lllllllllllllllllllllllllllllllllllllllllllllllllllllllllIlllllllllllllllll United States Patent [191 Juri et al.

USOO5329375A

[11] Patent Number: 5,329,375 [45] Date of Patent: Jul. 12, 1994

[54] INFORMATION RECORDING/REPRODUCING APPARATUS

[75] Inventors: Tatsuro Juri, Osaka; Masaru Nakahama, Neyagawa, both of Japan

Matsushita Electric Industrial Co., Ltd., Osaka, Japan

840,755 Feb. 24, 1992

Foreign Application Priority Data

[73] Assignee:

[21] App]. No.:

[22] Filed:

[30] Feb. 26, 1991 [JP] Japan ................................ .. 3-030563

[51] Int. Cl.5 ........................................... .. H04N 7/ 133 [52] US. Cl. .................................. .. 358/343; 348/408;

348/472 [58] Field of Search ............... .. 358/133, 135, 136, 13,

358/141, 343; H04N 7/133

[56] References Cited U.S. PATENT DOCUMENTS

4,656,500 4/1987 4,907,101 3/1990 4,982,282 l/l99l 4,984,076 1/1991 5,047,852 9/1991 5,073,821 12/1991

FOREIGN PATENT DOCUMENTS

0339589 2/1989 European Pat. Off. . 0401854 12/1990 European Pat. Off. .

OTHER PUBLICATIONS

Patent Abstract of Japan, vol. 014, No. 182 (E-916)

Apr. 12, 1990 & J P-A-20 32 688 (Hitachi Ltd.) 2 Feb. 2, 1990. IEEE Global Telecommunications Conference & Exhi bition, Nov. 1988, Hollywood, Fla., US, pp. 1073-1079, XPO0OO79274 DOI et al., “Adaptive DCT Coding For Home Digital VTR”, p. 1073, left column, par. 1, p. 1074, right column, par. 3, p. 1075, right column, par. 2, FIGS. 2-3, 8. IEEE Transaction On Consumer Electronics, vol. CE-35, No. 3, Aug. 1989, New York, US, pp. 450—457, XPOOOO65969, Yamamitsu et al., “An Experimental Study For a Home-Use Digital VTR”, p. 454, left col umn, line 1, p. 455, right column, par. 1, FIGS. 6-7.

Primary Examiner-Howard W. Britton Attorney, Agent, or Firm-Wenderoth, Lind & Ponack

[57] ABSTRACT In the recording apparatus and reproducing apparatus employing variable length coding, a formatting which prevents propagation of error due to transmission route error is realized. The input quantized value is coded in variable length and recorded in a ?rst memory. The variable length code words recorded in the ?rst mem ory are read out and formatted, and recorded into a second memory. In reproduction, the quantized value is decoded in the reverse sequence. By executing variable length coding and formatting in a pipeline operation by using two memories, high speed input signals such as moving picture signals can be formatted. Components of the recording apparatus and reproducing apparatus can be shared, and the circuit scale may be effectively reduced.

12 Claims, 30 Drawing Sheets

INPUT r100 r101 H02 A03 A04 105 SMALL BLOCK LARGE BLOCK ORTHOGONAL VARIABLE

°_’ FORMING UNIT F" FORMING UNIT _’TRA%%§,?CREM'NG '" QUANT'ZER _’ c0DL|§g(];]g/|<;E Q

,114

[HS-F DRAM [116 /120 .- _L-o °__L mam/e- 117 /118 119i" FHA“

DRAM ° -=» __ DATA CONTROL 0

,10B 1 I l VRAM FBAM _|

r106 [1071: POINTERRATAmg [112 |_ 12-’- ‘23 f _ DATA gbqpmot _ 0/’- ">0- - TRANSMISSION

o- fno - De UNIT —’°

POINTER RAM

,111 VRAM

US. Patent July 12, 1994 Sheet 1 of 30 5,329,375

5E6

526 . P586 @252

8m M 1| 9: 11.. 2o: 1 M58 20:1

-omoomm -5382 8&8

\ E85 9 m\ @\ \.\ 1 56%

26% 1 tmmma 1 586 1 @258 1 5&6 1 56% E952 . 22% 1. E05: 162m: .5723 ED

525,; @\ m\ T m\ N\. I

F .GE

US. Patent July 12, 1994 Sheet 2 of 30 5,329,375

2) n 2% S) m 2E

55% 6528 mwwmamz :\

w 6E

U.S. Patent July 12, 1994 Sheet 3 of 30 5,329,375

FIG. 3(a)

v15

V16 T0 ERROR > CORRECTION

‘I7

v18

CODE ADDING CIRCUIT? _,

v

ADDRESS CONTROL CIRCUIT V14

RAM 0

(LOW FREQUENCY COMPONENT)

RAM d

HIGH FREQUENCY COMPONENT)

RAM e

(LOW FREQUENCY COMPONENT)

RAM I

(HIGH FREQUENCY COMPONENT)

DATA FROM FORMA'ITING CIRCUIT 5

FIG. 3(b)

) RAM 0 (RAM e)

) RAM d (RAM f)

/15(17)

DCT @

US. Patent July 12, 1994 Sheet 4 of 30 5,329,375

W00 0 mtm m

@

.50

@ 0.00 @

.50

@ 0.00 G

@ 8 .50

<0 IQ: - - $00.00 02m <0 >>O|_ - . . x0000 ._.m_.

