Processing a speech frame in a radio system
First Claim
1. A method of processing a speech frame in a radio system, comprising:
- channel-decoding a speech frame having propagated over a radio path;
determining whether the speech frame is free of defects on the basis of the channel-decoding;
if the speech frame is defective on the basis of the channel-decoding, no attempt to correct the defective speech frame is made by a speech decoder;
if the speech frame is free of defects on the basis of the channel-decoding, determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder;
if it is determined that the speech frame does contain speech that is decodable by means of a speech decoder, the speech frame is decoded by means of a speech decoder; and
if, in determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does not contain speech that would be decodable by means of a speech decoder, the speech frame is not decoded.
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Accused Products
Abstract
The invention relates to method of processing a speech frame in radio system, a radio system, a mobile station in radio system, and a network of radio system. In the method a speech frame having propagated over a radio path is channel-decoded. If on the basis of the channel-decoding the speech frame is free of defects, it is inferred from the value of at least one speech parameter in the channel-decoded speech frame whether the speech frame contains speech that is decodable by means of a speech decoder; and if, according to the inference, the speech frame does contain speech that is decodable by means of a speech decoder, the speech frame is decoded by means of a speech decoder; and if, according to the inference, the speech frame does not contain speech that would be decodable by means of the speech decoder, the speech frame is not decoded.
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Citations
29 Claims
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1. A method of processing a speech frame in a radio system, comprising:
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channel-decoding a speech frame having propagated over a radio path; determining whether the speech frame is free of defects on the basis of the channel-decoding; if the speech frame is defective on the basis of the channel-decoding, no attempt to correct the defective speech frame is made by a speech decoder; if the speech frame is free of defects on the basis of the channel-decoding, determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder; if it is determined that the speech frame does contain speech that is decodable by means of a speech decoder, the speech frame is decoded by means of a speech decoder; and if, in determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does not contain speech that would be decodable by means of a speech decoder, the speech frame is not decoded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a channel decoder configured to channel-decode a channel-coded speech frame having propagated over a radio path; a speech decoder configured to decode the speech frame; and a processor configured to determine whether the speech frame is free of defects on the basis of the channel-decoding, if the speech frame is defective on the basis of the channel-decoding no attempt to correct the defective speech frame by the speech decoder is made, and if the speech frame is free of defects on the basis of the channel decoding, determine only from the value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes whether the speech frame contains speech that is decodable by means of the speech decoder; and wherein the speech decoder is configured to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does contain speech that is decodable by means of the speech decoder; and the speech decoder is arranged not to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does not contain speech that would be decodable by means of the speech decoder. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A mobile station in a radio system, comprising:
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a channel decoder for channel-decoding a channel-coded speech frame having propagated over a radio path; a speech decoder for decoding the speech frame; and a processor configured to determine whether the speech frame is free of defects on the basis of the channel-decoding, if the speech frame is defective on the basis of the channel-decoding no attempt to correct the defective speech frame by the speech decoder is made, and if the speech frame is free of defects on the basis of the channel decoding, determine only from the value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes whether the speech frame contains speech that is decodable by means of the speech decoder; and the speech decoder is configured to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does contain speech that is decodable by means of the speech decoder; and the speech decoder is arranged not to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does not contain speech that would be decodable by means of the speech decoder. - View Dependent Claims (27)
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28. A network of a radio system, comprising:
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a channel decoder for channel-decoding a channel-coded speech frame having propagated over a radio path; a speech decoder for decoding the speech frame; and a processor configured to determine whether the speech frame is free of defects on the basis of the channel-decoding, if the speech frame is defective on the basis of the channel-decoding no attempt to correct the defective speech frame by the speech decoder is made, and if the speech frame is free of defects on the basis of the channel decoding, determine only from the value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes whether the speech frame contains speech that is decodable by means of the speech decoder; and the speech decoder is configured to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does contain speech that is decodable by means of the speech decoder; and the speech decoder is arranged not to decode the speech frame if, according to determining only from value of at least one speech parameter in the channel-decoded speech frame and not from using channel codes, whether the speech frame contains speech that is decodable by means of a speech decoder, the speech frame does not contain speech that would be decodable by means of the speech decoder. - View Dependent Claims (29)
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Specification