Abstract: An electronic device is provided. The electronic device includes a communication circuitry, memory storing one or more computer programs, and one or more processors operatively connected to the communication circuitry and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors indivudally or collectively, cause the electronic device to establish at least one multimedia broadcast and multicast service (MBMS) subchannel with a mission critical push to talk (MCPTT) server, and, while the at least one MBMS subchannel has been established, sends a message related to switching to a unicast method, to the MCPTT server, if the reception delay time of a control message related to the MBMS subchannel received through a general purpose MBMS subchannel (GPMS) satisfies a specified first switching condition.

Abstract: A method and a system for a sign language translation and descriptive video service are disclosed. The method and system enables an easy preparation of video including a descriptive screen and a sign language so that a hearing-impaired person and a visually impaired person can receive a help for using a video media. The method includes extracting a character string in a text form from a caption of an original video; translating the character string in the text form extracted from the caption of the original video to a machine language; matching the character string translated to the machine language with a sign language video in a database; synchronizing the original video with the sign language video, and mixing the original video and the synchronized sign language video; and editing the sign language video with a sign language video editing tool.

Abstract: A method and a system for a sign language translation and descriptive video service are disclosed. The method and system enables an easy preparation of video including a descriptive screen and a sign language so that a hearing-impaired person and a visually impaired person can receive a help for using a video media. The method includes extracting a character string in a text form from a caption of an original video; translating the character string in the text form extracted from the caption of the original video to a machine language; matching the character string translated to the machine language with a sign language video in a database; synchronizing the original video with the sign language video, and mixing the original video and the synchronized sign language video; and editing the sign language video with a sign language video editing tool.