Audio transmitter processor, audio receiver processor and related methods and computer programs for processing an error protected frame

An audio receiver processor for processing an error protected frame, comprising:

• a receiver interface for receiving the error protected frame to acquire a received error protected frame;
• an error protection processor for processing the received error protected frame to acquire an encoded audio frame, wherein the error protection processor is configured to check whether a codeword of a first predefined subset of codewords of the encoded audio frame comprises an error,
• an error concealer configured to perform a frame loss concealment operation in case of a detected error in the first predefined subset of the codewords, or an error concealment indicator configured to generate a frame loss concealment indication in case of a detected error in the first predefined subset of the codewords;
• and
• a frame reader configured for reading the encoded audio frame in accordance with a predefined frame-reading procedure identifying the first predefined subset of the codewords and a second predefined subset of the codewords.

A method of processing an error protected frame, comprising:

• receiving the error protected frame to acquire a received error protected frame;
• performing an error protection processing with the received error protected frame to acquire an encoded audio frame, wherein the error protection processing comprises checking whether a codeword of a first predefined subset of codewords of the encoded audio frame comprises an error, and
• performing a frame loss concealment operation or generating a frame loss concealment indication in case of a detected error in the first predefined subset of the codewords,
• wherein the performing an error protection comprises applying a block decoding operation to the received error protected frame to acquire the first predefined subset of the codewords and a decoded second predefined subset of the codewords, wherein, if the block decoding operation does not signal that an error exists, the performing an error protection comprises calculating a first Hash value from the first predefined subset of the codewords, and comparing the first Hash value to a received first Hash value, wherein the performing an error protection comprises determining that an error exists in the first predefined subset of the codewords when the first Hash value and the received first Hash value do not coincide with each other or determining that the first predefined subset of the codewords is error-free when the first Hash value and the received first Hash value coincide, or
• wherein the performing an error protection comprises applying a block decoding operation to the received error protected frame to acquire the first predefined subset of the codewords and a decoded second predefined subset of the codewords, wherein, if the block decoding operation does not signal that an error exists, the performing an error protection comprises calculating a second Hash value from the decoded second predefined subset of the codewords, and comparing the second Hash value to a received second Hash value, wherein the performing an error protection comprises determining that an error exists in the decoded second predefined subset of the codewords when the second Hash value and the received second Hash value do not coincide with each other or determining that the decoded second predefined subset of the codewords is error-free when the second Hash value and the received second Hash value coincide, or
• wherein the method further comprises reading the encoded audio frame in accordance with a predefined frame-reading procedure identifying the first predefined subset of the codewords and a second predefined subset of the codewords.

A non-transitory digital storage medium having stored thereon a computer program for performing, when said computer program is run by a computer, a method of processing an error protected frame, the method comprising:

• receiving the error protected frame to acquire a received error protected frame;
• performing an error protection processing with the received error protected frame to acquire an encoded audio frame, wherein the error protection processing comprises checking whether a codeword of a first predefined subset of codewords of the encoded audio frame comprises an error, and
• performing a frame loss concealment operation or generating a frame loss concealment indication in case of a detected error in the first predefined subset of the codewords,
• wherein the performing an error protection comprises applying a block decoding operation to the received error protected frame to acquire the first predefined subset of the codewords and a decoded second predefined subset of the codewords, wherein, if the block decoding operation does not signal that an error exists, the performing an error protection comprises calculating a first Hash value from the first predefined subset of the codewords, and comparing the first Hash value to a received first Hash value, wherein the performing an error protection comprises determining that an error exists in the first predefined subset of the codewords when the first Hash value and the received first Hash value do not coincide with each other or determining that the first predefined subset of the codewords is error-free when the first Hash value and the received first Hash value coincide, or
• wherein the performing an error protection comprises applying a block decoding operation to the received error protected frame to acquire the first predefined subset of the codewords and a decoded second predefined subset of the codewords, wherein, if the block decoding operation does not signal that an error exists, the performing an error protection comprises calculating a second Hash value from the decoded second predefined subset of the codewords, and comparing the second Hash value to a received second Hash value, wherein the performing an error protection comprises determining that an error exists in the decoded second predefined subset of the codewords when the second Hash value and the received second Hash value do not coincide with each other or determining that the decoded second predefined subset of the codewords is error-free when the second Hash value and the received second Hash value coincide, or
• wherein the method further comprises reading the encoded audio frame in accordance with a predefined frame-reading procedure identifying the first predefined subset of the codewords and a second predefined subset of the codewords.