Image Re-Coding Control for Consecutive H.264 Clip Playback

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Solution Overview

Problem

The existing H.264 image coding method faces challenges with high processing loads and complex controls due to real-time re-coding requirements, particularly when standard violations occur, leading to data delays and increased power consumption.

Innovation Solution

An image coding/recording apparatus that includes a re-coding control unit to manage and re-code data that does not meet predetermined conditions, allowing for consecutive reproduction of re-coded and non-re-coded data, thereby avoiding simultaneous general coding and re-coding processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If real-time re-coding is performed when standard violations occur, then coding quality is maintained, but processing load and device complexity increase significantly

Engineering Contradiction:

Improvecoding qualityVSAvoidprocessing load

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs preliminary detection of standard violations during the coding process and prepares re-coding in advance by identifying violation patterns and pre-configuring re-coding parameters, rather than waiting for violations to occur and then reacting in real-time

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The re-coding function is extracted as a separate post-processing step from the main coding pipeline. The determination unit identifies violations, and the re-coding is performed on extracted problematic segments, separating the detection and correction functions from the primary coding operation

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If real-time re-coding is performed when standard violations occur, then coding quality is maintained, but power consumption increases

Engineering Contradiction:

Improvecoding qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuously performing re-coding operations, the system applies partial action by only re-coding segments where standard violations are detected. The determination unit identifies specific violation instances, and re-coding is performed selectively on those portions rather than on the entire coded stream

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

Inventive Principle:

Principle #10Preliminary action

3Reliability

If simultaneous general coding and re-coding processes are performed, then coding quality is maintained, but control complexity increases

Engineering Contradiction:

Improvecoding qualityVSAvoidcontrol complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The coding process is segmented into distinct phases: initial coding, violation detection, and selective re-coding. The determination unit segments the coded stream into compliant and non-compliant portions, allowing independent processing of each segment with different control requirements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The determination unit acts as an intermediary between the coding unit and the re-coding process. It analyzes the coded data, identifies standard violations, and generates control signals that regulate when and how re-coding should be performed, simplifying the overall control architecture

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If data delays occur due to re-coding processing, then coding quality is maintained, but reproduction continuity is affected

Engineering Contradiction:

Improvecoding qualityVSAvoiddata delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The re-coded data is generated as a separate copy (Bridge Clip file) of the problematic segments rather than replacing the original coded stream in-place. This allows the original stream to continue flowing while corrections are prepared and integrated, minimizing disruption to the data flow

Inventive Principle:

Principle #26Copying

Data Source

PatentUS8817873B2Image coding/recording apparatus and image coding/recording method

Publication Date: 2014.08.26 PANASONIC HOLDINGS CORP

AI summary

The invention provides an image coding/recording apparatus which can solve problems of large processing loads due to the real-time re-coding and problems of complicated controls and circuits for returning processing. The image coding/recording apparatus according to an aspect of the invention codes and records image data. The image coding/recording apparatus includes: a coding unit operable to code the image data; a recording unit operable to record the coded data; and a re-coding control unit operable to (i) control said coding unit to re-code the coded data recorded by said recording unit and does not satisfy a predetermined condition, so that the re-coded data satisfies the predetermined condition, and (ii) control said recording unit to record the re-coded data, so that the re-coded data and non-re-coded data are reproduced consecutively.