w 6E

mwh>m 2

V5650 02m

US. Patent July 12, 1994 Sheet 6 of 30 5,329,375

FIG. 5 /2s

ADDRESS CCNTRDI. CIRCUIT

RAM 9 _,29

RAM h D30 TO EQEQERQM DEFDRMATTINC CCRRECTIDN C'RCU'T 2-3

CIRCUIT 19 RAM i J31

RAM j .32

FIG. 7 [as

ADDRESS CONTROL CIRCUIT

U RAM k

TO 34 ' '

FROM v VARIABLE

DEFORMATTING ENGTH CIRCUIT 21 DING

IT 25 J35 RAM I

US. Patent July 12, 1994 Sheet 7 of 30 5,329,375

FIG. 8

K41 INPUT

/43 I /42 CODE LENGTH VARIABLE LENGTH DETECTION ‘ CODING

v /44 SHIFTING DEVICE V

v v /45 SELECTOR

/46

V

REGISTER

v r47 : VRAM

v v r48 : SWITCH

CONTROL , r49

SHIFTING DEVICE V

v v [50 SELECTOR II

v /51 REGISTER

/52 CODE LENGTH DETECTION

v /53 FRAM

I K54 OUTPUT

v

US. Patent

CONTROL

July 12, 1994

FIG. 9

Sheet 8 of 30 5,329,375

[56 INPUT

I r57 : FRAM

v v /58 SWITCH II

SHIFTING DEVICE II

SELECTOR

II

/62

II

REGISTER

DETECTION CODE LENGTH

II /53 : VRAM

v v [64 : SELECTOR

fse CODE LENGTH DETECTION

v /65 REGISTER V

v /56 SHIFTING DEVICE V

v /57 VARIABLE LENGTH

DECODING

I r69 OUTPUT

US. Patent July 12, 1994 Sheet 9 of 30 5,329,375

FIG. 10 72\ (71 DECODING OUTPUT COfING INPUT

/74 /73 _ CODE LENGTH ‘ VARIABLE LENGTH

DETECTION T CODING/DECODING

II

II II /75 > SWITCH

I /75 SHIFTING DEVICE II

II II /81 SWITCH

CONTROL I fez sHIFrING DEVICE

II

II

II II /83 > SELECTOR

v REGISTER

r85 CODE LENGTH DETECTION

II / 86 > FRAM

8% I I K87 DECODING INPUT CODING OUTPUT

US. Patent July 12, 1994 Sheet 11 of 30 5,329,375

$46528 www¢8< a?

mom I :2: 5% E ézgw wozmmmmma moéo v \ 5N

SHEET >55: lltzz 5%: E 565 mozmmwza E28 I155 52 2 56a wwwzEwam

2~\ \

8m 2 6E

US. Patent July 12, 1994 Sheet 12 of 30 5,329,375

FIG. 15

DCv/TNO. o 1 2 3 4 s 14

FIRSTH 15DCT CKS Y Y CR Y -Y 05 CR

‘ SECOND HALF 15 DOT BLOCKS V

‘ 15 1e 17 1s 19 2o 29 FIRSTHALF 15DCTBLOCKS Y Y CB Y Y CR CB

‘ SECOND HALF 15 DOT BLOCKS '

FIG. 13

SMALL BLOCK (1 DCT BLOCK)

8

Q8 @ @

1 FRAME

US. Patent July 12, 1994 Sheet 13 of 30 5,329,375

FIG. 14

DC COMPONENT

LQW RANGE / HORIZONTAL OIREOTION HIGH RANGE

10 11 21 22 // 2

6 VERTICAL OIREOTION 7

HIGH 15 RANGE

16

2s

29

gcnmcn'cn-c-oooo oocoooocowo:

US. Patent July 12, 1994 Sheet 14 of 30 5,329,375

2 t 2 9 m N _ 0

“BE mv .1 E52 11 E59 w

5.5 m8 2 6E

US. Patent July 12, 1994 Sheet 15 of 30 5,329,375

FIG. 17(a) _ 10 BYTE D

LSB : I ‘

8 BIT

c __

MSB v

FIG. 17(b) 5 BYTE

LSB ‘, I’

MSB l

US. Patent July 12, 1994 Sheet 16 of 30 5,329,375

6i $8 2 55/

, A25 88 z_ 5% 65V 0 65V 0 . 62 $8 2 <55 :8 7: E3 38 2 E5

Q Q

N F o 3 6E

US. Patent July 12, 1994 Sheet 17 of 30 5,329,375

FIG. 19(a)

l l l l l A o s 1314 1617 2930

B1,‘; DCTO DCT1 DCT2 DCT3

FIG. 19(1))

a b c d e f

7 7 ¢ ¢ 7 /

ééééZ /

SHADED AREA DENOTES INVALID DATA

US. Patent July 12, 1994 Sheet’ 19 of 30 5,329,375

55 6528 <20 M

92 m 2% m

,. mm; A ,. .6 m

,, EESE “, "665mm “ ¢ 28¢ v A, m 8 E 8? v u

\ \ ‘7 E52 m

in 8” mm; , 59; m

.295 “ I v. 1525 “ m, EEO F maoo m 8T 8? 8? w 9 m

<55 “ , A , H. M58 2, $562; 2. $285 + _ ............. 1:55

.81 51 mmwx

._<zo_w " w

E56“ m m

22% A m

zocowma ................................................................................................... mow E 6E