| 摘要 |
A sending method, a receiving method, a sending apparatus, and a receiving apparatus for implementing service data recovery are disclosed, a channel protection method for channels which fail, and a channel protection system with the corresponding sending apparatus and receiving apparatus are disclosed. The channel protection method includes: performing in-band redundancy coding for each service channel that transmits service information; using at least one out-band channel as a protection channel; performing error correction for the service channel through in-band redundancy coding when the service channel generates random or correctible errors; and correcting errors of the service channel through a protection channel when the service channel fails or generates non-correctible errors.
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