# Glossary

  • AppKey
    AppKey is the unique identification of the application in the Juphoon Cloud platform, which is similar to the application ID and obtained by creating an application on the platform.

  • Domain
    When creating an application, multiple applications created in the same console account belong to the same domain. Applications in the same domain can communicate with each other. Therefore, people who use applications under the same account can communicate with each other even if their AppKey is different. For example, from A user logged in by one application can call a user logged in by another application.

  • No authentication
    No authentication mode means that the account is generated by the user, and no password verification is required to log in to the Juphoon Cloud platform.

  • JC SDK
    JC SDK is a functional development kit rendered by Juphoon, providing real-time communication scenarios such as voice calls, video calls, live interactive audio streaming, live interactive video streaming, and IM. JC SDK supports operating system platforms such as iOS, Android, Windows, and macOS.

  • Console
    The console is a platform for application creation and management provided by Juphoon for users. After registering an account, users can create applications through the console, obtain AppKey, check the domain and domain ID of the application, call duration, ringing rate, success rate, etc.

  • SDK keywords
    The JC SDK implements functions such as audio and video calls or live streaming through API methods and event callbacks.

  • Method
    The interface provided by the SDK can be called by the client-side to implement specific functions.

  • Callback
    Indicate feedbacks from the SDK to the client-side after certain events occur.

  • Channel
    Channel is similar to the concept of a room and users join in the same channel can make one-to-one or group audio and video calls. You can call the API to create a channel. The channel is automatically created when the first user joins, and the channel is automatically destroyed when the last user leaves without maintenance.

  • Audio and video streaming
    Refers to an object containing audio and video data. In calls and live streaming, users can send local audio and video streams and subscribe to other users’ audio and video streams.

  • Subscription
    After users join the channel, they can receive audio and video streams published by other users in the channel, that is, subscription streams.

  • Live streaming
    A type of channel mode. There are two roles in the live streaming mode: one is host, and the other is audiences. Live streaming refers to broadcasting live performances through applications and the Internet. The viewers is called the audiences, and the performer is called the host.

  • Host
    Users who can send and receive audio and video streams in live channels.

  • Audience
    Users who can only receive audio and video streams in the live channel.

  • Co-hosting
    In live streaming, the audience interacts with the host through co-hosting.

  • Frame rate
    Frame rate is the frequency (rate) at which bitmap images called frames continuously appear on the display. Simply put, the frame rate is the number of pictures taken by the camera per second. The higher the number of frames, the smoother the picture. The smaller the frame rate, the more jumpy the picture.

  • Bit rate
    Bit rate means the number of bits transmitted per second. That is, the amount of data transmitted per unit time of the video. Usually in bit/s. The bit rate directly affects the viewing experience of the video. The higher the bit rate, the higher the definition. But at the same time, occupy too much bandwidth and is prone to congestion.

  • Resolution rate
    Resolution is a concept that represents the fineness of a plane image. It is usually measured by the number of horizontal and vertical points, expressed in the form of the number of horizontal points × the number of vertical points. In a fixed plane, the higher the resolution, the more points that can be used, and the more detailed the image. The resolution rate affects the image size: the higher the resolution, the larger the image; the lower the resolution, the smaller the image.

  • Heartbeat
    A way to keep alive on the conference terminal and the server is to send and return heartbeat packets to the peer terminal regularly.

  • Heartbeat duration
    Heartbeat duration refers to how often heartbeat packets are sent.

  • Heartbeat timeout
    Heartbeat timeout refers to the timeout period (thinking that the other party has left) without receiving a heartbeat packet.

  • CDN push
    The process of publishing a video stream to the CDN (Content Delivery Network) is called CDN push, and users can watch it online through a web browser.

    CDN is equivalent to a layer of intelligent virtual network on the basis of the existing Internet formed by placing node servers everywhere in the network. CDNs redirect user requests to the service node which is closest to the user, aiming at making the user access the needed nearby content to solve the congestion of the Internet network and improve the response speed of users visiting the website.

  • Recording
    Recording during audio and video calls and saving the video stream as a file to provide users with a review.