System and method for payload encoding and decoding
View Patent ↗Systems, methods and apparatuses are disclosed for protecting encoded media data. A minimum set of information needed to encode a single message for an encoded audio signal is loaded separately from the media data into an encoder. A media license file is generated to protect the encoded data, where the underlying information relevant to the media data may be hidden through encryption or other means in order to foster security. The algorithm(s) for encoding may be provided using a shared library, combined with an encoding payload that provides the minimum information set required to form the single message. A partial decoder may apply pattern matching information in the encoded payload in order to confirm that the encoding is actually present and is proper. Accordingly, the payload must be successfully decoded and verified before the underlying data may be decoded.
1. A method to protect audio data in an encoding system, comprising:
determining, using a processor and based on a message to be encoded into audio data, encoding data to select frequencies for encoding the message into the audio data, the encoding data including a previously compiled table of information to encode the message into the audio data, the encoding data not including the message;
generating, using the processor, a license file to correspond to the message to be encoded into the audio data by an encoding device, the license file including the encoding data necessary to select frequencies for encoding the message into the audio data; and
associating the license file with the message and with the encoding device to enable the encoding device to use pattern matching and use the previously compiled table of information to encode the message into the audio data using the encoding data.
2. A method as defined in claim 1 , wherein generating the license file further includes generating the license file to include a security function comprising at least one of: (1) an encryption key, (2) control flow remapping, (3) variable renaming, or (4) an identification code.
3. A method as defined in claim 2 , wherein the security function includes data defining at least one of (1) messages, (2) symbols, and (3) code tone frequencies associated with the audio data.
4. A method as defined in claim 2 , wherein the security function further includes a message code that identifies the encoding device.
5. A method as defined in claim 4 , wherein the message code includes at least one of (1) an identification, (2) an extension, or (3) a layer used to identify the encoding device.
6. A method as defined in claim 1 , wherein generating the license file further includes generating the license file to include a decoding algorithm used to determine if the audio data contains embedded message codes.
7. A method as defined in claim 1 , further including associating the message with a shared library necessary to decode the message from the audio data.
8. A method as defined in claim 1 , wherein the license file includes sufficient symbol or bin information to completely decode the message from the audio data.
9. A method as defined in claim 1 , wherein the encoding device includes a first portion of symbol information or bin information necessary to encode the message into the audio data and the license file includes a second portion of the symbol information or bin information necessary to encode the message into the audio data, the first and second portions of the symbol information or bin information being sufficient to completely encode the message into the audio data.
10. A method as defined in claim 1 , further including transmitting the license file to the encoding device.
11. A system to protect audio data, comprising:
a processor to:
determine, based on a message to be encoded into audio data, encoding data to select frequencies for encoding the message into the audio data, the encoding data including a previously compiled table of information to encode the message into the audio data, the encoding data not including the message;
generate a license file to correspond to the message to be encoded into audio data by an encoding device, the license file including the encoding data; and
associate the license file with the message and with the encoding device to enable the encoding device to use pattern matching and use the previously compiled table of information to encode the message into the audio data using the encoding data.
12. A system as defined in claim 11 , wherein the processor is to generate the license file to include a security function including at least one of: (1) an encryption key, (2) control flow remapping, (3) variable renaming, or (4) an identification code.
13. A system as defined in claim 12 , wherein the security function further includes a message code that identifies the encoding device.
14. A system as defined in claim 13 , wherein the message code includes one or more of (1) an identification, (2) an extension, and (3) a layer used to identify the encoding device.
15. A system as defined in claim 11 , wherein the processor is to generate the license file to include a security function including a decoding algorithm used to determine if the audio data contains embedded message codes.
16. A system as defined in claim 11 , wherein the processor is to associate the message with a shared library necessary to decode the message.
17. A system as defined in claim 11 , wherein the license file includes sufficient symbol or bin information to completely decode the message from the audio data.
18. A system as defined in claim 11 , wherein the encoding device includes a first portion of symbol information or bin information necessary to encode the message into the audio data and the license file includes a second portion of the symbol information or bin information necessary to encode the message into the audio data, the first and second portions of the symbol information or bin information being sufficient to completely encode the message into the audio data.
19. A system as defined in claim 11 , wherein the processor is further to transmit the license file to the encoding device.