Method and device for processing signal
Method and device for processing signal
 CN 106,409,303 A
 Filed: 04/29/2014
 Published: 02/15/2017
 Est. Priority Date: 04/29/2014
 Status: Active Grant
First Claim
1. a kind of method of process signal is it is characterised in that include：
 Select M subband from N number of subband, described N number of subband is the frequency spectrum of the present frame to signalCoefficient division obtains, and the frequency range of described M subband is less than in described N number of subband except described M sonThe frequency range of K subband outside band, N is the positive integer more than 1, M and K is positive integer, MIt is N with K sum；
Energy response according to described M subband and spectral characteristic, determine former to described M subbandOperation is revised in the execution of beginning envelope value；
Respectively the original envelope value of described M subband is modified, to obtain described M subbandRevise envelope value；
Correction envelope value according to described M subband and the original envelope value of described K subband are rightDescribed N number of subband carries out a bit distribution.
Abstract
An embodiment of the invention provides a method and device for processing a signal. The method includes the following steps: selecting M subbands from N subbands, wherein the N subbands are obtained by division of a frequency spectrum coefficient of a current frame of a signal, and frequency bands of the M subbands are lower than frequency bands of K subbands among the N subbands except the M subbands; according to performance information of the M subbands, determining execution of correction operation on original envelope values of the M subbands, wherein the performance information is used for indicating energy characteristics and frequency spectrum characteristics of the M subbands; correcting the original envelope values of the M subbands to obtain corrected envelope values of the M subbands; and according to the corrected envelope values of the M subbands and original envelope values of the K subbands, performing primary bite distribution on the N subbands. The method provided by the embodiment of the invention enables bit distribution to better satisfy the bit requirement of each subband, and thus encoding and decoding performance of the signal can be improved.

3 Citations
No References
Bit allocation method in subband coding  
Patent #
US 5,479,561 A
Filed 04/30/1993

Current Assignee
N/A

Bit allocation method, encoding device and decoding device  
Patent #
CN 101,853,663 A
Filed 03/30/2009

Current Assignee

Signal processing method and device  
Patent #
CN 101,770,775 A
Filed 02/16/2009

Current Assignee

54 Claims

1. a kind of method of process signal is it is characterised in that include：

Select M subband from N number of subband, described N number of subband is the frequency spectrum of the present frame to signalCoefficient division obtains, and the frequency range of described M subband is less than in described N number of subband except described M sonThe frequency range of K subband outside band, N is the positive integer more than 1, M and K is positive integer, MIt is N with K sum； Energy response according to described M subband and spectral characteristic, determine former to described M subbandOperation is revised in the execution of beginning envelope value； Respectively the original envelope value of described M subband is modified, to obtain described M subbandRevise envelope value； Correction envelope value according to described M subband and the original envelope value of described K subband are rightDescribed N number of subband carries out a bit distribution.


2. method according to claim 1 it is characterised in that described according to described M subbandEnergy response and spectral characteristic, determine the execution of the original envelope value of described M subband is revised and operate,Including：

According to the original envelope value of described N number of subband, determine the energy response of described M subband, itsDescribed in M subband energy response represent described signal present frame spectrum energy in described MIntensity on subband； According to the original envelope value of described M subband, determine the spectral characteristic of described M subband, itsDescribed in the spectral characteristic of M subband represent the spectral fluctuations degree of described M subband； Belong to the first scope in the energy response of described M subband and the frequency spectrum of described M subband is specialProperty belong to the second scope in the case of, determine the execution of the original envelope value of described M subband is revised and graspMake.


3. method according to claim 2 is it is characterised in that described first scope is [1/6,2/3].

4. method according to claim 2 is it is characterised in that described second scope isOr

5. method according to claim 4 is it is characterised in that described first scope is [1/6,2/3].

6. according to the arbitrary described method of claim 2 to 5 it is characterised in that described in described basisThe original envelope value of N number of subband, determines the energy response of described M subband, including：

The gross energy of described M subband is determined according to the original envelope value of described M subband； According to the original envelope value of described K subband, determine the gross energy of described K subband； The ratio of the gross energy of described M subband and the gross energy of described K subband is defined as describedFirst parameter.


7. method according to claim 6 it is characterised in that described according to described M subbandOriginal envelope value, determine the spectral characteristic of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of described first subband and the gross energy of described M subband is defined as described MThe spectral characteristic of individual subband.


8. according to the arbitrary described method of claim 2 to 5 it is characterised in that described in described basisThe original envelope value of M subband, determines the spectral characteristic of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of the first subband and the gross energy of described M subband is defined as described M sonThe spectral characteristic of band.


