DEVICE AND METHOD FOR ENABLING A PMP FOR WIRELESS TRANSMISSION OF MUSIC TO ANOTHER PMP

摘要

The present invention overcomes the above mentioned problems of the prior art. The main object of the invention is for a user with a play for sure music file on his digital music player to provide play access of this music to other device irrespective of codec type and DRM license issue, if any. The only solution needed for playback device is digital to analog converter (DAC) and rendering RAW PCM digital data to DAC whereas all other activities of digital music playback remain with take on device of actual owner of music. No violation of any DRM license issue is envisaged. Also all playable on one digital media player device can be enjoyed from other wireless device using Bluetooth, WiFi, WiMAX or other supported technology. The file format of the music file is extracted on the owner device. If the file is licensed, the license is checked and DRM decryption is done. If the device does not have the license, the license is acquired. If this is successful, the compressed bit stream thus obtained is decoded. The raw PCM data thus obtained is passed to the Play My Music Protocol layer. This layer will take care of the required streaming operations. The Play My Music Protocol layer is responsible for detecting if the other wireless devices have Play My Music capability. If they have the protocol, then the device can send information about its contents. After this stage, the streaming of music data can begin based on request by any of the devices in the network. The receiving devices have to be wireless enabled and need not have the capability of the owner device. Thus the present invention provides a method for enabling a portable media player (PMP) for wireless transmission of music content to another PMP even when the receiver does not have the required codecs, comprising the steps of: extracting a music file on an owner device; acquiring the rights if not already licensed; decoding the music file; arranging the PCM music stream into appropriate packet format according to play my music protocol; passing on the music file to data link layer of WiFi for WiFi format packeting; and transmitting the data to other devices through appropriate wireless link for playing on said other devices.