KR970073105A - FRAME SIZE QUADRUPLER FOR VIDEO CODEC - Google Patents

Abstract

The video system includes a preprocessor that decomposes the input video image into idle frequency subbands. The low frequency subbands form a video image smaller than the input image. The standard video encoder compresses the low frequency subbands into a first bit stream conforming to the desired standard. The high frequency subbands are PCM (Pulse Code Modulation) coded and transmitted as separate streams of the second bit, second bit streams or between video frames of smaller images as the first bit streams on the same channel. In the receiver of a video system, a standard video decoder decodes a first bit stream, a PMC decoder decodes a high frequency subband, and a postprocessor combines a low frequency and a high frequency subband to produce a video image larger than the format used by the video encoder. Configure Embodiments of the present invention include software that is added to the current video codec to quadruple the video image frame size and maintain compatibility with the protocol used by the current video codec.

Description

FRAME SIZE QUADRUPLER FOR VIDEO CODEC

As this is a public information case, the full text was not included.

1 is a block diagram of a video system according to an embodiment of the present invention.

Claims (6)

Decomposing a first video image having a first frame size into spatial frequency subbands each having a second frame size smaller than the first frame size, with a first encoder applied to encode a video image of the second frame size Encoding the first of the spatial frequency subbands, transmitting the first encoded bit stream from the first encoder to the receiver using syntax according to the protocol for video images of the second frame size, and spatially to the second encoder Encoding a subband other than the first of the frequency subbands, and transmitting a second encoded bit stream from a second encoder to a receiver. 2. The method of claim 1, further comprising decoding the first encoded bit stream to generate a video image of a second frame size. A video encoder applied to generate a first encoded bit stream from a first video image having a first frame size that is smaller than the second frame size, the second video image having a second frame size as the first video image. Applied to decompose into a nominal frequency subband comprising a first subband provided at, and applied to decompose into a spatial frequency subband comprising a first subband provided to a video encoder, and operable to operate at a video encoder. And a combined subband encoder to receive the second subband from the preprocessor, encode the second subband, and provide a second encoded bit to be transmitted along the first encoded bit stream. And an encoder. 4. The method of claim 3, wherein the subband encoder is further configured to generate a second encoded bit stream from a quantizer operably coupled to the preprocessor and a quantized output of the quantizer to quantize coefficients representing the second subband. And an entropy encoder operatively coupled to the quantizer. A video decoder applied to generate a first video image having a first frame size less than a second frame size from the first encoded bit stream, the video decoder being combined to receive and decode the second bit stream and to generate subband information. A subband decoder for decoding the second bit stream, and a postprocessor operatively coupled to combine the first video image from the video decoder and the subband information from the subband decoder to produce a second video image having a second size Decoder comprising a. 6. The decoder of claim 5, wherein the subband decoder comprises an entropy decoder operatively coupled to receive the second bit stream, the entropy decoder generating quantized coefficients of the array representing the subband information. . ※ Note: The disclosure is based on the initial application.