Real-time encoding signal extraction and display apparatus
AssigneeSony Corporation
InventorIkuo Tsukagoshi
Life of this patent
Estimating the term…
Abstract
In a picture encoding apparatus, pieces of local encoded information generated at signal processing stages for predictive coding picture data are extracted in accordance with a selecting signal and displayed on a screen. A processing condition of the signal processing stages can thus be confirmed in real time, and a processing condition of the local encoded information according to a transmission picture can also be confirmed selectively and visually. Thus the time required for the examination and enhancement of the picture quality of a system can be shortened considerably.
Claims3
A picture encoding-decoding apparatus comprising:
- a preprocessing circuit for converting an input analog video signal into a digital signal, and dividing said digital signal into a plurality of blocks to form a block data signal;
- a block mean value detecting circuit for outputting a mean value data signal dependent on a direct current level in each block from said block data signal;
- a motion vector predictive coding circuit for calculating a motion vector from said block data signal and for outputting a motion vector signal;
- a block coded switching circuit responsive to said block data signal and said motion vector signal, for selecting an encoding process so as to reduce a block power, and then outputting an intra/inter selecting flag, a block power signal, and a speed flag;
- an orthogonal transform circuit responsive to said block coded switching circuit for producing coefficient data;
- a quantization circuit for quantizing said coefficient data and producing a transmit data signal;
- and
- a local decoding circuit arrangement for decoding said transmit data signal comprising:
- an inverse quantization circuit for inverse quantizing said transmit data signal;
- an inverse orthogonal transform circuit responsive to said inverse quantization circuit for inverse orthogonal transforming data and for outputting a local decoded data signal;
- a memory portion for receiving and processing said local decoded data signal, responsive to said intra/inter selecting flag and said motion vector signal;
- and
- a postprocessing circuit responsive to said memory portion for outputting an output analog video signal,
- comprising:
- a local information extracting circuit responsive to a selecting signal for selecting among said mean value data signal, said motion vector signal, said intra/inter selecting flag, said block power signal and said speed flag, and for outputting a local information signal;
- and
- a switching circuit for selecting either the output of said local information extracting circuit or the output of said memory portion;
- and
- a display monitor for displaying the output analog video signal from said postprocessing circuit.
An encoding signal extraction and display apparatus comprising:
- encoding means for encoding an input video data signal and for producing a coded video data signal and a plurality of intermediate encoding signals wherein said coded video data signal comprises a predictive encoding of said input video data signal produced by subjecting said input video data signal to a plurality of successive encoding operations, each encoding operation producing at least one operation result signal, and wherein each of said intermediate encoding signals is comprised of a respective one of said operation result signals;
- decoding means, responsive to said encoding means, for decoding said coded video data signal and for producing a decoded video data signal;
- selecting means, coupled to said encoding means and said decoding means, for selecting among one of said intermediate encoding signals and said decoded video data signal, and for producing a selected signal;
- and
- means, responsive to said selecting means, for visually displaying said selected signal.
Dependencies are inferred from the claim text.