Abstract: Disclosed is a method, system, and non-transitory computer-readable record medium for creating a chatroom according to a condition. The chatroom creation method may include providing an instant messaging service; registering a chatroom creation condition related to a specific account of the instant messaging service; retrieving at least one account of accounts of the instant messaging service that meets the chatroom creation condition; and automatically creating a chatroom of the specific account joined by the retrieved accounts.

Abstract: A method, a system, and a non-transitory computer-readable record medium for providing a communication using a video call bot are disclosed. A video call method implemented by a computer apparatus, may include: in response to a request for inviting a chat bot to a video call in which a plurality of users comprising a user of the computer apparatus participate, displaying the chat bot on a display screen for the video call; transmitting, to a server, a command line that is associated with the chat bot and is extracted from an a voice input that is input to the computer apparatus during the video call; and in response to the command line, outputting a response to the command line through the chat bot that participates in the video call.

Abstract: Provided is a method of measuring quality of a video call between a transmitting terminal including processing circuitry and a receiving terminal, the method including processing, by the processing circuitry, original frames included in an original video based on a video call service; replacing, by the processing circuitry, real-time video frames acquired from a camera for a video call with a receiving terminal with at least a portion of the original frames; and transmitting, by the processing circuitry, the portion of the original frames to the receiving terminal as frames for the video call with the receiving terminal through the video call service.

Abstract: Disclosed is a method, system, and non-transitory computer-readable record medium for verifying a nearby friend based on a short-range wireless communication. A method of verifying a nearby friend based on a short-range wireless communication includes collecting, using processing circuitry, a plurality of device identifiers using short-range wireless communication, the plurality of device identifiers identifying a plurality of other electronic devices, transferring, using the processing circuitry, at least a portion of the plurality of device identifiers to a server, acquiring, using the processing circuitry, at least one social identifier from the server, each of the at least one social identifier being associated with a respective social network service (SNS) account, the at least one social identifier corresponding to the portion of the plurality of device identifiers, and providing the at least one social identifier through an interface of the electronic device.

Abstract: A method for providing a location based avatar messenger service includes transmitting, by a user terminal, location information of the user terminal to an external system; receiving, by the user terminal, information on users located in a vicinity of the user terminal from the external system; obtaining, by an image sensor of the user terminal, at least one image; and displaying, on a display of the user terminal, the at least one image and a first set of avatars associated with the users located in the vicinity such that the first set of avatars is superimposed on the at least one image, the first set of avatars including one or more avatars, the one or more avatars corresponding, respectively, to one or more users from among the users located in the vicinity.

Abstract: Disclosed are methods, systems, and/or a non-transitory computer-readable record mediums for producing a video based on a bot enabling a user feedback. A video production method may include receiving a plurality of images uploaded to a chatroom in response to a bot for a video production being added to the chatroom and the chatroom including at least one user, creating at least one primary video clip using at least two images among the plurality of images, creating a single video using the at least one primary video clip, and providing the created single video to the chatroom.

Abstract: Payment methods and systems for processing a payment using a Central Bank Digital Currency (CBDC) without a double payment in an offline situation (e.g., in a situation in which a terminal of a user is unable to be connected) to a server through a network may be provided.

Abstract: A method and a system for performing a group call using unicast and multicast are provided. A group call method performed by a first client device, may include: establishing a media session with a server providing a group call service based on a group call request from the first client device; transmitting, to the server through the media session, at least one first packet including a first source identifier of the first client device; providing a user interface at the first client device, that enables selecting at least one second client device from a plurality of second client devices that participate in a group call initiated by the first client device; and transmitting, from the first client device to the server, at least one second packet including a second source identifier of the selected at least one second client device as a destination of data included in the at least one second packet.

Abstract: Disclosed is a method, system, and non-transitory computer-readable storage medium for providing a pickup location. The pickup service method executable on a computer system, including displaying, by the at least one processor, one or more pickup candidate locations corresponding to a location associated with a user of an electronic device, on a map screen including the location, providing, by the at least one processor, guidance information on a pickup candidate location, which is selected by the user from among the one or more pickup candidate locations, on the map screen, and transmitting, by the at least one processor to a server, a pickup request including a final pickup candidate location that is selected by the user from among the one or more pickup candidate locations displayed on the map screen as a pickup location may be provided.

