Geotagging of audio recordings

1. A method of geotagging an audio-recording, comprising:

determining ( 220 ) a location at which the audio-recording was recorded;

obtaining ( 230 ) an image containing an indication of the location, or a reference to a file containing such an image; and

creating ( 215 , 240 ) a single file ( 1 ) containing:

the audio-recording ( 4 ); and

the image ( 8 ) or a reference to a separate file that contains the image,

wherein the indication of the location comprises at least one of:

a map ( 8 a ) that includes the location;

an aerial or satellite photograph that includes the location; and

text ( 8 b ) overlaid on the image to specify the location.

2. The method of claim 1 , wherein the indication of the location comprises a map ( 8 a ) or an aerial or satellite photograph including the location, and

the map or photograph contains a mark ( 8 c ) identifying the position of the location on the map or photograph.

3. The method of claim 1 , wherein the image ( 8 ) is contained in a portion ( 2 ) of the single file ( 1 ) reserved for metadata.

4. The method of claim 3 , wherein the file ( 1 ) is an MP3 file and the image ( 8 ) is embedded in an Attached Picture frame according to the ID3v2 specification.

5. The method of claim 1 , wherein the location at which the audio-recording was recorded is also described in one or more textual or numerical metadata tags of the single file.

6. The method of claim 5 , wherein the single file is an MP3 file and the location is described in a Unique File Identifier frame according to the ID3v2 specification.

7. The method of claim 1 , wherein the image ( 8 ) is provided as a JPEG file ( 6 ) and the location at which the audio-recording was recorded is also described in one or more EXIF metadata tags ( 7 ) of the JPEG file ( 6 ).

8. The method of claim 1 , wherein the location of recording changed during the course of the recording, and wherein the indication of the location describes at least one of:

a plurality of discrete locations;

a location-range, or a trajectory.

9. A non-transitory computer readable medium, having embodied on it a computer program comprising computer program code means adapted to control a computer to perform all the steps of claim 1 if said program is run on the computer.

10. A non-transitory machine-readable medium, having embodied on it a digital audio file ( 1 ) comprising an audio-recording ( 4 ) and an image ( 8 ) or a reference to a separate file that contains an image, wherein the image comprises at least one of:

a map ( 8 a ) that includes a location at which the audio-recording was made;

an aerial or satellite photograph that includes the location; and

text ( 8 b ) overlaid on the image to specify the location.

11. Apparatus for geotagging an audio recording, the apparatus comprising:

a memory ( 32 , 132 ) for storing the audio recording; and

a processor ( 34 , 134 ), adapted to:

determine a location at which the audio recording was made;

obtain an image ( 8 ) indicating the location or a reference to a file containing such an image; and

create, in the memory ( 32 , 132 ), a single file ( 1 ) containing:

the audio-recording ( 4 ); and

the image ( 8 ) or a reference to a separate file that contains the image,

wherein the image indicates the location by means of at least one of: a map ( 8 a ) that includes the location; an aerial or satellite photograph that includes the location; and text ( 8 b ) overlaid on the image to specify the location.

12. Apparatus for geotagging an audio recording comprising:

a memory ( 32 , 132 ) for storing the audio recording; and

a processor ( 34 , 134 ), adapted to:

determine a location at which the audio recording was made; and

create, in the memory, a digital audio file ( 1 ) containing the audio-recording ( 4 ) and one or more metadata tags ( 2 ) describing the location,

wherein the audio file is an MP3 file and the location is described in a Unique File Identifier frame according to the ID3v2 specification.