Patent ID: 9667365
Date: 2017-05-30
CPC Classifications: G10L,G11B,H04H

Claim:
1. A method to transform media to include an encoding, the method comprising: detecting, by executing an instruction with a processor, a first encoding in received audio samples, the first encoding including a first synchronization symbol and symbols of a first identification code, the first encoding having been encoded based on a first look-up table correlating the symbols of the first encoding with a first set of frequencies of the audio samples to be modified to encode the first synchronization symbol and the symbols of the first identification code in the audio samples; in response to the detection of the first encoding, generating, by executing an instruction with the processor, a pre-existing code flag including a pre-existing code flag synchronization symbol and symbols a second identification code, the pre-existing code flag generated based on a second look-up table correlating the pre-existing code flag synchronization symbol and the symbols of the second identification code with a second set of frequencies of the audio samples to be modified to encode the pre-existing code flag synchronization symbol and the symbols of the second identification code in the audio samples, the second look-up table including at least some symbol to frequency correlations different from the first look-up table; encoding, by executing an instruction with the processor, the pre-existing code flag in the audio samples to transform the audio samples into encoded audio samples including the first encoding and the pre-existing code flag; and storing, by executing an instruction with the processor, the encoded audio samples in a tangible memory.