DATA CARRIAGE IN ENCODED AND PRE-ENCODED AUDIO BITSTREAMS

摘要

A method for a machine or group of machines to carry watermark data in an encoded audio data frame of an audio signal includes receiving the encoded audio data frame having encoded therein a portion of the audio signal. The encoded audio data frame includes a plurality of data blocks, wherein the plurality of data blocks includes, a synchronization information block, at least one encoded data block, and an error check block. The method further includes receiving modified watermark data as modified based on a masking threshold analysis of the audio signal and transforming the encoded audio data frame into a modified encoded audio data frame.

主权项

1. A method for a machine or group of machines to carry watermark data in an encoded audio data frame of an audio signal, the method comprising:
receiving the encoded audio data frame having encoded therein a portion of the audio signal, wherein the encoded audio data frame includes a plurality of data blocks, wherein the plurality of data blocks includes,
a synchronization information block,at least one encoded data block, andan error check block; receiving modified watermark data as modified based on a masking threshold analysis of the audio signal; and transforming the encoded audio data frame into a modified encoded audio data frame by:
inserting at least one additional data block between immediately adjacent data blocks of the encoded audio data frame, wherein the at least one additional data block includes the modified watermark data as modified based on the masking threshold analysis of the audio signal, andmodifying data in the synchronization information block and the error check block to account for the inserting of the at least one additional data block, wherein the modifying includes updating a frame size code included in the synchronization information block to account for an increase in the frame size due to the insertion of the at least one additional block.