Video recording method for photographic hand-held equipment

A handheld device and video recording technology, which is applied in the direction of image communication, color TV parts, TV system parts, etc., can solve the problems of uncontrollable, video recording time limit, RAM can not be recycled, etc., to ensure synchronization, Save memory space and improve efficiency

Inactive Publication Date: 2007-03-21
KONKA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using Motion Jpeg video recording is that the audio files cannot be recorded synchronously
Generally, the recording of Motion Jpeg is directly controlled by the internal hardware of the backend IC. The RAM in the backend IC can only be used to temporarily store all the Motion Jpeg data. The handheld device cannot control the RAM, and the RAM cannot be recycled, resulting in a long recording time. Limited by the internal RAM size of the backend IC, it is impossible to achieve unlimited video recording
And the Backend IC only includes a video processing unit, not an audio processing unit, which in turn leads to the inability to synchronize audio and video

Method used

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  • Video recording method for photographic hand-held equipment
  • Video recording method for photographic hand-held equipment
  • Video recording method for photographic hand-held equipment

Examples

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Embodiment Construction

[0026] A specific embodiment of the video recording method of a camera handheld device of the present invention may include four processes, namely a start-up process, a recording process, a background processing process and an end process.

[0027] 1. The startup process is shown in Figure 1. When the start-up process of audio and video recording begins, the system first checks whether the space of the system RAM memory and the flash memory can meet the needs of recording, if no, the start-up process is ended, and if it is, the AVI file and buffer area are established:

[0028] Create two files in the flash memory, one is used to save AVI video data and audio data, and the other is an AVI data index file.

[0029] Apply for two audio and video data buffers of the same size in the system RAM memory at one time. The first audio and video data buffer is used to temporarily store audio and video recording data, and the second audio and video data buffer is used to write audio to t...

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Abstract

A video recording method of hand shooting device includes applying two audio / video data buffer regions once from system RAM storage, placing audio / video data into the first audio / video data buffer region when audio / video recording is carried out, interchanging flag of the first and the second audio / video data buffer regions when the first audio / video data buffer region is full in order to use the first said region to store audio / video data continuously and write data in the second said region into flash storage for utilizing audio / video data buffer region in system RAM cyclically.

Description

[technical field] [0001] The invention relates to a video recording method, in particular to an infinite time video recording method of a hand-held device with a camera function. [Background technique] [0002] Hand-held devices with a camera function include mobile phones and PDAs that can take pictures, and the principles of taking pictures are basically the same. The processing capabilities of these handheld devices with camera functions are generally weak, so the overall hardware solution is mostly: handheld device main chip + front-end image processing chip (Backend IC) + image sensor (Sensor). Among them, the Backend IC completes the acquisition of Sensor data and Jpeg compression. In order to make the handheld device not only have a camera function but also video recording, a technology of using the Motion Jpeg format to realize video recording has emerged. The downside of recording with Motion Jpeg is that the audio file cannot be recorded simultaneously. Generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/76G11B27/10
Inventor 张雷
Owner KONKA GROUP
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