Data insertion apparatus and methods for use with compressed...

H - Electricity – 04 – N

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Details

H04N 7/26 (2006.01) H04N 7/50 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2562137

Methods, apparatus, and articles of manufacture for performing data insertion in compressed audio/video data streams are disclosed. A disclosed method receives a digital data stream containing a plurality of compressed media streams associated with a plurality of different media programs and generates information to be inserted in at least one of the compressed media streams. The disclosed method identifies frames of compressed data associated with the at least one of the compressed media streams and inserts the information in at least some of the identified frames of compressed data without performing a decompression operation on the compressed data and by changing locations or values of data bits within the at least some of the identified frames.

Procédés, dispositif et articles pour insertion de données dans des trains de données audio/vidéo compressées. Un procédé de l'invention consiste à recevoir un train de données numériques contenant une pluralité de trames de média compressées en rapport avec une pluralité de programmes de média différents et à générer des informations en vue de les insérer dans au moins une des trames de média compressées. Ce procédé permet d'identifier les trames associées à au moins un des trains de données compressées et à insérer l'information dans au moins certaines des trames identifiées de données compressées sans décompression des données comprimées ni modification des emplacements ou la valeurs des bits de données à l'intérieur d'au moins certaines des trames identifiées.

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