# US 6,724,819 B1 · Moving picture transmission apparatus, moving picture reception apparatus, and moving picture data record medium

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- Number: US 6,724,819 B1
- Document ID: US6724819B1
- Status: Granted
- Kind: B1
- Application number: 09/539,152
- Filed: 2000-03-30
- Granted: 2004-04-20
- Earliest claimed: 1999-04-02
- Assignees: Matsushitas Electric Industrial Co., Ltd.
- Inventors: Toshimasa Takaki; Akino Inoue; Toshio Oka
- Web page: https://patentgrep.com/patent/US6724819B1

## CPC

- H04N 19/895: in combination with error concealment
- H04N 19/61: in combination with predictive coding
- H04N 19/89: involving methods or arrangements for detection of transmission errors at the decoder
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

In a moving picture data structure having a structure comprising I pictures (intraframe coded image) and P pictures (interframe forward predictive coded image), a P′ picture of a forward predictive coded image of a picture immediately preceding an I picture and the I picture is placed following the I picture. If an error occurs during the I picture transmission, the P′ picture can be used to recover from the error.

## Claims

### Claim 1

A moving picture transmission apparatus comprising:
moving picture data supply means;
moving picture data acquisition means for acquiring objective moving picture data from said moving picture data supply means; and
data transmission means for transmitting the moving picture data acquired by said moving picture data acquisition means to a transmission line; and
differential data calculation means being placed between said moving picture data supply means and said data transmission means for calculating a P′ picture of a forward predictive coded image of a picture immediately preceding an I picture and the I picture.

### Claim 2

A moving picture transmission apparatus comprising:
moving picture data supply means;
moving picture data acquisition means for acquiring objective moving picture data from said moving picture data supply means;
data transmission means for transmitting the moving picture data acquired by said moving picture data acquisition means to a transmission line;
basic image retention means being placed between said moving picture data supply means and said data transmission means for retaining I pictures; and
differential data calculation means being placed between said moving picture data supply means and said data transmission means for calculating a P″ picture of a forward predictive coded image of an I picture immediately preceding the current I picture and the current I picture.

### Claim 3

A moving picture transmission apparatus comprising:
moving picture data supply means;
moving picture data acquisition means for acquiring objective moving picture data from said moving picture data supply means;
data transmission means for transmitting the moving picture data acquired by said moving picture data acquisition means to a transmission line on a first data band; and
differential data transmission means for transmitting redundant data on a second data band.

### Claim 4

A moving picture reception apparatus comprising:
data reception means for receiving moving picture data from a transmission line on a first data band;
decoding means for decoding the moving picture data received by said data reception means into an image;
display means for displaying the image provided by said decoding means; and
differential data reception means for receiving redundant data on a second data band.

### Claim 5 (depends on 3)

The moving picture transmission apparatus of claim 3, wherein the moving picture data comprises an I picture and the redundant data comprises recovery data for recovering from an error in receiving the I picture.

### Claim 6 (depends on 5)

The moving picture transmission apparatus of claim 5, wherein the recovery data is a P′ picture.

### Claim 7 (depends on 5)

The moving picture transmission apparatus of claim 5, further comprising time information addition means for adding time information to the I picture and adding said time information to the recovery data.

### Claim 8 (depends on 4)

The moving picture reception apparatus of claim 4, wherein the moving picture data comprises an I picture and the redundant data comprises recovery data for recovering from an error in receiving the I picture.

### Claim 9 (depends on 8)

The moving picture reception means of claim 8, wherein the recovery data is a P′ picture.

### Claim 10 (depends on 8)

The moving picture transmission apparatus of claim 8, further comprising error determination means for checking whether a reception error has occurred based on time information transmitted with the I picture and the recovery data.