What does transcoding mean?

Transcoding refers to the conversion between different encodings and is used to convert video signals from one format to another, enabling communication between traditional and emerging devices; for example, many modern Some video conferencing systems are based on the old video coding standard H.263, while the latest video conferencing systems adopt the H.264 baseline specification. Therefore, real-time video transcoding technology is essential to achieve communication between the two. factor.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What does transcoding mean?

Transcoding refers to conversion between different encodings.

If you have an MP3, then your MP3 can only recognize this format, and it cannot read it if you take another format. So transcoding is required.

Video transcoding technology converts video signals from one format to another. It has two important functions for different fields. The first is enabling communication between legacy and emerging devices. For example, many existing video conferencing systems are built based on the old video coding standard H.263, while the latest video conferencing systems adopt the H.264 baseline specification. Therefore, real-time video transcoding technology is an essential factor to achieve communication between the two.

Media formats are divided into: audio transcoding and video transcoding.

Background

From an operational perspective, video transcoding is typically employed within the video infrastructure of a system central office. The most common system implementation requires a main processor to process the network data stream while multiple DSPs handle video encoding and decoding in the transcoding task. Typically, a single video multiport control unit (MCU) has enough power to handle multiple video transcoding channels simultaneously.

For example, Figure 1 shows the basic video transcoding requirements and data flow in a video conferencing system. DSP2 decodes the input video stream and generates reconstructed video frames, which are transmitted to DSP1 through the serial RapidIO interface. Another DSP will encode the reconstructed video frames into the target format. The most common situation is that one terminal of the video conference uses H.263-based equipment, while other terminals use H.264-based equipment.

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