Audio decoder, audio encoder, method for providing a decoded audio signal, method for providing an encoded audio signal, audio stream, audio stream provider and computer program using a stream identifier

1. An audio decoder for providing a decoded audio signal representation on the basis of an encoded audio signal representation,

wherein the audio decoder is configured to adjust decoding parameters in dependence on a configuration information,

wherein the audio decoder is configured to decode one or more audio frames using a current configuration information, and

wherein the audio decoder is configured to compare a configuration information in a configuration structure associated with one or more frames to be decoded, with the current configuration information, and to make a transition to perform a decoding using the configuration information in the configuration structure associated with the one or more frames to be decoded as a new configuration information if the configuration information in the configuration structure associated with the one or more frames to be decoded, or a relevant portion of the configuration information in the configuration structure associated with the one or more frames to be decoded, is different from the current configuration information;

wherein the audio decoder is configured to consider a stream identifier information comprised by the configuration structure when comparing the configuration information, such that a difference between a stream identifier previously acquired by the audio decoder and a stream identifier represented by the stream identifier information in the configuration structure associated with the one or more frames to be decoded causes to make the transition.

2. The audio decoder according to claim 1 , wherein the audio decoder is configured to check whether the configuration structure comprises the stream identifier information, and to selectively consider the stream identifier information in the comparison if the stream identifier information is comprised by the configuration structure.

3. The audio decoder according to claim 1 , wherein the audio decoder is configured to check whether the configuration structure comprises a configuration extension structure, and to check whether the configuration extension structure comprises the stream identifier information, and

wherein the audio decoder is configured to selectively consider the stream identifier information in the comparison if the stream identifier information is comprised by the configuration extension structure.

4. The audio decoder according to claim 3 , wherein the audio decoder is configured to accept a variable ordering of configuration information items in the configuration extension structure, and

wherein the audio decoder is configured to consider configuration information items arranged in the configuration extension structure before the stream identifier information when comparing the configuration information in the configuration structure associated with one or more frames to be decoded with the current configuration information, and

wherein the audio decoder is configured to leave configuration information items arranged in the configuration extension structure after the stream identifier information unconsidered when comparing the configuration information in the configuration structure associated with one or more frames to be decoded with the current configuration information.

5. The audio decoder according to claim 4 ,

wherein the audio decoder is configured to identify one or more configuration information items in the configuration extension structure on the basis of one or more configuration extension type identifiers preceding the respective configuration information items.

6. The audio decoder according to claim 3 , wherein the configuration extension structure is a sub-data-structure of the configuration structure, wherein a presence of the configuration extension structure is indicated by a bitof the configuration structure which is evaluated by the audio decoder, and

wherein the stream identifier information is an sub-data-item of the configuration extension structure,

wherein a presence of the stream identifier information is indicated by a configuration extension type identifier associated with the stream identifier information which is evaluated by the audio decoder.

7. The audio decoder according to claim 1 ,

wherein the audio decoder is configured to achieve and process an audio frame representation which comprises a random access information,

wherein the random access information comprises a configuration structure and information for bringing a state of a processing chain of the audio decoder to a desired state,

wherein the audio decoder is configured to cross-fade between an audio information represented by an audio frame processed before arriving at the audio frame representation which comprises the random access information and an audio information derived on the basis of the audio frame representation which comprises the random access information after an initialization of the audio decoder using the configuration structure of the random access information and after adjusting a state of the audio decoder using the information for bringing a state of the processing chain to a desired state if the audio decoder finds that the configuration information in the configuration structure of the random access information, or a relevant portion of the configuration information in the configuration structure of the random access information, is different from the current configuration information.

8. The audio decoder according to claim 7 , wherein the audio decoder is configured to continue decoding without performing a initialization of the audio decoder and without using the information for bringing a state of the processing chain of the audio decoder to a desired state if the audio decoder has decoded an audio frame directly preceding an audio frame represented by the audio frame representation which comprises the random access information and if the audio decoder finds that the relevant portion of the configuration information in the configuration structure of the random access information is equal to the current configuration information.

9. The audio decoder according to claim 7 , wherein the audio decoder is configured to perform an initialization of the audio decoder using the configuration structure of the random access information and to adjust a state of the audio decoder using the information for bringing a state of the processing chain to a desired state if the audio decoder has not decoded an audio frame directly preceding an audio frame represented by the an audio frame representation which comprises the random access information.

10. A method for providing a decoded audio signal representation on the basis of an encoded audio signal representation,

wherein the method comprises adjusting decoding parameters in dependence on a configuration information,

wherein the method comprises decoding one or more audio frames using a current configuration information, and

wherein the method comprises comparing a configuration information in a configuration structure associated with one or more frames to be decoded, with the current configuration information, and wherein the method comprises making a transition to perform a decoding using the configuration information in the configuration structure associated with the one or more frames to be decoded as a new configuration information if the configuration information in the configuration structure associated with the one or more frames to be decoded, or a relevant portion of the configuration information in the configuration structure associated with the one or more frames to be decoded, is different from the current configuration information;

wherein the method comprises considering a stream identifier information comprised by the configuration structure when comparing the configuration information, such that a difference between a stream identifier previously acquired in the audio decoding and a stream identifier represented by the stream identifier information in the configuration structure associated with the one or more frames to be decoded causes to make the transition.

11. A non-transitory digital storage medium having a computer program stored thereon to perform the method for providing a decoded audio signal representation on the basis of an encoded audio signal representation,

wherein the method comprises adjusting decoding parameters in dependence on a configuration information,

wherein the method comprises decoding one or more audio frames using a current configuration information, and

wherein the method comprises comparing a configuration information in a configuration structure associated with one or more frames to be decoded, with the current configuration information, and wherein the method comprises making a transition to perform a decoding using the configuration information in the configuration structure associated with the one or more frames to be decoded as a new configuration information if the configuration information in the configuration structure associated with the one or more frames to be decoded, or a relevant portion of the configuration information in the configuration structure associated with the one or more frames to be decoded, is different from the current configuration information;

wherein the method comprises considering a stream identifier information comprised by the configuration structure when comparing the configuration information, such that a difference between a stream identifier previously acquired in the audio decoding and a stream identifier represented by the stream identifier information in the configuration structure associated with the one or more frames to be decoded causes to make the transition,

when said computer program is run by a computer.