公开(公告)号：BRPI9902603B1

公开(公告)日：2016-11-16

申请号：BR9902603

申请日：1999-05-27

Applicant: GOOGLE TECHNOLOGY HOLDINGS LLC ,  MOTOROLA MOBILITY INC ,  MOTOROLA MOBILITY LLC ,  MOTOROLA SOLUTIONS INC ,  MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMING

IPC: G10L19/04 ,  G10L19/00 ,  G10L25/93

Abstract: método e aparelho para codificar e decodificar mensagem . são alocados bits para informação de repetição de curto prazo para sinais de entrada sem voz. dito de forma diferente, mais bits são alocados para informação de freqüência de som durante mensagem de entrada sem voz do que no estado da técnica. o método e aparelho aperfeiçoados em um codificador (300) e decodificador (700) resultam em consistência aperfeiçoada de pulsos de amplitude em comparação com os métodos do estado da técnica que indicam estabilidade aperfeiçoada devido à resolução de busca aumenta. além disso, o método e aparelho aperfeiçoados resultam em energia superior em comparação com os métodos do estado da técnica que indicam que a forma de onda sisntetizada equipara-se à forma de onda alvo mais estreitamente, resultando em um ganho de lista de código fixa superior (fcb).

公开(公告)号：BR9904633A

公开(公告)日：2000-09-26

申请号：BR9904633

申请日：1999-05-27

Applicant: MOTOROLA INC

Inventor： PENG WEIMING ,  ASHLEY JAMES PATRICK

IPC: G10L19/00 ,  G10L19/10 ,  G10L19/14 ,  H04Q7/32

Abstract: A speech coder (400) for coding an information signal varies the codebook configuration based on parameters inherent in the information signal. The speech coder (400) requires no additional overhead for sending of mode parameters while allowing subframe resolution. The configurations vary not only for voicing level, but also for pitch period since different physiological traits yield different codebook configurations. A dispersion matrix (406) within the speech coder (400) facilitates a codebook search which is performed on vectors whose length can be less than a subframe length. Additionally, use of the dispersion matrix (406) allows the addition of random events for very slightly voiced speech which incurs little computational overhead but produces a rich excitation.

公开(公告)号：BR9902603A

公开(公告)日：2000-01-18

申请号：BR9902603

申请日：1999-05-27

Applicant: MOTOROLA INC

Inventor： ASHLEY JAMES PATRICK ,  PENG WEIMING

IPC: G10L19/00 ,  G10L25/93 ,  H03M13/00

Abstract: Bits are allocated to short-term repetition information for unvoiced input signals. Stated differently, more bits are allocated for pitch information during unvoiced input speech than in the prior art. The improved method and apparatus in an encoder (300) and decoder (700) result in improved consistency of amplitude pulses compared to prior art methods which indicates improved stability due to increased search resolution. Also, the improved method and apparatus result in higher energy compared to prior art methods which indicates that the synthesized waveform matches the target waveform more closely, resulting in a higher fixed codebook (FCB) gain.