# US 12,764,527 B2 · Method and data carrier for transmitting a data stream > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,527 B2 - Document ID: US12764527B2 - Status: Granted - Kind: B2 - Application number: 18/267,265 - Filed: 2021-08-11 - Published: 2024-02-08 - Granted: 2026-10-13 - Earliest claimed: 2020-12-31 - Applicants: Manfred Cuny-Pierron; Daniel Hutter; Reinhold Weber - Inventors: Manfred Cuny-Pierron; Daniel Hutter; Reinhold Weber - Web page: https://patentgrep.com/patent/US12764527B2 ## CPC - H04W 12/06: Authentication - H04B 5/26: using coils - H04W 12/108: Source integrity - H04W 76/15: Setup of multiple wireless link connections - H04B 5/70: specially adapted for specific purposes - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Method for transmitting a data stream between a mobile data carrier and a playback device, in which authentication data for setting up a second transmission channel from the data carrier to the playback device is transmitted via a first transmission channel set up between the data carrier and the playback device by an electromagnetic field emitted by the playback device. Following verification of authentication data, the second transmission channel is set up, via which the data stream is transmitted from the data carrier to the playback device by a radio signal from a transmitting antenna of the data carrier. The power supply to the transmitting antenna is provided via the first transmission channel, and the second transmission channel is maintained only as long as the first transmission channel is maintained. ## Claims ### Claim 1 A method for transmitting a data stream between a mobile data carrier and a playback device for the transmitted data, the method comprising: transmitting, via a first transmission channel between the mobile data carrier and the playback device, which is set up by an electromagnetic field emitted by the playback device and electromagnetic induction in the mobile data carrier, authentication data for setting up a second transmission channel from the mobile data carrier to the playback device, and following verification of the authentication data, setting up the second transmission channel between the mobile data carrier and the playback device, wherein the data stream from the mobile data carrier to the playback device is transmitted via the second transmission channel by a radio signal from a transmitting antenna of the mobile data carrier, wherein power is supplied to the transmitting antenna of the mobile data carrier via the first transmission channel, and wherein the second transmission channel is maintained only as long as the first transmission channel, whose maintenance depends on a spatial distance between the mobile data carrier and the playback device, is maintained. ### Claim 2 (depends on 1) The method according to claim 1, wherein the authentication data contains identification information for identifying the mobile data carrier, and the verification of the authentication data is carried out with the aid of the identification information, wherein the playback device is a mobile terminal having a mobile application which sends the identification information transmitted via the first transmission channel to a central data processing device, and whereby, following verification of the identification information by the central data processing device, the second transmission channel is set up between the mobile data carrier and the playback device. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first transmission channel is an NFC (Near Field Communication) transmission channel. ### Claim 4 (depends on 1) The method according to claim 1, wherein the second transmission channel is a Bluetooth, WLAN or UWB transmission channel. ### Claim 5 (depends on 4) The method according to claim 4, wherein the authentication data contains Bluetooth, WLAN or UWB authentication data for setting up the second transmission channel. ### Claim 6 (depends on 1) The method according to claim 1, wherein the data stream transmitted via the second transmission channel is audio-visual streaming data. ### Claim 7 A data carrier comprising: a data memory retrievable by a playback device, an inductive element configured for setting up a first transmission channel for retrieving authentication data of the data carrier and for inducing a current by an external electromagnetic field, and a transmitting antenna for establishing a second transmission channel for transmitting a data stream from the data memory, wherein the data carrier is configured with a token-shaped body, and wherein a power supply of the transmitting antenna is formed by the inductive element. ### Claim 8 (depends on 7) The data carrier according to claim 7, wherein the token-shaped body is disk-shaped with a radius of 1.5-3.5 cm and a thickness of 1-5 mm. ### Claim 9 (depends on 7) The data carrier according to claim 7, wherein the inductive element is designed as an electrical conductor wound around a center of the token-shaped body. ### Claim 10 (depends on 7) The data carrier according to claim 7, wherein the inductive element is designed as an NFC-enabled element and the transmitting antenna is designed as a Bluetooth-, WLAN- or UWB-enabled transmitting antenna. ### Claim 11 (depends on 7) The data carrier according to claim 7, wherein the authentication data contains identification information for identifying the mobile data carrier, and the verification of the authentication data is carried out with the aid of the identification information, wherein the playback device is a mobile terminal having a mobile application which sends the identification information transmitted via the first transmission channel to a central data processing device, and whereby, following verification of the identification information by the central data processing device, the second transmission channel is set up between the data carrier and the playback device.