Signal processing apparatus

a technology of signal processing and signal processing, which is applied in the direction of code conversion, color television with bandwidth reduction, television systems, etc., can solve the problems of deteriorating picture quality, difficult to efficiently compress encode both images which can be easily quantized and images which are difficult to quantize, and unstable analog interfaces

Inactive Publication Date: 2007-08-21
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a device that can process signals like videos without converting them into different types of data formats before being processed further. This makes it easier than ever to analyze these converted images more easily compared against previous versions.

Problems solved by technology

This technical problem addressed in this patents relating to compressively encoding high definition images with low bit rates involves achieving efficient compression without compromising resolution when converting compressed signals between different formats due to instability issues during transmission through communication networks.

Method used

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  • Signal processing apparatus
  • Signal processing apparatus
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Embodiment Construction

[0024]An embodiment of the invention will be described hereinbelow. According to the invention, video data is divided into blocks and the DCT is executed every block. When DCT coefficients obtained by the DCT are quantized and the video data is compression encoded, quantization rounding precision of each quantization scale which is used for the quantization in the case where the digital interface is selected as an input interface of the video data and that in the case where the analog interface is selected are set to different precision values, thereby enabling an optimum quantization rounding process to be executed in each case.

[0025]The embodiment which will be described hereinbelow is a preferred specific example of the invention and although various limitations which are technically preferable are added to the embodiment, a scope of the invention is not limited to it in the following description, particularly, unless otherwise there is a disclosure showing that the invention is lim

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Abstract

An optimum quantization rounding process can be executed regardless of which of a digital interface or an analog interface is selected. Which of the analog interface or the digital interface is used as an input interface of a video signal is selected by an operation panel. An input selection signal and a round setting signal are outputted from a system controller. The proper input interface is selected on the basis of the input selection signal and the round setting signal is supplied to an MPEG encoder. In the encoder, quantization rounding precision upon quantization is set in accordance with a quantization scale value and is set in accordance with the selection of the analog interface or the digital interface in response to the round setting signal.

Description

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Claims

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Application Information

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Owner SONY CORP
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