公开(公告)号：WO2007064256A3

公开(公告)日：2007-12-13

申请号：PCT/SE2005001800

申请日：2005-11-30

Applicant: ERICSSON TELEFON AB L M ,  SANDGREN NICKLAS ,  SVEDBERG JONAS

Inventor： SANDGREN NICKLAS ,  SVEDBERG JONAS

IPC: G10L19/14 ,  G10L19/012 ,  G10L19/16

CPC classification number: G10L19/012 ,  G10L19/173

Abstract: Speech frames of a first speech coding scheme are utilized (210) as speech frames of a second speech coding scheme, where the speech coding schemes use similar core compression schemes for the speech frames, preferably bit stream compatible. An occurrence of a state mismatch in an energy parameter between the first speech coding scheme and the second speech coding scheme is identified (216), preferably either by determining (214) an occurrence of a predetermined speech evolution, such as a speech type transition, e.g. an onset of speech following a period of speech inactivity, or by tentative decoding of the energy parameter in the two encoding schemes followed by a comparison. Subsequently, the energy parameter in at least one frame of the second speech coding scheme following the occurrence of the state mismatch is adjusted (218). The present invention also presents transcoders and communications systems providing such transcoding functionality.

Abstract translation: 利用第一语音编码方案的语音帧（210）作为第二语音编码方案的语音帧，其中语音编码方案对于语音帧使用相似的核心压缩方案，优选地与比特流兼容。 识别第一语音编码方案和第二语音编码方案之间的能量参数中的状态失配的发生（216），优选地通过确定（214）诸如语音类型转换的预定语音演进的发生， 例如 在语音不活动时段之后的语音开始，或者通过对两个编码方案中的能量参数的暂时解码进行比较。 随后，调整在发生状态失配之后的第二语音编码方案的至少一帧中的能量参数（218）。 本发明还提供了提供这种代码转换功能的代码转换器和通信系统。

公开(公告)号：WO2007064256A2

公开(公告)日：2007-06-07

申请号：PCT/SE2005/001800

申请日：2005-11-30

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  SANDGREN, Nicklas ,  SVEDBERG, Jonas

Inventor： SANDGREN, Nicklas ,  SVEDBERG, Jonas

IPC: G10L19/012 ,  G10L19/16

CPC classification number: G10L19/012 ,  G10L19/173

Abstract: Speech frames of a first speech coding scheme are utilized (210) as speech frames of a second speech coding scheme, where the speech coding schemes use similar core compression schemes for the speech frames, preferably bit stream compatible. An occurrence of a state mismatch in an energy parameter between the first speech coding scheme and the second speech coding scheme is identified (216), preferably either by determining (214) an occurrence of a predetermined speech evolution, such as a speech type transition, e.g. an onset of speech following a period of speech inactivity, or by tentative decoding of the energy parameter in the two encoding schemes followed by a comparison. Subsequently, the energy parameter in at least one frame of the second speech coding scheme following the occurrence of the state mismatch is adjusted (218). The present invention also presents transcoders and communications systems providing such transcoding functionality.

Abstract translation: 利用（210）第一语音编码方案的语音帧作为第二语音编码方案的语音帧，其中语音编码方案对语音帧使用类似的核心压缩方案，优选地，比特流兼容 。 识别（216）第一语音编码方案和第二语音编码方案之间的能量参数中的状态失配的发生，优选地通过确定（214）诸如语音类型转换的预定语音演进的发生， 例如 在一段语音不活动之后的语音开始，或者通过在两种编码方案中进行能量参数的临时解码，然后进行比较。 随后，调整（218）发生状态失配之后的第二语音编码方案的至少一个帧中的能量参数。 本发明还提供了提供这种代码转换功能的代码转换器和通信系统。