Motorola VL-RISC MCF5202 Manual de usuario descargar pdf (Pagina 12)

US

2006/0053436

A1

folloW.

One

component

of

satellite

communication

device

108

may

be

a

satellite

dish.

A

satellite

dish

can

focus

the

signal

on

one

or

more

loW-noise

block

?lters

(LNBF),

also

referred

to

as

loW-noise

block

doWn

converters

(LNBDC).

The

LNBFs

may

de-polariZe

and

initially

process

the

signal.

This

initial

processing

may

include

?ltering

noise

from

the

signal

and

doWn-converting

the

signal.

DoWn-conversion

is

sometimes

required

to

transmit

the

signal

110

through

certain cables,

such

as

coaxial

cables.

The

signal

110

arrives

at

the

television

converter

device

100

via

cabling.

One

skilled

in

the

art

Will

recogniZe

that

other

methods

and

other

systems

of

delivering

the

satellite

signal

110

to

the

satellite

set-top-box

100

may

be

possible.

[0027]

A

common

connection

to

television

converter

device

100

and

home

entertainment

system

102

is

a

phone

line

(explained

beloW).

HoWever,

embodiments

of

television

converter

device

100,

in

accordance With

the

present

inven

tion,

may

not

include

or

use

a

landline

phone

connection.

In

a

preferred

embodiment,

the

television

converter

device

100

may

instead

use

a

Wireless

antenna

112

and

a

Wireless

device

118

that

can

receive

or

send

signals

132

to

a

Wireless

phone

toWer

134.

The

Wireless

phone

toWer

134

may

relay

the

signals

132

to

a

Wireless

telecommunications

netWork

(not

shoWn)

that

may

then

send

the

signals

132

to

satellite

television

distributor

104.

In

a

preferred

embodiment,

a

tWo-Way

data-capable

Wireless

communication

device

such

as

a

cellular

phone

or

similar

electronics

may

be used

for

the

Wireless

device

118.

The

Wireless

device

118

may

include

a

data

capable

cellular

modem

or

other

data

capable

device.

TWo

examples

of

Wireless

devices

118

are

the

Motorola

StarTac

8600

or

the

Nokia

7160

cellular

telephones.

The

Wireless

device

118

can

be used

by

the

television

converter

100

to

communicate

With

one

or

more

of

the

pay-television

distributors.

These

communications

may

include

requesting

pay-per-vieW

programming,

reporting

of

purchases

(for

example,

pay-per-vieW

purchases),

obtaining

updates

to

subscriber

programming,

receiving

updates

to

softWare

on

the

satellite

set-top-box

100.

One

skilled

in

the

art

Will

recogniZe

that

there

may

be

other

uses

for

this

Wireless

connection.

One

skilled

in

the

art

Will also

recogniZe

that

the

phone

line

(not

shoWn)

and

the

combination

of

the

Wireless

device

118

and

antenna

112

are

not

mutually

exclusive

connections

to

the

set-top-box

100.

In

other

embodiments,

the

set-top-box

100

may

include

both

a

phone

line

and

the

combination

of

a

Wireless

device

118

and

Wireless

antenna

112.

[0028]

FIG.

2

provides

a

high

level

block

diagram

for

the

satellite

television

converter

device

100,

200

With

DVR

functionality

in

accordance With

the

present

invention.

[0029]

The

signal

110,

204

that

arrives

at

the

satellite

set

top

box 200

may

undergo

extensive

processing.

The

televi

sion

converter

200

may

include

one

or

more

tuner

devices

206

that

may

receive

a

satellite

signal

204.

In

this

embodi

ment,

tuner

device

206

acquires

a

satellite

signal

204

from

satellite

television

distributor

104.

Tuner

device

206

may

initially

process

the

satellite

signal

204.

Tuner

device

206

may

also

receive

subscriber

commands

in

the

form

of

signals

from

control

electronics

unit

202.

Signals

from

control

electronics

unit

202

may

include,

but

is

not

limited

to,

a

signal

to

tune

to

a

transponder

as part

of

the

process of

selecting

a

certain

channel

for

vieWing

on

a

peripheral

Mar.

9,

2006

device.