9. method according to any one of claim 1 to 5 is it is characterised in that described differenceThe original envelope value of described M subband is modified, to obtain the correction envelope of described M subbandValue, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


10. method according to claim 6 it is characterised in that described respectively to described M sonThe original envelope value of band is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


11. methods according to claim 7 it is characterised in that described respectively to described M sonThe original envelope value of band is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


12. methods according to claim 8 it is characterised in that described respectively to described M sonThe original envelope value of band is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


13. methods according to claim 9 it is characterised in that described respectively to described M sonThe original envelope value of band is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


14. methods according to any one of claim 1 to 5 are it is characterised in that described MIn individual subband, the correction envelope value of each subband is more than original envelope value.

15. methods according to any one of claim 1 to 5 are it is characterised in that described correctionEnvelope value refers to the correction envelope value quantifying, and described original envelope value refers to the original envelope value quantifying.

16. A kind of 16. equipment of process signal are it is characterised in that include：

Select unit, for selecting M subband from N number of subband, described N number of subband is to signalThe spectral coefficient of present frame divide and obtain, the frequency range of described M subband is less than described N number of subbandIn K subband in addition to described M subband frequency range, N is the positive integer more than 1, M and KIt is positive integer, M and K sum are N； Determining unit, for the energy response according to described M subband and spectral characteristic, determines to institute Operation is revised in the original envelope value execution stating M subband； Amending unit, for being modified to the original envelope value of described M subband respectively, to obtainThe correction envelope value of described M subband； Allocation unit, for the correction envelope value according to described M subband and described K subbandOriginal envelope value, carries out a bit distribution to described N number of subband.


17. equipment according to claim 16 it is characterised in that described determining unit, specificallyFor：

According to the original envelope value of described N number of subband, determine the energy response of described M subband, itsDescribed in M subband energy response represent described signal present frame spectrum energy in described MIntensity on subband； According to the original envelope value of described M subband, determine the spectral characteristic of described M subband, itsDescribed in the spectral characteristic of M subband represent the spectral fluctuations degree of described M subband； Belong to the first scope in the energy response of described M subband and the frequency spectrum of described M subband is specialProperty belong to the second scope in the case of, determine the execution of the original envelope value of described M subband is revised and graspMake.


18. equipment according to claim 17 it is characterised in that described first scope be [1/6,2/3].

19. equipment according to claim 17 are it is characterised in that described second scope isOr

20. equipment according to claim 19 it is characterised in that described first scope be [1/6,2/3].

21. according to the arbitrary described equipment of claim 16 to 20 it is characterised in that described determination listUnit, specifically for：

The gross energy of described M subband is determined according to the original envelope value of described M subband； According to the original envelope value of described K subband, determine the gross energy of described K subband； The ratio of the gross energy of described M subband and the gross energy of described K subband is defined as describedThe energy response of M subband.


22. according to the arbitrary described equipment of claim 16 to 20 it is characterised in that described determination listUnit, specifically for：

According to the original envelope value of described M subband, determine the gross energy and first of described M subband The energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of described first subband and the gross energy of described M subband is defined as described MThe spectral characteristic of individual subband.


23. equipment according to any one of claim 16 to 20 are it is characterised in that described repairPositive unit, specifically for：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


24. equipment according to claim 21 it is characterised in that described amending unit, specificallyFor：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


25. equipment according to claim 22 it is characterised in that described amending unit, specificallyFor：

Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


26. equipment according to any one of claim 16 to 20 are it is characterised in that described MIn individual subband, the correction envelope value of each subband is more than original envelope value.

27. equipment according to any one of claim 16 to 20 are it is characterised in that described repairPositive envelope value refers to the correction envelope value quantifying, and described original envelope value refers to the original envelope value quantifying.

28. A kind of 28. methods of process signal are it is characterised in that include：

According to the energy response of M subband and spectral characteristic in N number of subband, determine to described M sonOperation is revised in the original envelope value execution of band, and described N number of subband is the spectral coefficient of the present frame to signalDivide and obtain, the frequency range of described M subband be less than in described N number of subband remove described M subband itThe frequency range of K outer subband, N is the positive integer more than 1, M and K is positive integer, M and K Sum is N； Respectively the original envelope value of described M subband is modified, to obtain described M subbandRevise envelope value； Correction envelope value according to described M subband and the original envelope value of described K subband are rightDescribed N number of subband carries out a bit distribution.


29. methods according to claim 28 it is characterised in that described according to described M sonThe energy response of band and spectral characteristic, determine that behaviour is revised in the original envelope value execution to described M subbandMake, including：

According to the original envelope value of described N number of subband, determine the energy response of described M subband； According to the original envelope value of described M subband, determine the spectral characteristic of described M subband； Belong to the first scope in the energy response of described M subband and the frequency spectrum of described M subband is specialProperty belong to the second scope in the case of, determine the execution of the original envelope value of described M subband is revised and graspMake.


30. methods according to claim 29 it is characterised in that described first scope be [1/6,2/3].

31. methods according to claim 29 are it is characterised in that described second scope isOr

32. methods according to claim 31 it is characterised in that described first scope be [1/6,2/3].

