Patent application EP18175912A (EP), filed 2018-06-05
Publication number: EP3416320A1
Title: DEVICES AND METHOD FOR WIRELESSLY BROADCASTING MEDIA PACKETS
Abstract: Aspects of the disclosure provide a wireless encoding device, one or more wireless decoding devices, and a method for wirelessly broadcasting media packets. The wireless encoding device comprises an interface circuit and a controller. The interface circuit is configured to receive a bidirectional control signal and the media packets from a source device. The controller is configured to generate a unidirectional control signal based on the bidirectional control signal to enable each wireless decoding device to receive the media packets from the source device and at least one recovery packet from the interface circuit of the wireless encoding device. The controller also generates at least one recovery packet based on the media packets using an error correction technique to enable the one or more wireless decoding devices to recover distorted media packets received from the source device and to play the decoded media packets.
IPC codes: H04L   1/    16            A I
H04N  21/  6334            A I
H04N  21/  6375            A I
H04L   1/    00            A I
H04W   4/    80            A I
H04N  21/  4363            A I
H04N  21/   442            A I
H04W  12/   047            A I
Claims: number: 1
text: A wireless encoding device, comprising:
number: 2
text: The wireless encoding device of claim 1, wherein the interface circuit is further configured to form a first bidirectional wireless communication channel with the source device based on the bidirectional control signal and to form a recovery unidirectional wireless communication channel with each of the one or more wireless decoding devices based on the unidirectional control signal; and/or
wherein the interface circuit is further configured to transmit at least one recovery packet and the unidirectional control signal and to receive the bidirectional control signal and the media packets using a wireless communication standard.
number: 3
text: The wireless encoding device of claim 1 or 2, wherein the controller is further configured to encrypt the unidirectional control signal.
number: 4
text: The wireless encoding device of any one of claims 1 to 3, further comprising one or more speakers configured to play the media packets.
number: 5
text: The wireless encoding device of any one of claims 1 to 4, wherein the interface circuit is further configured to receive a source response from the source device that is based on one or more player responses received by the source device from the one or more wireless decoding devices, respectively,
wherein preferably the controller is further configured to adjust the error correction technique based on the source response; and/or
wherein the error correction technique is a packet-level forward error correction method.
number: 6
text: A wireless decoding device, comprising:
number: 7
text: The wireless decoding device of claim 6, wherein the interface circuit is further configured to form the media unidirectional wireless communication channel with the source device and the recovery unidirectional wireless communication channel with the wireless encoding device using a wireless communication standard; and/or
wherein the interface circuit further includes a key to decrypt the unidirectional control signal encrypted by the wireless encoding device.
number: 8
text: The wireless decoding device of claim 6 or 7, further comprises one or more speakers to play the decoded media packets.
number: 9
text: The wireless decoding device of any one of claims 6 to 8, wherein the controller further comprises a response processor configured to generate a player response based on packet distortion of the unidirectional wireless communication channels and the interface circuit further comprises a transmitter configured to enable the wireless decoding device to form a second bidirectional wireless communication channel with the source device wherein the unidirectional control signal is transmitted from the wireless encoding device to the source device and then from the source device to the wireless decoding device over the second bidirectional wireless communication channel and the player response is transmitted from the wireless decoding device to the source device over the second bidirectional wireless communication channel and then a source response based on the one or more player responses is transmitted from the source device to the wireless encoding device.
number: 10
text: A method for wirelessly broadcasting media packets, comprising:
number: 11
text: The method of claim 10, further comprising:
number: 12
text: The method of claim 11, wherein the one or more wireless decoding devices are configured to include a key to decrypt the unidirectional control signal encrypted by the wireless encoding device; and/or
wherein the wireless decoding device periodically receives the unidirectional control signal from the wireless encoding device, and the wireless decoding device receives an initial unidirectional control signal from the wireless encoding device via a wired connection.
number: 13
text: The method of claim 11 or 12, further comprising:
number: 14
text: A wireless encoding device, comprising:
number: 15
text: A method for wirelessly broadcasting media packets, comprising:
Office action: search_report, dated 2018-12-19
Rejection reasons: inventive_step_epc_56
Prior art cited: ref_id: US2012058727A1
ref_type: patent
severity: background
ref_id: US2009238375A1
ref_type: patent
severity: background
ref_id: US2009238375
ref_type: patent
severity: obviousness
ref_id: US2012058727
ref_type: patent
severity: obviousness
Final disposition: pending (2018-12-19)