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Featured researches published by Jukka Ranta.


Journal of the Acoustical Society of America | 1995

Pulse pattern excited linear prediction voice coder

Jari Haggvist; Kari Jarvinen; Kari-Pekka Estola; Jukka Ranta

Speech coding of the code excited linear predictive type is implemented by providing an excitation vector which comprises a set of a pre-determined number of pulse patterns from a codebook of P pulse patterns, which have a selected orientation and a pre-determined delay with respect to the starting point of the excitation vector. This requires modest computational power and a small memory space, which allows it to be implemented in one signal processor.


Journal of the Acoustical Society of America | 2002

Method, device and system for estimating the condition of a user

Pekka Heinonen; Harri Okkonen; Jukka Ranta

An improved method for estimating the status of human physiological and/or psychological conditions by observing the values of the vocal tract parameters output from a digital speech encoder. The user (40) speaks to his device (41), which transforms the input speech from analog to digital form, performs speech encoding (42) on the derived digital signal, and provides values of speech coding parameters (43) locally for further analysis. The stored mathematical relation, e.g. the user-specific vocal tract transformation matrix (47) is retrieved from the memory and utilized in the calculation of corresponding condition parameters (45). Based on these calculated parameters, an estimation (48) of the present status of users condition can be derived (48).


Archive | 1999

Method and system for restricting the operation of a radio device within a certain area

Jukka Ranta


Archive | 1997

Mobile station having enhanced standby mode

Seppo Alanara; Jukka Ranta; Hannu Pirila; Harri Jokinen


Archive | 1990

Cellular telephone system integrated with paging network

Lauri Levanto; Jukka Ranta


Archive | 2007

Method and system for providing interim discontinuous reception/transmission

Lars Dalsgaard; Leping Huang; Jukka Ranta


Journal of the Acoustical Society of America | 1998

Speech recognition method and system

Jukka Ranta


Archive | 1996

Mobile station positioning system

Marko Silventoinen; Timo Rantalainen; Mika Raitola; Jukka Ranta


Archive | 1999

FRAME SYNCHRONIZATION MECHANISM

Fabio Longoni; Jukka Vialen; Valtteri Niemi; Jukka Ranta


Archive | 1994

Enhanced decoder for a radio telephone

Ilkka Heikkila; Harri Jokinen; Jukka Ranta

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