Wide-band multi-format audio/video production system with frame-rate conversion
Wide-band multi-format audio/video production system with frame-rate conversion and methods performed by the audio/video production system. Compressed video content corresponding to an original format of a video program is processed to generate uncompressed video content in an internal format having a frame rate of 24 frames per second (fps) comprising progressive frames of pixel image data having an original pixel resolution. Progressive frames of pixel image data are buffered in a high-capacity memory buffer supporting asynchronous random read and write access. The progressive frames of pixel image data in the buffered progressive frames are processed to perform a frame-rate conversion from 24 fps to a higher output frame rate to produce progressive frames of converted video content having an uncompressed format. The progressive frames of converted video content are the stored in a compressed video format to produce a converted video program having a converted frame rate in accordance with the higher output frame rate.
1. A method for converting the format of a video program, comprising:
receiving or retrieving compressed video content comprising a video program in an original compressed format;
decompressing the compressed video content to generate uncompressed video content in an internal format having a frame rate of 24 frames per second (fps) comprising progressive frames of pixel image data having an original pixel resolution;
buffering progressive frames of pixel image data in a high-capacity memory buffer supporting asynchronous random read and write access;
processing the progressive frames of pixel image data in the buffered progressive frames to perform a frame-rate conversion from 24 fps to a higher output frame rate to produce progressive frames of converted video content having an uncompressed format; and
storing the progressive frames of converted video content in a compressed video format to produce a converted video program having a converted frame rate in accordance with the higher output frame rate,
wherein the converted video content of the converted video program is configured to be processed by a video playback apparatus to generate a digital HDTV video signal configured to display the converted video program on an HDTV at the higher output frame rate, and wherein the digital HDTV video signal is a progressive signal having a pixel resolution of at least 1920×1080 pixels.
2. The method of claim 1 , wherein the frame-rate conversion comprises repeating each frame in the 24 fps internal production format an integer multiple of times to produce a converted video program having an output frame rate that is an integer multiple of 24 fps.
3. The method of claim 2 , wherein the output frame rate is 96 fps.
4. The method of claim 1 , further comprising employing pixel interpolation hardware to perform an up-conversion of the original pixel resolution to a pixel resolution of 3840×2160 pixels.
5. The method of claim 1 , wherein the original pixel resolution is less than 1920×1080 pixels, the method further comprising employing pixel interpolation hardware to perform an up-conversion of the original pixel resolution to a pixel resolution of 1920×1080 pixels.
6. The method of claim 1 , further comprising performing inter-frame interpolation of progressive frame pixel image data to perform the frame rate conversion.
7. The method of claim 1 , wherein the compressed video content has an original frame rate that is different than 24 fps, the method further comprising:
decompressing the compressed video content to generate frames of pixel image data; and
processing the frames of pixel image data using the memory buffer to perform a frame rate conversion from the original frame rate to 24 fps.