33. according to the arbitrary described method of claim 29 to 32 it is characterised in that described according to instituteState the original envelope value of N number of subband, determine the energy response of described M subband, including：

The gross energy of described M subband is determined according to the original envelope value of described M subband； According to the original envelope value of described K subband, determine the gross energy of described K subband； The ratio of the gross energy of described M subband and the gross energy of described K subband is defined as describedFirst parameter.


34. methods according to claim 33 it is characterised in that described according to described M sonThe original envelope value of band, determines the spectral characteristic of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of described first subband and the gross energy of described M subband is defined as described M The spectral characteristic of individual subband.


35. according to the arbitrary described method of claim 29 to 32 it is characterised in that described according to instituteState the original envelope value of M subband, determine the spectral characteristic of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of the first subband and the gross energy of described M subband is defined as described M sonThe spectral characteristic of band.


36. methods according to any one of claim 28 to 32 are it is characterised in that described pointThe other original envelope value to described M subband is modified, to obtain the correction bag of described M subbandNetwork value, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


37. methods according to claim 33 it is characterised in that described respectively to described MThe original envelope value of subband is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


38. methods according to claim 34 it is characterised in that described respectively to described MThe original envelope value of subband is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


39. methods according to claim 35 it is characterised in that described respectively to described MThe original envelope value of subband is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


40. methods according to claim 36 it is characterised in that described respectively to described MThe original envelope value of subband is modified, to obtain the correction envelope value of described M subband, including：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


41. methods according to any one of claim 28 to 32 are it is characterised in that described MIn individual subband, the correction envelope value of each subband is more than original envelope value.

42. methods according to any one of claim 28 to 32 are it is characterised in that described repairPositive envelope value refers to the correction envelope value quantifying, and described original envelope value refers to the original envelope value quantifying.

43. A kind of 43. equipment of process signal are it is characterised in that include：

Determining unit, for according to the energy response of M subband and spectral characteristic in N number of subband, reallyOperation is revised in the fixed original envelope value execution to described M subband, and described N number of subband is to signalThe spectral coefficient division of present frame obtains, and the frequency range of described M subband is less than in described N number of subbandThe frequency range of K subband in addition to described M subband, N is the positive integer more than 1, M and K is equalFor positive integer, M and K sum are N； Amending unit, for being modified to the original envelope value of described M subband respectively, to obtainThe correction envelope value of described M subband； Allocation unit, for the correction envelope value according to described M subband and described K subbandOriginal envelope value, carries out a bit distribution to described N number of subband.


44. equipment according to claim 43 it is characterised in that described determining unit, specificallyFor：

According to the original envelope value of described N number of subband, determine the energy response of described M subband, itsDescribed in M subband energy response represent described signal present frame spectrum energy in described MIntensity on subband； According to the original envelope value of described M subband, determine the spectral characteristic of described M subband, itsDescribed in the spectral characteristic of M subband represent the spectral fluctuations degree of described M subband； Belong to the first scope in the energy response of described M subband and the frequency spectrum of described M subband is specialProperty belong to the second scope in the case of, determine the execution of the original envelope value of described M subband is revised and graspMake.


45. equipment according to claim 44 it is characterised in that described first scope be [1/6,2/3].

46. equipment according to claim 44 are it is characterised in that described second scope isOr

47. equipment according to claim 46 it is characterised in that described first scope be [1/6,2/3].

48. according to the arbitrary described equipment of claim 43 to 47 it is characterised in that described determination listUnit, specifically for：

The gross energy of described M subband is determined according to the original envelope value of described M subband； According to the original envelope value of described K subband, determine the gross energy of described K subband； The ratio of the gross energy of described M subband and the gross energy of described K subband is defined as describedThe energy response of M subband.


49. according to the arbitrary described equipment of claim 43 to 47 it is characterised in that described determination listUnit, specifically for：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； The ratio of the energy of described first subband and the gross energy of described M subband is defined as described MThe spectral characteristic of individual subband.


50. equipment according to any one of claim 43 to 47 are it is characterised in that described repairPositive unit, specifically for：

According to the original envelope value of described M subband, determine the gross energy and first of described M subbandThe energy of subband, wherein described in described M subband, the energy of the first subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


51. equipment according to claim 48 it is characterised in that described amending unit, specificallyFor：

According to the original envelope value of described M subband, determine the energy of the first subband, wherein describedThe energy of the first subband described in M subband is maximum； Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


52. equipment according to claim 49 it is characterised in that described amending unit, specificallyFor：

Gross energy according to described M subband and the energy of described first subband, determine modifying factor； Using described modifying factor, respectively the original envelope value of described M subband is modified, withObtain the correction envelope value of described M subband.


53. equipment according to any one of claim 43 to 47 are it is characterised in that described MIn individual subband, the correction envelope value of each subband is more than original envelope value.

54. equipment according to any one of claim 43 to 47 are it is characterised in that described repairPositive envelope value refers to the correction envelope value quantifying, and described original envelope value refers to the original envelope value quantifying.
Specification(s)