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61. 发明专利

CA2958360C AUDIO DECODER 未知
公开(公告)号：CA2958360C
公开(公告)日：2017-11-14
申请号：CA2958360
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/26 , G10L19/02 , G10L19/107 , G10L19/20
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode

62. 发明专利

AU2016204303B2 PITCH FILTER FOR AUDIO SIGNALS AND METHOD FOR FILTERING AN AUDIO SIGNAL WITH A PITCH FILTER 未知
公开(公告)号：AU2016204303B2
公开(公告)日：2017-09-14
申请号：AU2016204303
申请日：2016-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an 5 operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio decoder having a coding mode selected from one of at least two distinct coding modes, and the pitch 10 filter is capable of being selectively operated in either the active mode or the inactive mode based on control information while the audio decoder is operating in the coding mode. A method for filtering a preliminary audio signal with a pitch filter substantially as described above is also disclosed. WO 2012/000882 PCT/EP2O1 1/060555 co~ coC ci, n ClCo SoCo C)) Fig.

63. 发明专利

CA2928180C SELECTIVE BASS POST FILTER 未知
公开(公告)号：CA2928180C
公开(公告)日：2017-03-28
申请号：CA2928180
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/125 , G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

64. 发明专利

AU2015200065B2 Post filter, decoder system and method of decoding 未知
公开(公告)号：AU2015200065B2
公开(公告)日：2016-10-20
申请号：AU2015200065
申请日：2015-01-08
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In one aspect, the invention provides an interharmonic noise attenuation post filter with variable gain controlling the interharmonic attenuation, the 5 filter being adapted to receive an input signal comprising a preliminary audio signal decoded according to one of a plurality of decoding modes, and to supply an output audio signal, the post filter including a control section with a gain controller operable to set the variable gain to zero, whereby the post filter supplies the preliminary audio signals as output 10 audio signal, in dependence of the value of a post-filtering signal only. In another aspect, the invention provides a decoder system for decoding a bit stream signal as an audio time signal, including: a decoding section for decoding a bit stream signal as a preliminary audio time signal; and the interharmonic noise attenuation post filter. In a further aspect, a 15 method of decoding a bit stream signal as an audio time signal is provided; and in another aspect a computer-program product including a data carrier storing instructions for performing the method is also provided. WO 2012/000882 PCT/EP2011/060555 Bitstream dec. dec. 1040 ,ot 1043 10 Pos' Delay filter audio signal Fig. 10

65. 发明专利

AU2015200065A1 Post filter, decoder system and method of decoding 未知
公开(公告)号：AU2015200065A1
公开(公告)日：2015-02-05
申请号：AU2015200065
申请日：2015-01-08
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In one aspect, the invention provides an interharmonic noise attenuation post filter with variable gain controlling the interharmonic attenuation, the 5 filter being adapted to receive an input signal comprising a preliminary audio signal decoded according to one of a plurality of decoding modes, and to supply an output audio signal, the post filter including a control section with a gain controller operable to set the variable gain to zero, whereby the post filter supplies the preliminary audio signals as output 10 audio signal, in dependence of the value of a post-filtering signal only. In another aspect, the invention provides a decoder system for decoding a bit stream signal as an audio time signal, including: a decoding section for decoding a bit stream signal as a preliminary audio time signal; and the interharmonic noise attenuation post filter. In a further aspect, a 15 method of decoding a bit stream signal as an audio time signal is provided; and in another aspect a computer-program product including a data carrier storing instructions for performing the method is also provided. WO 2012/000882 PCT/EP2011/060555 Bitstream dec. dec. 1040 ,ot 1043 10 Pos' Delay filter audio signal Fig. 10

66. 发明专利

AU2011273680B2 Selective bass post filter 未知
公开(公告)号：AU2011273680B2
公开(公告)日：2014-10-16
申请号：AU2011273680
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/02 , G10L19/10 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

67. 发明专利

CA3124114A1 AUDIO DECODING WITH SELECTIVE POST FILTERING 未知
公开(公告)号：CA3124114A1
公开(公告)日：2012-01-05
申请号：CA3124114
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/26 , G10L19/02 , G10L19/087 , G10L19/107 , G10L19/125 , G10L19/20 , H04N19/46
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode.In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

68. 发明专利

CA3093517A1 AUDIO DECODING WITH SELECTIVE POST FILTERING 未知
公开(公告)号：CA3093517A1
公开(公告)日：2012-01-05
申请号：CA3093517
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/125 , G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26 , G10L21/028 , G10L25/90
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode.In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

69. 发明专利

CA2976485A1 AUDIO DECODER 未知
公开(公告)号：CA2976485A1
公开(公告)日：2012-01-05
申请号：CA2976485
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/18 , G10L19/02 , G10L19/032 , G10L19/107 , G10L19/20 , G10L19/26 , G10L21/0332 , G10L25/90
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode.In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

70. 发明专利

CA2928180A1 SELECTIVE BASS POST FILTER 未知
公开(公告)号：CA2928180A1
公开(公告)日：2012-01-05
申请号：CA2928180
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/125 , G10L19/02 , G10L19/107 , G10L19/20 , G10L19/26
摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

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