Decoder for decoding a media signal and encoder for encoding secondary media data comprising metadata or control data for primary media data

A decoder for decoding a media signal comprising a received stream of digital words representing encoded secondary media data comprising metadata or control data for primary media data and a reference pattern indicating a reference amplitude or a predetermined timing instant in the primary media data;

• wherein the decoder is configured to recover the secondary media data, wherein the recovering comprises
• analyzing the reference pattern to calculate and compensate an amplification or attenuation or a DC offset applied to the stream of digital words;
• or
• converting a sample rate associated with the digital words, according to the predetermined timing instant of the primary media data indicated in the reference pattern, to a predetermined sample rate
• to acquire recovered secondary media data,
• wherein the decoder is configured to derive a bitstream from the recovered secondary media data.

A method for decoding a media signal comprising a received stream of digital words representing encoded secondary media data comprising metadata or control data for primary media data and a timing reference pattern indicating a timing instant in the primary media data, the method comprising:

• recovering the secondary media data, wherein the recovering comprises
• analyzing the reference pattern to calculate and compensate an amplification or attenuation or a DC offset applied to the stream of digital words or
• converting a sample rate associated with the digital words, according to the predetermined timing instant of the primary media data indicated in the reference pattern, to a predetermined sample rate
• to acquire recovered secondary media data;
• and
• deriving a bitstream from the recovered secondary media data.

A method for encoding secondary media data comprising metadata or control data for primary media data, the method comprising:

• grouping a bitstream of secondary media data to form grouped secondary media data, representing data words;
• generating a reference pattern indicating a reference amplitude or a predetermined timing instant in the primary media data;
• low-pass filtering the data words and the reference pattern to acquire data pulses comprising a length of more than one sample of a predetermined sample rate, wherein an amplitude of a data pulse is weighted according to the grouped secondary media data or data words, and wherein the filter is configured to add up consecutive weighted data pulses at instants of the predetermined sample rate to acquire the stream of digital words
• outputting the encoded secondary media data as the stream of digital words.

A non-transitory digital storage medium having a computer program stored thereon to perform a method for decoding a media signal comprising a received stream of digital words representing encoded secondary media data comprising metadata or control data for primary media data and a timing reference pattern indicating a timing instant in the primary media data, the method comprising:

• recovering the secondary media data, wherein the recovering comprises:
• analyzing the reference pattern to calculate and compensate an amplification or attenuation or a DC offset applied to the stream of digital words, or
• converting a sample rate associated with the digital words, according to the predetermined timing instant of the primary media data indicated in the reference pattern, to a predetermined sample rate,
• to acquire recovered secondary media data;
• and
• deriving a bitstream from the recovered secondary media data,
• when said computer program is run by a computer.

A non-transitory digital storage medium having a computer program stored thereon to perform a method for encoding secondary media data comprising metadata or control data for primary media data, the method comprising:

• grouping a bitstream of secondary media data to form grouped secondary media data, representing data words;
• generating a reference pattern indicating a reference amplitude or a predetermined timing instant in the primary media data;
• low-pass filtering the data words and the reference pattern to acquire data pulses comprising a length of more than one sample of a predetermined sample rate, wherein an amplitude of a data pulse is weighted according to the grouped secondary media data or data words, and wherein the filter is configured to add up consecutive weighted data pulses at instants of the predetermined sample rate to acquire the stream of digital words,
• outputting the encoded secondary media data as the stream of digital words,
• when said computer program is run by a computer.