摘要:
Wide-band multi-format audio/video recording and production system with frame-rate conversion and methods performed by the audio/video production system. In one aspect, a method is performed by a portable video image recording device including an image sensor and high-capacity digital storage means supporting asynchronous access for recording and reproducing. The image sensor receives an input video image and the output of the image sensor is sampled using a sampling frequency of at least 30 megahertz to generate frames of video image data employing a first frame rate and having a first image dimension in pixels. A video program is recorded by processing the frames of video image data and storing video program content in a compressed progressive format using the high-capacity digital storage means. Concurrent to recording the video program, video image data is manipulated in real-time on a selective basis to output video content in an output video format having a second frame rate different than the first frame rate.
摘要:
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.
摘要:
A multi-format digital video production system enables a user to process an input video program to produce an output version of the program in a final format which may have a different frame rate, pixel dimensions, or both. An internal production format of 24 fps is preferably chosen to provide the greatest compatibility with existing and planned formats associated with HDTV standard 4:3 or widescreen 16:9 high-definition television, and film. Images are re-sized horizontally and vertically by pixel interpolation, thereby producing larger or smaller image dimensions so as to fill the particular needs of individual applications. Frame rates are adapted by inter-frame interpolation or by traditional schemes, including “3:2 pull-down” for 24-to-30 fps conversions. Simple speed-up (for 24-to-25 conversions) or slow-down (for 25-to-24 conversions) for playback, or by manipulating the frame rate itself using a program storage facility with asynchronous reading and writing capabilities. The step of converting the signal to a HDTV format is preferably performed using a modified upconversion process for wideband signals (utilizing a higher sampling clock frequency) and a resizing to HDTV format frame dimensions in pixels.
摘要:
The gateway video signal is generated from inputted frames which represent a motion picture when reproduced at a real-time rate. The inputted frames are sped up to 1.2 or 1.25 times the real-time rate. The sped up frames are, then, converted to 60 field/second, thereby generating the gateway video signal.
摘要:
A television signal format converter is provided for converting without loss of picture information a television format or a motion picture film image format to or from a given recorder/player format. An interface converts between RGB and luminance/chrominance inputs and between analog and digital inputs. The interface couples a source signal format to a plurality of pairs of memories. A clock and control circuit controls addressing of the memories for reading and writing so that conversion is performed between a source format and the format required for a given high definition digital video tape recorder or any other comparable recorder.
摘要:
A system for integrating film material with a digital video signal employs a film scanner to produce a digital video signal from the source film, and a post production system for combining with that signal the input digital video signal. Motion interpolated temporal compensation is employed at stages of frame rate conversion.
摘要:
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.
摘要:
A multi-format digital video production system enables a user to process an input video program to produce an output version of the program in a final format which may have a different frame rate, pixel dimensions, or both. An internal production format of 24 fps is preferably chosen to provide the greatest compatibility with existing and planned formats associated with HDTV standard 4:3 or widescreen 16:9 high-definition television, and film. Images are re-sized horizontally and vertically by pixel interpolation, thereby producing larger or smaller image dimensions so as to fill the particular needs of individual applications. Frame rates are adapted by inter-frame interpolation or by traditional schemes, including “3:2 pull-down” for 24-to-30 fps conversions. Simple speed-up (for 24-to-25 conversions) or slow-down (for 25-to-24 conversions) for playback, or by manipulating the frame rate itself using a program storage facility with asynchronous reading and writing capabilities. The step of converting the signal to a HDTV format is preferably performed using a modified upconversion process for wideband signals (utilizing a higher sampling clock frequency) and a resizing to HDTV format frame dimensions in pixels.
摘要:
An audio/video production system facilitates professional quality image manipulation and editing. A program input may be translated into any of a variety of graphics or television formats, including NTSC, PAL, SECAM and HDTV, and stored as data-compressed images, using any of several commercially available methods such as Motion JPEG, MPEG, etc. While being processed, the images may be re-sized to produce a desired aspect ratio or dimensions using conventional techniques such as pixel interpolation, and signals within the video data stream optionally may be utilized to control "pan/scan" operations at a receiving video display unit, in case this unit does not have the same aspect ratio as the source signal. Other information may be utilized to. restrict playback of the program material based on predetermined regional or geographical criteria. Frame rate conversion to and from conventional formats is performed by using the prevailing techniques employed for film-to-NTSC and film-to-PAL transfers, or by inter-frame interpolation, all well known in the art, or by reproduction of the program at a selected non-standard frame rate, optionally combined with these prevailing techniques. By judicious selection of the optimal digitizing parameters, the system allows a user to establish an inter-related family of aspect ratios, resolutions, and frame rates, yet remain compatible with currently available and planned graphics and television formats.