 1 , wherein the index value assigned to a digitized signal is indicative of the digitized signal such that index values assigned to similar digitized signals are similar and index values assigned to dissimilar digitized signals are dissimilar.
7. The method of claim 3 , wherein, upon detecting an index value that fails to match to an index value in the second dictionary, determining a closest matching index value and retrieving the digitized signal corresponding to the closest matching index value from the second dictionary.
8. The method of claim 1 , further comprising:
assigning an index value to a sequence of digitized signals including a first digitized signal corresponding to a first entry in the first dictionary and a second digitized signal corresponding to a second entry in the digitized signal; and
transmitting the index value to the receiving device in lieu of the sequence of digitized signals.
9. The method of claim 1 , wherein converting the audio signal to the digitized signal includes pre-filtering the audio signal wherein the pre-filtering includes normalizing volume and pitch characteristics of the audio signal.
10. The method of claim 9 , further comprising transmitting volume and pitch quantizations with the index value.
11. An audio transmission system, comprising:
a transmitting device suitable for converting an audio signal to a digitized signal;
a receiving device suitable for receiving transmissions from the transmitting device;
a phonetic analyzer suitable for comparing the digitized signal to a set of digitized signals stored in a first dictionary;
wherein the phonetic analyzer is adapted, responsive to detecting a match between the digitized signal and one of the first dictionary entries, transmitting an index value associated with the digitized signal in lieu of the digitized signal to a receiving device; and
wherein the phonetic analyzer is further adapted, responsive to detecting no match between the digitized signal and any of the first dictionary entries, assigning an index value to the digitized signal and storing the digitized signal and the corresponding index value in an entry of the first dictionary.
12. The system of claim 11 , wherein the phonetic analyzer is configured to compress the index value prior to transmission.
13. The system of claim 11 , wherein the receiving device includes a second dictionary and a dictionary controller for receiving the index value and the corresponding digitized signal and storing the index value and the corresponding index value in the second dictionary.
14. The system of claim 11 , wherein the receiving device includes a second dictionary and a dictionary controller, and wherein the receiving device, upon detecting an index value that matches to an index value in the second dictionary, is configured to retrieve the corresponding digitized signal from the second dictionary.
15. The system of claim 11 , wherein the phonetic analyzer assigns index values that are indicative of the corresponding digitized signals such that index values assigned to similar digitized signals are similar and index values assigned to dissimilar digitized signals are dissimilar.
16. The system of claim 15 , wherein, upon detecting an index value that fails to match to an index value in the secondary dictionary, the dictionary controller determines a closest matching index value and retrieves the digitized signal corresponding to closest matching index value from the second dictionary.
17. The system of claim 11 , wherein the phonetic analyze is further configured to assign an index value to a sequence of digitized signals including a first digitized signal corresponding to a first entry in the first dictionary and a second digitized signal corresponding to a second entry in the digitized signal and to transmit the index value to the receiving device in lieu of the sequence of digitized signals.
18. A computer program product comprising a set of instructions configured on a computer readable medium for transmitting audio information, the set of instructions comprising:
means for generating a set of dictionary digitized signals and a corresponding set of index values;
means for comparing a received digitized audio signal to the set of dictionary digitized signals;
means for transmitting, upon detecting a match between the received digitized signal and the set of dictionary digitized signals, the index value corresponding to the matching dictionary digitized signal; and
means for assigning, upon detecting no match between the digitized signal and any of the first dictionary entries, an index value to the digitized signal and storing the digitized signal and the corresponding assigned index value in an entry of the first dictionary.
19. The computer program product of claim 18 , wherein the means for generating the dictionary digitized signals and the corresponding set of index values assigns index values that are indicative of the corresponding digitized signals such that index values assigned to similar digitized signals are similar and index values assigned to dissimilar digitized signals are dissimilar.
20. The computer program product of claim 19 , wherein, the means for generating the dictionary digitized signals, upon detecting an index value that fails to match to an index value in the secondary dictionary, determines a closest matching index value and retrieves the digitized signal corresponding to closest matching index value from the second dictionary.
21. The computer program product of claim 18 , wherein the means for generating the dictionary digitized signals is further configured to assign an index value to a sequence of digitized signals including a first digitized signal corresponding to a first entry in the dictionary digitized signals and a second digitized signal corresponding to a second entry in the dictionary digitized signals.