One

skilled in

the

art

Would

recogniZe

that

the

tuner

device

206

may

include

feWer,

more,

or

different

compo

nents.

[0030]

After

receiving

the

signal

204,

one

of

the

?rst

steps

may

be

to

demodulate

208

the

signal

204.

The

signal

204

may

arrive

as

an

analog

signal

that

“carries”

data

(e.g.,

data

is

modulated

onto

the

analog

signal).

Demodulation

208

may

be

accomplished

by

reversing

the

modulation

process.

Modulation

can be

done

in

several

Ways.

Modulation

may

include

amplitude

modulation

or

frequency

modula

tion

If

the

carried

data

is

digital,

modulation

methods

include,

but

are

not

limited

to,

biphase-shift

keying

(BPSK),

quadraphase-shift

keying

(QPSK),

or

eight-phase

shift

key

ing

(SPSK).

One

skilled

in

the

art

Will

recogniZe

that

other

methods

of

modulating

and

demodulating

the

signal

204

may

be

possible.

Another

one

of

the

?rst

steps

may

also

be

to

error

check

208

signal

204.

One

example

of

error

check

ing

208

is

forWard

error-checking.

ForWard

error-checking

(FEC)

208

may

include,

but

is

not

limited

to,

inspecting

parity

bit

or

bits

that

may

accompany

signal

204.

One

skilled

in

the

art

Will

recogniZe

that

many

methods

for

error

checking

are

possible.

For

the

purposes

of

discussion,

an

embodiment

using

digital

data

Will

be

discussed

beloW.

HoWever,

one

skilled in

the

art

Will

recogniZe

that

systems

With

analog

data

or

combined

analog

and

digital

data

are

also

possible

and

contemplated

herein.

[0031]

In

this

embodiment,

satellite

set-top-box

200

con

tains

control

electronics

unit

202

that

receives

satellite

signal

204.

One

skilled

in

the

art

Will

recogniZe

that

control

electronics

202

may

receive

other

signals,

including,

but not

limited

to,

signals

from

a

cable

or

broadcast

television

distributor.

One

example

of

a

control

electronics

unit

202

is

the

STMicroelectronics

STiSS

17

LoW-Cost

Interactive

Set

top

Box

Decoder,

Part

No.

7424736A.

In

a

preferred

embodiment,

control

electronics

unit

202

includes

discrete

electronic

components

combined

into

a

single

circuit

With

a

shared

bus

210.

In other

embodiments,

control

electronics

unit

202

may

be

con?gured

differently.

For

example,

one

or

more

of

the

control

electronics

unit

202

components

in

set-top-box

200

may

be

combined

or

omitted.

The

control

electronics

unit

202

may

use

a

custom

ASIC,

such

as

from

the

LSILogic

G11

family,

or

FPGA,

such

as

from

the

Altera

StratixTM

family.

As

a

further

example,

one

or

more

of

the

control

electronics

unit

202

components

in

set-top-box

200

may

not

share

a

bus

210,

but

may

nonetheless

be

operatively

connected

by

some

other

means.

One

skilled

in

the

art

Will

recogniZe

that

other

con?gurations

of

set-top-box

200

and

control

electronics

unit

202

are

possible

and

Within

the

scope

of

this

invention.

One

skilled

in

the

art

Will

further

recogniZe

that

some

components

of

set-top-box

200

and

control

electronics

unit

202

may

be

implemented

in

hard

Ware

or

softWare.

The

control

electronics

unit

202

may

operate

under

the

control

of

a

softWare

program,

?rmWare

program,

or

some

other

program

stored

in

memory

or

control

logic.

One

skilled

in

the

art

Will also

recogniZe

that

the

control

electronics

unit

202

may

include

other

electronic

components

or

structures

to

mediate

or

process

signals.

[0032]

Control

electronics

unit

202

may

contain

one

or

more

central-processing-units

(CPUS)

212

or processors.

A

preferred

embodiment

of

control

electronics

unit

202

con

tains

a

single

CPU

212

that

is

operatively

connected

to

the

shared

bus.

In

one

embodiment,

CPU

212

may

be

used,

among

other

things,

for

logical

operations

for

set-top-box

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