Code conversion method and device, program, and recording medium
AssigneeNEC Corporation
InventorAtsushi Murashima
Life of this patent
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Abstract
An audio decoding device (1) generates a first decoded audio from a first code string by a first decoding method, AN audio encoding device (2) judges whether the first decoded audio is an audio signal or a non-audio signal by using the information contained in the first code string and generates a second code string by encoding the first decoded audio by the second encoding method according to the judgment. Thus, there are provided a device and a method for converting a code obtained y encoding audio by a certain method into a code decodable by the other method with a low calculation amount.
Claims15
A code conversion method of receiving a first code string compliant with a first encoding method to convert the first code string into a second code string compliant with a second encoding method, and to output the same, characterized by comprising:
- a first step of generating a first decoded audio from the first code string in accordance with a first decoding method corresponding to the first encoding method;
- and
- a second step of judging whether the first decoded audio is an audio signal or a non-audio signal by using information contained in the first code string, and encoding the first decoded audio in accordance with the second encoding method on the basis of the judgment to generate a second code string.
A code conversion device for receiving a first code string compliant with a first encoding method to convert the first code string into a second code string compliant with a second encoding method, and to output the same characterized by comprising:
- an audio decoding circuit for generating a first decoded audio from the first code string in accordance with a first decoding method corresponding to the first encoding method;
- and
- an audio encoding circuit for judging whether the first decoded audio is an audio signal or a non-audio signal by using information contained in the first code string, and encoding the first decoded audio in accordance with the second encoding method on the basis of the judgment to generate a second code string.
A code conversion program for use in operating a program controlled processor device that constitutes a code conversion device responsive to a first code string compliant with a first encoding method so as to convert the first code string into a second code string compliant with a second method, the program making the program-controlled processor device execute the steps of:
- (a) processing of generating a first decoded audio from the first code string by a first decoding method;
- and
- (b) processing of judging whether the first decoded audio is an audio signal or a non-audio signal by using information contained in the first code string, and encoding the first decoded audio by the second encoding method based on the judgment to generate a second code string.
A code conversion method for first decoding a first code string containing a header and a payload and encoded according to a first encoding method, and then encoding the code string according to a second encoding method, characterized by judging whether the code string is an audio signal or a non-audio signal based on at least one of the header and the payload of the first code string, decoding the code string based on the judgment, and then encoding the code string according to the second encoding method.
Dependencies are inferred from the claim text.