Code conversion device, code conversion method used for the...

G - Physics – 10 – L

Patent

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G10L 19/00 (2006.01)

Patent

CA 2633694

Provided is a code conversion device that is capable of converting codes even if an input code sequence is invalid, and is able to reduce the amount of processing. When a first code sequence is input, the code conversion device generates a decoded signal by decoding the codes of normal frames of the first code sequence at Step S1, stores and holds the decoded signal at Step S2, generates a signal corresponding to an invalid frame by interpolation with the decoded signal that is stored and held, at Step S3. Subsequently, the code conversion device generates codes corresponding to the invalid frame by encoding the generated signal at Step S4, and makes the normal frames of the first code sequence without conversion be the frames of the second code sequence while making the generated codes be the frame of the second code sequence, in place of the codes of the invalid frame, at Step S5.

La présente invention concerne un dispositif de conversion de code capable de convertir un code même si une chaîne de code entrée est de type non autorisé, tout en réduisant sa quantité de traitement. Lorsqu'on entre une première chaîne de code, le dispositif de conversion de code décode le code d'une trame normale dans la première chaîne de code de manière à générer un signal décode à l'étape S1, stocke/conserve le signal décodé à l'étape S2, et génère un signal correspondant à une trame non autorisée par interpolation du signal décodé stocké et conservé à l'étape S3. Subséquemment, à l'étape S4, le dispositif de conversion de code encode le signal généré, génère un code correspondant à la trame non autorisée. A l'étape S5, le dispositif de conversion de code fait de la trame normale de la première chaîne de code une trame de la seconde chaîne de code sans la convertir et remplace le code de la trame non autorisée par le code généré de manière à obtenir la trame de la seconde chaîne de code.

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