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D.14 Concatenated sequences

The behaviour of the decoding process and display process for concatenated sequences is not within the scope of this standard. An application that needs to use concatenated sequences must ensure by private arrangement that the decoder will be able to decode and play concatenated sequences.

Applications should ensure that decoders will have an acceptable behaviour when parameters change. For example changes to the

Frame size

Frame rate

Field parity of the first displayed field of the new sequence versus the field parity of the final displayed field of the previous sequence.

Buffer status

amongst others may cause problems.

Annex E

Profile and level restrictions

E.1 Syntax element restrictions in profiles

NOTE - This Clause is informative and is simply intended as a summary of the normative restrictions set out in Clause 8. If, because of an error in the preparation of this text, a discrepancy exists between Clause 8 and Annex E the normative text in Clause 8 shall always take precedence.

In the tables that follow a number of abbreviations are used as shown in Table E-1.

Table E-1. Abbreviations used in the Tables of Clause E

Abbreviation	Used in	Meaning
x	Status	must be supported by the decoder
o	Status	need not be supported by the decoder
P	Type	item for post-processing after decoding; the decoder must be capable of decoding bitstreams which contain these items, but their use is beyond the scope of this Recommendation | International Standard.

NOTE - “Status” is kept blank if an entry is not a syntactic element.

Table E-2. Sequence header

Status

Type

HIGH

SPATIAL

SNR

MAIN

SIMPLE

#

Syntactic elements

Comments

01

horizontal_size_value

x

x

x

x

x

D

see Table 8-7

02

vertical_size_value

x

x

x

x

x

D

see Table 8-7

15

sequence_scalable_extension()

o

o

x

x

x

I

see Table 8-11 for maximum number of scalable layers

16

user_data()

x

x

x

x

x

I

decoder may skip this data

Table E-3. Sequence extension

Status

Type

HIGH

SPATIAL

SNR

MAIN

SIMPLE

#

Syntactic elements

Comments

01

profile_and_level_indication

x

x

x

x

x

D

profile: one of 8 values level: one of 16 values escape bit: one of 2 values

02

progressive_sequence

x

x

x

x

x

I

06

bit_rate_extension

x

x

x

x

x

D

input picture size related

10

frame_rate_extension_d

x

x

x

x

x

I

set to 0 for all defined profiles

Table E-4. Sequence display extension elements

Status

Type

HIGH

SPATIAL

SNR

MAIN

SIMPLE

#

Syntactic elements

Comments

01

video_format

x

x

x

x

x

P

02

colour_description

x

x

x

x

x

P

input format related

07

display_vertical_size

x

x

x

x

x

P

input format related

Table E-5. Sequence scalable extension

Status

Type

HIGH

SPATIAL

SNR

MAIN

SIMPLE

#

Syntactic elements

Comments

01

scalable_mode

o

o

x

x

x

I

SNR Profile: SNR Scalability Spatial and High Profile: SNR or Spatial Scalability

02

layer_id

o

o

x

x

x

I

12

picture_mux_factor

o

o

o

o

o

I