Abstract: A method is provided. The method includes based on an online meeting ending, receiving, by a user terminal, a link for creating a meeting note for the online meeting from an external device; based on a first user input of selecting the link for creating the meeting note, displaying a user interface for creating the meeting note on a display of the user terminal; receiving at least one second user input within the user interface for creating the meeting note; and transmitting information associated with the at least one second user input to the external device to control the external device to share the meeting note created based on the at least one second user input with at least one participant of the online meeting.

Abstract: A method of video quality evaluation includes obtaining, by the at least one processor, a reference area of a reference video and a degraded area of a degraded video, based on a matching area of the reference video and the degraded video, using homography estimation; correcting, by the at least one processor, at least one of the reference area and the degraded area; and measuring, by the at least one processor, video quality of the degraded video by comparing a difference between the reference area and the degraded area through a full reference scheme.

Abstract: A method, system, and non-transitory computer-readable record medium for providing chatroom embedded content are provided. The method implemented by a computer system including at least one processor configured to execute computer-readable instructions stored in a memory, includes receiving a request for entering a chatroom; and displaying content related to the chatroom based on a system message of the chatroom in response to entering the chatroom.

Abstract: Disclosed are methods, systems, and non-transitory computer-readable record mediums for processing a chatroom based on a level of use. A chatroom processing method including verifying a level of use by a user with respect to each chatroom of chatrooms included in a chatroom list, selecting at least one chatroom from the chatroom list as a chatroom to be managed based on the level of use, and processing the chatroom to be managed to be distinguished from remaining chatrooms in the chatroom list may be provided.

Abstract: A noise cancellation method including generating a first voice signal by canceling a first portion of noise included in an input voice signal using a first network, the first network being a trained u-net structure, and the first portion of the noise being in a time domain, applying a first window to the first voice signal, performing a fast Fourier transform on the first windowed voice signal to acquire a magnitude signal and a phase signal, acquiring a mask using a second network based on the magnitude signal, the second network being another trained u-net structure, applying the mask to the magnitude signal, generating a second voice signal by canceling a second portion of the noise by performing an inverse fast Fourier transform on the first windowed voice signal based on the masked magnitude signal and the phase signal, and applying a second window to the second voice signal.

Abstract: A transaction processing system may include: a plurality of leaf chains including a first leaf chain and a second leaf chain, the first leaf chain and the second leaf chain including a first leaf chain manager contract and a second leaf chain manager contract, respectively; a root chain comprising a root chain manager contract for the root chain, a first leaf chain contract for the first leaf chain, and a second leaf chain contract for the second leaf chain; and at least one relayer located between the root chain and the plurality of leaf chains, and configured to process a remittance request from the first leaf chain to the second leaf chain.

Abstract: Disclosed are a methods and/or systems for hybrid video coding. A hybrid video coding method may include generating scaled-down video frames by scaling down frames of an original video, generating a stream of a first layer by encoding the scaled-down video frames using a first encoder of a software codec, and generating a stream of a second layer using the frames of the original video and a second encoder of a hardware codec.

Abstract: Disclosed is a method, system, and non-transitory computer-readable record medium for protecting content copyright in a chatroom. A content protection method includes adding, by at least one processor, a mark to content in a chatroom, the mark including chatroom information for identifying the chatroom in response to a user request from a user associated with the content in the chatroom, and executing, by the at least one processor, a function corresponding to the user request using the content to which the mark is added.

Abstract: A method and a system for performing a group call using unicast and multicast are provided. A group call method performed by a first client device, may include: establishing a media session with a server providing a group call service based on a group call request from the first client device; transmitting, to the server through the media session, at least one first packet including a first source identifier of the first client device; providing a user interface at the first client device, that enables selecting at least one second client device from a plurality of second client devices that participate in a group call initiated by the first client device; and transmitting, from the first client device to the server, at least one second packet including a second source identifier of the selected at least one second client device as a destination of data included in the at least one second packet.

Abstract: A method for providing relevance information between users performed by one or more processors of a user terminal including receiving, from a user, a request for the relevance information between a first user account and a second user account of an instant messaging application from a user of the user terminal, collecting message information in a group chat room that includes the first user account, the second user account, and one or more additional user accounts, extracting a conversation between the first user account and the second user account from the collected message information, and displaying the extracted conversation between the first user account and the second user account along with information on the group chat room on a display of the user terminal, in which the first user account is associated with the user terminal, may be provided.